Merge branch 'master' of ssh://gerrit.onlab.us:29418/onos-next

@@ -28,8 +28,10 @@
       <dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-annotations</artifactId>
         <artifactId>jackson-annotations</artifactId>
-        <version>2.4.2</version>
-        <scope>provided</scope>
+      </dependency>
+      <dependency>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onlab-misc</artifactId>
       </dependency>
       </dependency>
     </dependencies> 
     </dependencies> 
 
 

@@ -41,5 +41,17 @@
             <groupId>org.apache.karaf.shell</groupId>
             <groupId>org.apache.karaf.shell</groupId>
             <artifactId>org.apache.karaf.shell.console</artifactId>
             <artifactId>org.apache.karaf.shell.console</artifactId>
         </dependency>
         </dependency>
+        <dependency>
+            <groupId>org.onlab.onos</groupId>
+            <artifactId>onlab-misc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.osgi</groupId>
+            <artifactId>org.osgi.core</artifactId>
+        </dependency>
     </dependencies>
     </dependencies>
 </project>
 </project>

@@ -170,10 +170,6 @@ public class ReactiveForwarding {
         // We don't yet support bufferids in the flowservice so packet out first.
         // We don't yet support bufferids in the flowservice so packet out first.
         packetOut(context, portNumber);
         packetOut(context, portNumber);
 
 
-        if (true) {
-            return;
-        }
-
         // Install the flow rule to handle this type of message from now on.
         // Install the flow rule to handle this type of message from now on.
         Ethernet inPkt = context.inPacket().parsed();
         Ethernet inPkt = context.inPacket().parsed();
         TrafficSelector.Builder builder = DefaultTrafficSelector.builder();
         TrafficSelector.Builder builder = DefaultTrafficSelector.builder();

@@ -16,4 +16,14 @@
 
 
     <description>ONOS simple Mobility app</description>
     <description>ONOS simple Mobility app</description>
 
 
+    <dependencies>
+      <dependency>
+        <groupId>com.google.guava</groupId>
+        <artifactId>guava</artifactId>
+      </dependency>
+      <dependency>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onlab-misc</artifactId>
+      </dependency>
+    </dependencies>
 </project>
 </project>

@@ -24,6 +24,7 @@
         <module>mobility</module>
         <module>mobility</module>
         <module>proxyarp</module>
         <module>proxyarp</module>
         <module>config</module>
         <module>config</module>
+        <module>sdnip</module>
     </modules>
     </modules>
 
 
     <properties>
     <properties>

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onos-apps</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-app-sdnip</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>SDN-IP peering application</description>
+
+    <dependencies>
+      <dependency>
+        <groupId>org.codehaus.jackson</groupId>
+        <artifactId>jackson-core-asl</artifactId>
+      </dependency>
+      <dependency>
+        <groupId>org.codehaus.jackson</groupId>
+        <artifactId>jackson-mapper-asl</artifactId>
+      </dependency>
+      <dependency>
+        <groupId>com.fasterxml.jackson.core</groupId>
+        <artifactId>jackson-annotations</artifactId>
+        <version>2.4.2</version>
+        <scope>provided</scope>
+      </dependency>
+    </dependencies> 
+
+</project>

+package org.onlab.onos.sdnip;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.slf4j.Logger;
+
+/**
+ * Placeholder SDN-IP component.
+ */
+@Component(immediate = true)
+public class SdnIp {
+
+    private final Logger log = getLogger(getClass());
+
+    @Activate
+    protected void activate() {
+        log.debug("SDN-IP started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        log.info("Stopped");
+    }
+}

+/**
+ * SDN-IP peering application.
+ */
+package org.onlab.onos.sdnip;
\ No newline at end of file

@@ -141,7 +141,7 @@ public class TopologyResource extends BaseResource {
     private ObjectNode json(ObjectMapper mapper, ElementId id, int group,
     private ObjectNode json(ObjectMapper mapper, ElementId id, int group,
                             String label, boolean isOnline) {
                             String label, boolean isOnline) {
         return mapper.createObjectNode()
         return mapper.createObjectNode()
-                .put("name", id.uri().toString())
+                .put("name", id.toString())
                 .put("label", label)
                 .put("label", label)
                 .put("group", group)
                 .put("group", group)
                 .put("online", isOnline);
                 .put("online", isOnline);
@@ -202,7 +202,7 @@ public class TopologyResource extends BaseResource {
     // Returns a formatted string for the element associated with the given
     // Returns a formatted string for the element associated with the given
     // connection point.
     // connection point.
     private static String id(ConnectPoint cp) {
     private static String id(ConnectPoint cp) {
-        return cp.elementId().uri().toString();
+        return cp.elementId().toString();
     }
     }
 
 
 }
 }

 /**
 /**
- * REST resources for the sample topology viewer application.
+ * Sample topology viewer application.
  */
  */
 package org.onlab.onos.tvue;
 package org.onlab.onos.tvue;

@@ -21,14 +21,14 @@ public final class Comparators {
     public static final Comparator<ElementId> ELEMENT_ID_COMPARATOR = new Comparator<ElementId>() {
     public static final Comparator<ElementId> ELEMENT_ID_COMPARATOR = new Comparator<ElementId>() {
         @Override
         @Override
         public int compare(ElementId id1, ElementId id2) {
         public int compare(ElementId id1, ElementId id2) {
-            return id1.uri().toString().compareTo(id2.uri().toString());
+            return id1.toString().compareTo(id2.toString());
         }
         }
     };
     };
 
 
     public static final Comparator<Element> ELEMENT_COMPARATOR = new Comparator<Element>() {
     public static final Comparator<Element> ELEMENT_COMPARATOR = new Comparator<Element>() {
         @Override
         @Override
         public int compare(Element e1, Element e2) {
         public int compare(Element e1, Element e2) {
-            return e1.id().uri().toString().compareTo(e2.id().uri().toString());
+            return e1.id().toString().compareTo(e2.id().toString());
         }
         }
     };
     };
 
 

 package org.onlab.onos.cli;
 package org.onlab.onos.cli;
 
 
 import com.google.common.collect.Lists;
 import com.google.common.collect.Lists;
-
 import org.apache.karaf.shell.commands.Command;
 import org.apache.karaf.shell.commands.Command;
 import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.cluster.MastershipService;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipService;
 
 
 import java.util.Collections;
 import java.util.Collections;
 import java.util.List;
 import java.util.List;
@@ -23,7 +22,7 @@ public class MastersListCommand extends AbstractShellCommand {
     @Override
     @Override
     protected void execute() {
     protected void execute() {
         ClusterService service = get(ClusterService.class);
         ClusterService service = get(ClusterService.class);
-        DeviceMastershipService mastershipService = get(DeviceMastershipService.class);
+        MastershipService mastershipService = get(MastershipService.class);
         List<ControllerNode> nodes = newArrayList(service.getNodes());
         List<ControllerNode> nodes = newArrayList(service.getNodes());
         Collections.sort(nodes, Comparators.NODE_COMPARATOR);
         Collections.sort(nodes, Comparators.NODE_COMPARATOR);
         ControllerNode self = service.getLocalNode();
         ControllerNode self = service.getLocalNode();

@@ -22,8 +22,10 @@ public class SummaryCommand extends AbstractShellCommand {
     protected void execute() {
     protected void execute() {
         TopologyService topologyService = get(TopologyService.class);
         TopologyService topologyService = get(TopologyService.class);
         Topology topology = topologyService.currentTopology();
         Topology topology = topologyService.currentTopology();
-        print("version=%s, nodes=%d, devices=%d, links=%d, hosts=%d, clusters=%s, paths=%d, flows=%d, intents=%d",
-              get(CoreService.class).version().toString(),
+        print("node=%s, version=%s",
+              get(ClusterService.class).getLocalNode().ip(),
+              get(CoreService.class).version().toString());
+        print("nodes=%d, devices=%d, links=%d, hosts=%d, clusters=%s, paths=%d, flows=%d, intents=%d",
               get(ClusterService.class).getNodes().size(),
               get(ClusterService.class).getNodes().size(),
               get(DeviceService.class).getDeviceCount(),
               get(DeviceService.class).getDeviceCount(),
               get(LinkService.class).getLinkCount(),
               get(LinkService.class).getLinkCount(),

@@ -3,9 +3,9 @@ package org.onlab.onos.cli.net;
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
 import org.apache.karaf.shell.commands.Command;
 import org.onlab.onos.cli.AbstractShellCommand;
 import org.onlab.onos.cli.AbstractShellCommand;
+import org.onlab.onos.cluster.MastershipAdminService;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
-import org.onlab.onos.net.device.DeviceMastershipAdminService;
 
 
 import static org.onlab.onos.net.DeviceId.deviceId;
 import static org.onlab.onos.net.DeviceId.deviceId;
 
 
@@ -30,7 +30,7 @@ public class DeviceRoleCommand extends AbstractShellCommand {
 
 
     @Override
     @Override
     protected void execute() {
     protected void execute() {
-        DeviceMastershipAdminService service = get(DeviceMastershipAdminService.class);
+        MastershipAdminService service = get(MastershipAdminService.class);
         MastershipRole mastershipRole = MastershipRole.valueOf(role.toUpperCase());
         MastershipRole mastershipRole = MastershipRole.valueOf(role.toUpperCase());
         service.setRole(new NodeId(node), deviceId(uri), mastershipRole);
         service.setRole(new NodeId(node), deviceId(uri), mastershipRole);
     }
     }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
-import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
 
 
 /**
 /**
  * Service for administering the inventory of device masterships.
  * Service for administering the inventory of device masterships.
  */
  */
-public interface DeviceMastershipAdminService {
+public interface MastershipAdminService {
 
 
     /**
     /**
      * Applies the current mastership role for the specified device.
      * Applies the current mastership role for the specified device.

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
-import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.event.AbstractEvent;
 import org.onlab.onos.event.AbstractEvent;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 
 
 /**
 /**
  * Describes a device mastership event.
  * Describes a device mastership event.
  */
  */
-public class DeviceMastershipEvent extends AbstractEvent<DeviceMastershipEvent.Type, DeviceId> {
+public class MastershipEvent extends AbstractEvent<MastershipEvent.Type, DeviceId> {
 
 
     //do we worry about explicitly setting slaves/equals? probably not,
     //do we worry about explicitly setting slaves/equals? probably not,
     //to keep it simple
     //to keep it simple
@@ -31,7 +30,7 @@ public class DeviceMastershipEvent extends AbstractEvent<DeviceMastershipEvent.T
      * @param device event device subject
      * @param device event device subject
      * @param master master ID subject
      * @param master master ID subject
      */
      */
-    public DeviceMastershipEvent(Type type, DeviceId device, NodeId master) {
+    public MastershipEvent(Type type, DeviceId device, NodeId master) {
         super(type, device);
         super(type, device);
         this.master = master;
         this.master = master;
     }
     }
@@ -45,7 +44,7 @@ public class DeviceMastershipEvent extends AbstractEvent<DeviceMastershipEvent.T
      * @param master master ID subject
      * @param master master ID subject
      * @param time   occurrence time
      * @param time   occurrence time
      */
      */
-    public DeviceMastershipEvent(Type type, DeviceId device, NodeId master, long time) {
+    public MastershipEvent(Type type, DeviceId device, NodeId master, long time) {
         super(type, device, time);
         super(type, device, time);
         this.master = master;
         this.master = master;
     }
     }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import org.onlab.onos.event.EventListener;
 import org.onlab.onos.event.EventListener;
 
 
 /**
 /**
  * Entity capable of receiving device mastership-related events.
  * Entity capable of receiving device mastership-related events.
  */
  */
-public interface DeviceMastershipListener extends EventListener<DeviceMastershipEvent> {
+public interface MastershipListener extends EventListener<MastershipEvent> {
 }
 }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import java.util.Set;
 import java.util.Set;
 
 
-import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
 
 
@@ -12,7 +11,7 @@ import org.onlab.onos.net.MastershipRole;
  * determining mastership, but is not responsible for actually applying it
  * determining mastership, but is not responsible for actually applying it
  * to the devices; this falls on the device service.
  * to the devices; this falls on the device service.
  */
  */
-public interface DeviceMastershipService {
+public interface MastershipService {
 
 
     /**
     /**
      * Returns the role of the local node for the specified device, without
      * Returns the role of the local node for the specified device, without
@@ -63,20 +62,20 @@ public interface DeviceMastershipService {
      *
      *
      * @return the MastershipTermService for this mastership manager
      * @return the MastershipTermService for this mastership manager
      */
      */
-    DeviceMastershipTermService requestTermService();
+    MastershipTermService requestTermService();
 
 
     /**
     /**
      * Adds the specified mastership change listener.
      * Adds the specified mastership change listener.
      *
      *
      * @param listener the mastership listener
      * @param listener the mastership listener
      */
      */
-    void addListener(DeviceMastershipListener listener);
+    void addListener(MastershipListener listener);
 
 
     /**
     /**
      * Removes the specified mastership change listener.
      * Removes the specified mastership change listener.
      *
      *
      * @param listener the mastership listener
      * @param listener the mastership listener
      */
      */
-    void removeListener(DeviceMastershipListener listener);
+    void removeListener(MastershipListener listener);
 
 
 }
 }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import java.util.Set;
 import java.util.Set;
 
 
-import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.store.Store;
 import org.onlab.onos.store.Store;
@@ -11,7 +10,7 @@ import org.onlab.onos.store.Store;
  * Manages inventory of mastership roles for devices, across controller
  * Manages inventory of mastership roles for devices, across controller
  * instances; not intended for direct use.
  * instances; not intended for direct use.
  */
  */
-public interface DeviceMastershipStore extends Store<DeviceMastershipEvent, DeviceMastershipStoreDelegate> {
+public interface MastershipStore extends Store<MastershipEvent, MastershipStoreDelegate> {
 
 
     // three things to map: NodeId, DeviceId, MastershipRole
     // three things to map: NodeId, DeviceId, MastershipRole
 
 
@@ -55,7 +54,7 @@ public interface DeviceMastershipStore extends Store<DeviceMastershipEvent, Devi
      * @param deviceId device identifier
      * @param deviceId device identifier
      * @return a mastership event
      * @return a mastership event
      */
      */
-    DeviceMastershipEvent setMaster(NodeId nodeId, DeviceId deviceId);
+    MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId);
 
 
     /**
     /**
      * Returns the current master and number of past mastership hand-offs
      * Returns the current master and number of past mastership hand-offs
@@ -64,7 +63,7 @@ public interface DeviceMastershipStore extends Store<DeviceMastershipEvent, Devi
      * @param deviceId the device identifier
      * @param deviceId the device identifier
      * @return the current master's ID and the term value for device, or null
      * @return the current master's ID and the term value for device, or null
      */
      */
-    DeviceMastershipTerm getTermFor(DeviceId deviceId);
+    MastershipTerm getTermFor(DeviceId deviceId);
 
 
     /**
     /**
      * Sets a controller instance's mastership role to STANDBY for a device.
      * Sets a controller instance's mastership role to STANDBY for a device.
@@ -75,7 +74,7 @@ public interface DeviceMastershipStore extends Store<DeviceMastershipEvent, Devi
      * @param deviceId device to revoke mastership role for
      * @param deviceId device to revoke mastership role for
      * @return a mastership event
      * @return a mastership event
      */
      */
-    DeviceMastershipEvent setStandby(NodeId nodeId, DeviceId deviceId);
+    MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId);
 
 
     /**
     /**
      * Allows a controller instance to give up its current role for a device.
      * Allows a controller instance to give up its current role for a device.
@@ -86,6 +85,6 @@ public interface DeviceMastershipStore extends Store<DeviceMastershipEvent, Devi
      * @param deviceId device to revoke mastership role for
      * @param deviceId device to revoke mastership role for
      * @return a mastership event
      * @return a mastership event
      */
      */
-    DeviceMastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId);
+    MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId);
 
 
 }
 }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import org.onlab.onos.store.StoreDelegate;
 import org.onlab.onos.store.StoreDelegate;
 
 
 /**
 /**
- * DeviceMastership store delegate abstraction.
+ * Mastership store delegate abstraction.
  */
  */
-public interface DeviceMastershipStoreDelegate extends StoreDelegate<DeviceMastershipEvent> {
+public interface MastershipStoreDelegate extends StoreDelegate<MastershipEvent> {
 }
 }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import java.util.Objects;
 import java.util.Objects;
 
 
-import org.onlab.onos.cluster.NodeId;
-
-public final class DeviceMastershipTerm {
+public final class MastershipTerm {
 
 
     private final NodeId master;
     private final NodeId master;
     private final int termNumber;
     private final int termNumber;
 
 
-    private DeviceMastershipTerm(NodeId master, int term) {
+    private MastershipTerm(NodeId master, int term) {
         this.master = master;
         this.master = master;
         this.termNumber = term;
         this.termNumber = term;
     }
     }
 
 
-    public static DeviceMastershipTerm of(NodeId master, int term) {
-        return new DeviceMastershipTerm(master, term);
+    public static MastershipTerm of(NodeId master, int term) {
+        return new MastershipTerm(master, term);
     }
     }
 
 
     public NodeId master() {
     public NodeId master() {
@@ -36,8 +34,8 @@ public final class DeviceMastershipTerm {
         if (this == other) {
         if (this == other) {
             return true;
             return true;
         }
         }
-        if (other instanceof DeviceMastershipTerm) {
-            DeviceMastershipTerm that = (DeviceMastershipTerm) other;
+        if (other instanceof MastershipTerm) {
+            MastershipTerm that = (MastershipTerm) other;
             if (!this.master.equals(that.master)) {
             if (!this.master.equals(that.master)) {
                 return false;
                 return false;
             }
             }

-package org.onlab.onos.net.device;
+package org.onlab.onos.cluster;
 
 
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 
 
@@ -6,7 +6,7 @@ import org.onlab.onos.net.DeviceId;
 /**
 /**
  * Service to obtain mastership term information.
  * Service to obtain mastership term information.
  */
  */
-public interface DeviceMastershipTermService {
+public interface MastershipTermService {
 
 
     // TBD: manage/increment per device mastership change
     // TBD: manage/increment per device mastership change
     //      or increment on any change
     //      or increment on any change
@@ -16,5 +16,5 @@ public interface DeviceMastershipTermService {
      * @param deviceId the identifier of the device
      * @param deviceId the identifier of the device
      * @return current master's term.
      * @return current master's term.
      */
      */
-    DeviceMastershipTerm getMastershipTerm(DeviceId deviceId);
+    MastershipTerm getMastershipTerm(DeviceId deviceId);
 }
 }

 package org.onlab.onos.net;
 package org.onlab.onos.net;
 
 
 import java.net.URI;
 import java.net.URI;
+import java.util.Objects;
 
 
 /**
 /**
  * Immutable representation of a device identity.
  * Immutable representation of a device identity.
  */
  */
 public final class DeviceId extends ElementId {
 public final class DeviceId extends ElementId {
 
 
+    /**
+     * Represents either no device, or an unspecified device.
+     */
+    public static final DeviceId NONE = deviceId("none:none");
+
+    private final URI uri;
+    private final String str;
+
     // Public construction is prohibited
     // Public construction is prohibited
     private DeviceId(URI uri) {
     private DeviceId(URI uri) {
-        super(uri);
+        this.uri = uri;
+        this.str = uri.toString();
+    }
+
+
+    // Default constructor for serialization
+    protected DeviceId() {
+        this.uri = null;
+        this.str = null;
     }
     }
 
 
     /**
     /**
@@ -30,4 +47,36 @@ public final class DeviceId extends ElementId {
         return deviceId(URI.create(string));
         return deviceId(URI.create(string));
     }
     }
 
 
+    /**
+     * Returns the backing URI.
+     *
+     * @return backing URI
+     */
+    public URI uri() {
+        return uri;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(str);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof DeviceId) {
+            final DeviceId that = (DeviceId) obj;
+            return this.getClass() == that.getClass() &&
+                    Objects.equals(this.str, that.str);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return str;
+    }
+
 }
 }

 package org.onlab.onos.net;
 package org.onlab.onos.net;
 
 
-import java.net.URI;
-import java.util.Objects;
-
 /**
 /**
  * Immutable representation of a network element identity.
  * Immutable representation of a network element identity.
  */
  */
 public abstract class ElementId {
 public abstract class ElementId {
-
-    private final URI uri;
-    private final String str;
-
-    // Default constructor for serialization
-    protected ElementId() {
-        this.uri = null;
-        this.str = null;
-    }
-
-    /**
-     * Creates an element identifier using the supplied URI.
-     *
-     * @param uri backing URI
-     */
-    protected ElementId(URI uri) {
-        this.uri = uri;
-        this.str = uri.toString();
-    }
-
-    /**
-     * Returns the backing URI.
-     *
-     * @return backing URI
-     */
-    public URI uri() {
-        return uri;
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(str);
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj instanceof ElementId) {
-            final ElementId that = (ElementId) obj;
-            return this.getClass() == that.getClass() &&
-                    Objects.equals(this.str, that.str);
-        }
-        return false;
-    }
-
-    @Override
-    public String toString() {
-        return str;
-    }
-
 }
 }

@@ -3,44 +3,69 @@ package org.onlab.onos.net;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.packet.VlanId;
 
 
-import java.net.URI;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkArgument;
 
 
 /**
 /**
  * Immutable representation of a host identity.
  * Immutable representation of a host identity.
  */
  */
 public final class HostId extends ElementId {
 public final class HostId extends ElementId {
 
 
-    private static final String NIC = "nic";
-
     /**
     /**
      * Represents either no host, or an unspecified host; used for creating
      * Represents either no host, or an unspecified host; used for creating
      * open ingress/egress edge links.
      * open ingress/egress edge links.
      */
      */
-    public static final HostId NONE = hostId(NIC + ":none-0");
+    public static final HostId NONE = new HostId(MacAddress.ZERO, VlanId.NONE);
+
+    private static final int MAC_LENGTH = 17;
+    private static final int MIN_ID_LENGTH = 19;
+
+    private final MacAddress mac;
+    private final VlanId vlanId;
 
 
     // Public construction is prohibited
     // Public construction is prohibited
-    private HostId(URI uri) {
-        super(uri);
+    private HostId(MacAddress mac, VlanId vlanId) {
+        this.mac = mac;
+        this.vlanId = vlanId;
+    }
+
+    // Default constructor for serialization
+    private HostId() {
+        this.mac = null;
+        this.vlanId = null;
     }
     }
 
 
     /**
     /**
-     * Creates a device id using the supplied URI.
+     * Returns the host MAC address.
      *
      *
-     * @param uri device URI
-     * @return host identifier
+     * @return MAC address
+     */
+    public MacAddress mac() {
+        return mac;
+    }
+
+    /**
+     * Returns the host MAC address.
+     *
+     * @return MAC address
      */
      */
-    public static HostId hostId(URI uri) {
-        return new HostId(uri);
+    public VlanId vlanId() {
+        return vlanId;
     }
     }
 
 
     /**
     /**
-     * Creates a device id using the supplied URI string.
+     * Creates a device id using the supplied ID string.
      *
      *
      * @param string device URI string
      * @param string device URI string
      * @return host identifier
      * @return host identifier
      */
      */
     public static HostId hostId(String string) {
     public static HostId hostId(String string) {
-        return hostId(URI.create(string));
+        checkArgument(string.length() >= MIN_ID_LENGTH,
+                      "Host ID must be at least %s characters", MIN_ID_LENGTH);
+        MacAddress mac = MacAddress.valueOf(string.substring(0, MAC_LENGTH));
+        VlanId vlanId = VlanId.vlanId(Short.parseShort(string.substring(MAC_LENGTH + 1)));
+        return new HostId(mac, vlanId);
     }
     }
 
 
     /**
     /**
@@ -51,7 +76,7 @@ public final class HostId extends ElementId {
      * @return host identifier
      * @return host identifier
      */
      */
     public static HostId hostId(MacAddress mac, VlanId vlanId) {
     public static HostId hostId(MacAddress mac, VlanId vlanId) {
-        return hostId(NIC + ":" + mac + "-" + vlanId);
+        return new HostId(mac, vlanId);
     }
     }
 
 
     /**
     /**
@@ -64,4 +89,26 @@ public final class HostId extends ElementId {
         return hostId(mac, VlanId.vlanId(VlanId.UNTAGGED));
         return hostId(mac, VlanId.vlanId(VlanId.UNTAGGED));
     }
     }
 
 
+    public String toString() {
+        return mac + "/" + vlanId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mac, vlanId);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof HostId) {
+            final HostId other = (HostId) obj;
+            return Objects.equals(this.mac, other.mac) &&
+                    Objects.equals(this.vlanId, other.vlanId);
+        }
+        return false;
+    }
+
 }
 }

 package org.onlab.onos.net;
 package org.onlab.onos.net;
 
 
+import static org.onlab.onos.net.PortNumber.P0;
+
 /**
 /**
  * Representation of a network edge location where an end-station host is
  * Representation of a network edge location where an end-station host is
  * connected.
  * connected.
  */
  */
 public class HostLocation extends ConnectPoint {
 public class HostLocation extends ConnectPoint {
 
 
+    /**
+     * Represents a no location or an unknown location.
+     */
+    public static final HostLocation NONE = new HostLocation(DeviceId.NONE, P0, 0L);
+
     // Note that time is explicitly excluded from the notion of equality.
     // Note that time is explicitly excluded from the notion of equality.
     private final long time;
     private final long time;
 
 

+package org.onlab.onos.net;
+
+/**
+ * Representation of a network resource.
+ */
+public interface NetworkResource {
+}

@@ -4,6 +4,8 @@ import org.onlab.onos.net.AbstractDescription;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.SparseAnnotations;
 import org.onlab.onos.net.SparseAnnotations;
 
 
+import com.google.common.base.MoreObjects;
+
 /**
 /**
  * Default implementation of immutable port description.
  * Default implementation of immutable port description.
  */
  */
@@ -48,6 +50,15 @@ public class DefaultPortDescription extends AbstractDescription
         return isEnabled;
         return isEnabled;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("number", number)
+                .add("isEnabled", isEnabled)
+                .add("annotations", annotations())
+                .toString();
+    }
+
     // default constructor for serialization
     // default constructor for serialization
     private DefaultPortDescription() {
     private DefaultPortDescription() {
         this.number = null;
         this.number = null;

 package org.onlab.onos.net.host;
 package org.onlab.onos.net.host;
 
 
-import com.google.common.collect.ImmutableSet;
 import org.onlab.onos.net.AbstractDescription;
 import org.onlab.onos.net.AbstractDescription;
 import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.SparseAnnotations;
 import org.onlab.onos.net.SparseAnnotations;
@@ -8,9 +7,6 @@ import org.onlab.packet.IpPrefix;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.packet.VlanId;
 
 
-import java.util.HashSet;
-import java.util.Set;
-
 import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.MoreObjects.toStringHelper;
 
 
 /**
 /**
@@ -22,7 +18,7 @@ public class DefaultHostDescription extends AbstractDescription
     private final MacAddress mac;
     private final MacAddress mac;
     private final VlanId vlan;
     private final VlanId vlan;
     private final HostLocation location;
     private final HostLocation location;
-    private final Set<IpPrefix> ips;
+    private final IpPrefix ip;
 
 
     /**
     /**
      * Creates a host description using the supplied information.
      * Creates a host description using the supplied information.
@@ -35,7 +31,7 @@ public class DefaultHostDescription extends AbstractDescription
     public DefaultHostDescription(MacAddress mac, VlanId vlan,
     public DefaultHostDescription(MacAddress mac, VlanId vlan,
                                   HostLocation location,
                                   HostLocation location,
                                   SparseAnnotations... annotations) {
                                   SparseAnnotations... annotations) {
-        this(mac, vlan, location, new HashSet<IpPrefix>(), annotations);
+        this(mac, vlan, location, null, annotations);
     }
     }
 
 
     /**
     /**
@@ -44,17 +40,17 @@ public class DefaultHostDescription extends AbstractDescription
      * @param mac         host MAC address
      * @param mac         host MAC address
      * @param vlan        host VLAN identifier
      * @param vlan        host VLAN identifier
      * @param location    host location
      * @param location    host location
-     * @param ips         of host IP addresses
+     * @param ip          host IP address
      * @param annotations optional key/value annotations map
      * @param annotations optional key/value annotations map
      */
      */
     public DefaultHostDescription(MacAddress mac, VlanId vlan,
     public DefaultHostDescription(MacAddress mac, VlanId vlan,
-                                  HostLocation location, Set<IpPrefix> ips,
+                                  HostLocation location, IpPrefix ip,
                                   SparseAnnotations... annotations) {
                                   SparseAnnotations... annotations) {
         super(annotations);
         super(annotations);
         this.mac = mac;
         this.mac = mac;
         this.vlan = vlan;
         this.vlan = vlan;
         this.location = location;
         this.location = location;
-        this.ips = new HashSet<>(ips);
+        this.ip = ip;
     }
     }
 
 
     @Override
     @Override
@@ -73,8 +69,8 @@ public class DefaultHostDescription extends AbstractDescription
     }
     }
 
 
     @Override
     @Override
-    public Set<IpPrefix> ipAddresses() {
-        return ImmutableSet.copyOf(ips);
+    public IpPrefix ipAddress() {
+        return ip;
     }
     }
 
 
     @Override
     @Override
@@ -83,7 +79,7 @@ public class DefaultHostDescription extends AbstractDescription
                 .add("mac", mac)
                 .add("mac", mac)
                 .add("vlan", vlan)
                 .add("vlan", vlan)
                 .add("location", location)
                 .add("location", location)
-                .add("ipAddresses", ips)
+                .add("ipAddress", ip)
                 .toString();
                 .toString();
     }
     }
 
 

 package org.onlab.onos.net.host;
 package org.onlab.onos.net.host;
 
 
-import java.util.Set;
-
 import org.onlab.onos.net.Description;
 import org.onlab.onos.net.Description;
 import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.HostLocation;
 import org.onlab.packet.IpPrefix;
 import org.onlab.packet.IpPrefix;
@@ -35,10 +33,10 @@ public interface HostDescription extends Description {
     HostLocation location();
     HostLocation location();
 
 
     /**
     /**
-     * Returns zero or more IP address(es) associated with this host's MAC.
+     * Returns the IP address associated with this host's MAC.
      *
      *
-     * @return a set of IP addresses.
+     * @return host IP address
      */
      */
-    Set<IpPrefix> ipAddresses();
+    IpPrefix ipAddress();
 
 
 }
 }

 package org.onlab.onos.store;
 package org.onlab.onos.store;
 
 
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 
 
 //TODO: Consider renaming to DeviceClockProviderService?
 //TODO: Consider renaming to DeviceClockProviderService?
 /**
 /**
@@ -16,5 +16,5 @@ public interface ClockProviderService {
      * @param deviceId device identifier.
      * @param deviceId device identifier.
      * @param term mastership term.
      * @param term mastership term.
      */
      */
-    public void setMastershipTerm(DeviceId deviceId, DeviceMastershipTerm term);
+    public void setMastershipTerm(DeviceId deviceId, MastershipTerm term);
 }
 }

+package org.onlab.onos;
+
+import java.util.Objects;
+
+/**
+ * Test application ID.
+ */
+public class TestApplicationId implements ApplicationId {
+
+    private final String name;
+    private final short id;
+
+    public TestApplicationId(String name) {
+        this.name = name;
+        this.id = (short) Objects.hash(name);
+    }
+
+    public static ApplicationId create(String name) {
+        return new TestApplicationId(name);
+    }
+
+    @Override
+    public short id() {
+        return id;
+    }
+
+    @Override
+    public String name() {
+        return name;
+    }
+}

@@ -2,16 +2,13 @@ package org.onlab.onos.cluster;
 
 
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
-import org.onlab.onos.net.device.DeviceMastershipListener;
-import org.onlab.onos.net.device.DeviceMastershipService;
-import org.onlab.onos.net.device.DeviceMastershipTermService;
 
 
 import java.util.Set;
 import java.util.Set;
 
 
 /**
 /**
  * Test adapter for mastership service.
  * Test adapter for mastership service.
  */
  */
-public class MastershipServiceAdapter implements DeviceMastershipService {
+public class MastershipServiceAdapter implements MastershipService {
     @Override
     @Override
     public MastershipRole getLocalRole(DeviceId deviceId) {
     public MastershipRole getLocalRole(DeviceId deviceId) {
         return null;
         return null;
@@ -37,15 +34,15 @@ public class MastershipServiceAdapter implements DeviceMastershipService {
     }
     }
 
 
     @Override
     @Override
-    public void addListener(DeviceMastershipListener listener) {
+    public void addListener(MastershipListener listener) {
     }
     }
 
 
     @Override
     @Override
-    public void removeListener(DeviceMastershipListener listener) {
+    public void removeListener(MastershipListener listener) {
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipTermService requestTermService() {
+    public MastershipTermService requestTermService() {
         return null;
         return null;
     }
     }
 }
 }

@@ -3,7 +3,6 @@ package org.onlab.onos.cluster;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertEquals;
 
 
 import org.junit.Test;
 import org.junit.Test;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 
 
 import com.google.common.testing.EqualsTester;
 import com.google.common.testing.EqualsTester;
 
 
@@ -12,10 +11,10 @@ public class MastershipTermTest {
     private static final NodeId N1 = new NodeId("foo");
     private static final NodeId N1 = new NodeId("foo");
     private static final NodeId N2 = new NodeId("bar");
     private static final NodeId N2 = new NodeId("bar");
 
 
-    private static final DeviceMastershipTerm TERM1 = DeviceMastershipTerm.of(N1, 0);
-    private static final DeviceMastershipTerm TERM2 = DeviceMastershipTerm.of(N2, 1);
-    private static final DeviceMastershipTerm TERM3 = DeviceMastershipTerm.of(N2, 1);
-    private static final DeviceMastershipTerm TERM4 = DeviceMastershipTerm.of(N1, 1);
+    private static final MastershipTerm TERM1 = MastershipTerm.of(N1, 0);
+    private static final MastershipTerm TERM2 = MastershipTerm.of(N2, 1);
+    private static final MastershipTerm TERM3 = MastershipTerm.of(N2, 1);
+    private static final MastershipTerm TERM4 = MastershipTerm.of(N1, 1);
 
 
     @Test
     @Test
     public void basics() {
     public void basics() {
@@ -25,7 +24,7 @@ public class MastershipTermTest {
 
 
     @Test
     @Test
     public void testEquality() {
     public void testEquality() {
-        new EqualsTester().addEqualityGroup(DeviceMastershipTerm.of(N1, 0), TERM1)
+        new EqualsTester().addEqualityGroup(MastershipTerm.of(N1, 0), TERM1)
         .addEqualityGroup(TERM2, TERM3)
         .addEqualityGroup(TERM2, TERM3)
         .addEqualityGroup(TERM4);
         .addEqualityGroup(TERM4);
     }
     }

@@ -45,15 +45,18 @@ public class AbstractEventAccumulatorTest {
     public void timeTrigger() {
     public void timeTrigger() {
         TestAccumulator accumulator = new TestAccumulator();
         TestAccumulator accumulator = new TestAccumulator();
         accumulator.add(new TestEvent(FOO, "a"));
         accumulator.add(new TestEvent(FOO, "a"));
-        delay(40);
+        delay(30);
         assertTrue("should not have fired yet", accumulator.batch.isEmpty());
         assertTrue("should not have fired yet", accumulator.batch.isEmpty());
         accumulator.add(new TestEvent(FOO, "b"));
         accumulator.add(new TestEvent(FOO, "b"));
-        delay(40);
+        delay(30);
         assertTrue("should not have fired yet", accumulator.batch.isEmpty());
         assertTrue("should not have fired yet", accumulator.batch.isEmpty());
         accumulator.add(new TestEvent(FOO, "c"));
         accumulator.add(new TestEvent(FOO, "c"));
-        delay(40);
+        delay(30);
+        assertTrue("should not have fired yet", accumulator.batch.isEmpty());
+        accumulator.add(new TestEvent(FOO, "d"));
+        delay(30);
         assertFalse("should have fired", accumulator.batch.isEmpty());
         assertFalse("should have fired", accumulator.batch.isEmpty());
-        assertEquals("incorrect batch", "abc", accumulator.batch);
+        assertEquals("incorrect batch", "abcd", accumulator.batch);
     }
     }
 
 
     @Test
     @Test

@@ -18,8 +18,8 @@ public class DefaultEdgeLinkTest {
 
 
     private static final ProviderId PID = new ProviderId("of", "foo");
     private static final ProviderId PID = new ProviderId("of", "foo");
     private static final DeviceId DID1 = deviceId("of:foo");
     private static final DeviceId DID1 = deviceId("of:foo");
-    private static final HostId HID1 = hostId("nic:foobar");
-    private static final HostId HID2 = hostId("nic:barfoo");
+    private static final HostId HID1 = hostId("00:00:00:00:00:01/-1");
+    private static final HostId HID2 = hostId("00:00:00:00:00:01/-1");
     private static final PortNumber P0 = portNumber(0);
     private static final PortNumber P0 = portNumber(0);
     private static final PortNumber P1 = portNumber(1);
     private static final PortNumber P1 = portNumber(1);
 
 
@@ -35,12 +35,8 @@ public class DefaultEdgeLinkTest {
         EdgeLink l4 = new DefaultEdgeLink(PID, cp(HID2, P0),
         EdgeLink l4 = new DefaultEdgeLink(PID, cp(HID2, P0),
                                           new HostLocation(DID1, P1, 123L), false);
                                           new HostLocation(DID1, P1, 123L), false);
 
 
-        EdgeLink l5 = new DefaultEdgeLink(PID, cp(HID1, P0),
-                                          new HostLocation(DID1, P1, 123L), false);
-
         new EqualsTester().addEqualityGroup(l1, l2)
         new EqualsTester().addEqualityGroup(l1, l2)
                 .addEqualityGroup(l3, l4)
                 .addEqualityGroup(l3, l4)
-                .addEqualityGroup(l5)
                 .testEquals();
                 .testEquals();
     }
     }
 
 

@@ -8,7 +8,7 @@ import static org.onlab.onos.net.DeviceId.deviceId;
 /**
 /**
  * Test of the device identifier.
  * Test of the device identifier.
  */
  */
-public class DeviceIdTest extends ElementIdTest {
+public class DeviceIdTest {
 
 
     @Test
     @Test
     public void basics() {
     public void basics() {

-package org.onlab.onos.net;
-
-import com.google.common.testing.EqualsTester;
-import org.junit.Test;
-
-import java.net.URI;
-
-import static org.junit.Assert.assertEquals;
-
-/**
- * Test of the network element identifier.
- */
-public class ElementIdTest {
-
-    private static class FooId extends ElementId {
-        public FooId(URI uri) {
-            super(uri);
-        }
-    }
-
-    public static URI uri(String str) {
-        return URI.create(str);
-    }
-
-    @Test
-    public void basics() {
-        new EqualsTester()
-                .addEqualityGroup(new FooId(uri("of:foo")),
-                                  new FooId(uri("of:foo")))
-                .addEqualityGroup(new FooId(uri("of:bar")))
-                .testEquals();
-        assertEquals("wrong uri", uri("ofcfg:foo"),
-                     new FooId(uri("ofcfg:foo")).uri());
-    }
-
-}

@@ -11,20 +11,18 @@ import static org.onlab.onos.net.HostId.hostId;
 /**
 /**
  * Test for the host identifier.
  * Test for the host identifier.
  */
  */
-public class HostIdTest extends ElementIdTest {
+public class HostIdTest {
 
 
     private static final MacAddress MAC1 = MacAddress.valueOf("00:11:00:00:00:01");
     private static final MacAddress MAC1 = MacAddress.valueOf("00:11:00:00:00:01");
     private static final MacAddress MAC2 = MacAddress.valueOf("00:22:00:00:00:02");
     private static final MacAddress MAC2 = MacAddress.valueOf("00:22:00:00:00:02");
     private static final VlanId VLAN1 = VlanId.vlanId((short) 11);
     private static final VlanId VLAN1 = VlanId.vlanId((short) 11);
     private static final VlanId VLAN2 = VlanId.vlanId((short) 22);
     private static final VlanId VLAN2 = VlanId.vlanId((short) 22);
 
 
-    @Override
     @Test
     @Test
     public void basics() {
     public void basics() {
         new EqualsTester()
         new EqualsTester()
-                .addEqualityGroup(hostId("nic:00:11:00:00:00:01-11"),
-                                  hostId(MAC1, VLAN1))
-                .addEqualityGroup(hostId(MAC2, VLAN2))
+                .addEqualityGroup(hostId(MAC1, VLAN1), hostId(MAC1, VLAN1))
+                .addEqualityGroup(hostId(MAC2, VLAN2), hostId(MAC2, VLAN2))
                 .testEquals();
                 .testEquals();
     }
     }
 
 

@@ -31,7 +31,7 @@ public final class NetTestTools {
 
 
     // Short-hand for producing a host id from a string
     // Short-hand for producing a host id from a string
     public static HostId hid(String id) {
     public static HostId hid(String id) {
-        return hostId("nic:" + id);
+        return hostId(id);
     }
     }
 
 
     // Crates a new device with the specified id
     // Crates a new device with the specified id

@@ -10,9 +10,8 @@ import com.google.common.testing.EqualsTester;
 /**
 /**
  * Test of the port number.
  * Test of the port number.
  */
  */
-public class PortNumberTest extends ElementIdTest {
+public class PortNumberTest {
 
 
-    @Override
     @Test
     @Test
     public void basics() {
     public void basics() {
         new EqualsTester()
         new EqualsTester()

 package org.onlab.onos.net.host;
 package org.onlab.onos.net.host;
 
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-import java.util.Set;
-
 import org.junit.Test;
 import org.junit.Test;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.HostLocation;
@@ -13,7 +8,8 @@ import org.onlab.packet.IpPrefix;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.packet.VlanId;
 
 
-import com.google.common.collect.Sets;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 
 /**
 /**
  * Test for the default host description.
  * Test for the default host description.
@@ -22,24 +18,22 @@ public class DefualtHostDecriptionTest {
 
 
     private static final MacAddress MAC = MacAddress.valueOf("00:00:11:00:00:01");
     private static final MacAddress MAC = MacAddress.valueOf("00:00:11:00:00:01");
     private static final VlanId VLAN = VlanId.vlanId((short) 10);
     private static final VlanId VLAN = VlanId.vlanId((short) 10);
+    private static final IpPrefix IP = IpPrefix.valueOf("10.0.0.1");
+
     private static final HostLocation LOC = new HostLocation(
     private static final HostLocation LOC = new HostLocation(
             DeviceId.deviceId("of:foo"),
             DeviceId.deviceId("of:foo"),
             PortNumber.portNumber(100),
             PortNumber.portNumber(100),
             123L
             123L
     );
     );
-    private static final Set<IpPrefix> IPS = Sets.newHashSet(
-                IpPrefix.valueOf("10.0.0.1"),
-                IpPrefix.valueOf("10.0.0.2")
-            );
 
 
     @Test
     @Test
     public void basics() {
     public void basics() {
         HostDescription host =
         HostDescription host =
-                new DefaultHostDescription(MAC, VLAN, LOC, IPS);
+                new DefaultHostDescription(MAC, VLAN, LOC, IP);
         assertEquals("incorrect mac", MAC, host.hwAddress());
         assertEquals("incorrect mac", MAC, host.hwAddress());
         assertEquals("incorrect vlan", VLAN, host.vlan());
         assertEquals("incorrect vlan", VLAN, host.vlan());
         assertEquals("incorrect location", LOC, host.location());
         assertEquals("incorrect location", LOC, host.location());
-        assertTrue("incorrect ip's", IPS.equals(host.ipAddresses()));
+        assertEquals("incorrect ip's", IP, host.ipAddress());
         assertTrue("incorrect toString", host.toString().contains("vlan=10"));
         assertTrue("incorrect toString", host.toString().contains("vlan=10"));
     }
     }
 
 

@@ -14,25 +14,25 @@ import org.apache.felix.scr.annotations.Service;
 import org.onlab.onos.cluster.ClusterEvent;
 import org.onlab.onos.cluster.ClusterEvent;
 import org.onlab.onos.cluster.ClusterEventListener;
 import org.onlab.onos.cluster.ClusterEventListener;
 import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ClusterService;
+import org.onlab.onos.cluster.MastershipAdminService;
+import org.onlab.onos.cluster.MastershipEvent;
+import org.onlab.onos.cluster.MastershipListener;
+import org.onlab.onos.cluster.MastershipService;
+import org.onlab.onos.cluster.MastershipStore;
+import org.onlab.onos.cluster.MastershipStoreDelegate;
+import org.onlab.onos.cluster.MastershipTerm;
+import org.onlab.onos.cluster.MastershipTermService;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.event.AbstractListenerRegistry;
 import org.onlab.onos.event.AbstractListenerRegistry;
 import org.onlab.onos.event.EventDeliveryService;
 import org.onlab.onos.event.EventDeliveryService;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
-import org.onlab.onos.net.device.DeviceMastershipAdminService;
-import org.onlab.onos.net.device.DeviceMastershipEvent;
-import org.onlab.onos.net.device.DeviceMastershipListener;
-import org.onlab.onos.net.device.DeviceMastershipService;
-import org.onlab.onos.net.device.DeviceMastershipStore;
-import org.onlab.onos.net.device.DeviceMastershipStoreDelegate;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
-import org.onlab.onos.net.device.DeviceMastershipTermService;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 
 
 @Component(immediate = true)
 @Component(immediate = true)
 @Service
 @Service
 public class MastershipManager
 public class MastershipManager
-implements DeviceMastershipService, DeviceMastershipAdminService {
+implements MastershipService, MastershipAdminService {
 
 
     private static final String NODE_ID_NULL = "Node ID cannot be null";
     private static final String NODE_ID_NULL = "Node ID cannot be null";
     private static final String DEVICE_ID_NULL = "Device ID cannot be null";
     private static final String DEVICE_ID_NULL = "Device ID cannot be null";
@@ -40,13 +40,13 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
     private final Logger log = getLogger(getClass());
     private final Logger log = getLogger(getClass());
 
 
-    protected final AbstractListenerRegistry<DeviceMastershipEvent, DeviceMastershipListener>
+    protected final AbstractListenerRegistry<MastershipEvent, MastershipListener>
     listenerRegistry = new AbstractListenerRegistry<>();
     listenerRegistry = new AbstractListenerRegistry<>();
 
 
-    private final DeviceMastershipStoreDelegate delegate = new InternalDelegate();
+    private final MastershipStoreDelegate delegate = new InternalDelegate();
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
-    protected DeviceMastershipStore store;
+    protected MastershipStore store;
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected EventDeliveryService eventDispatcher;
     protected EventDeliveryService eventDispatcher;
@@ -58,7 +58,7 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
     @Activate
     @Activate
     public void activate() {
     public void activate() {
-        eventDispatcher.addSink(DeviceMastershipEvent.class, listenerRegistry);
+        eventDispatcher.addSink(MastershipEvent.class, listenerRegistry);
         clusterService.addListener(clusterListener);
         clusterService.addListener(clusterListener);
         store.setDelegate(delegate);
         store.setDelegate(delegate);
         log.info("Started");
         log.info("Started");
@@ -66,7 +66,7 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
     @Deactivate
     @Deactivate
     public void deactivate() {
     public void deactivate() {
-        eventDispatcher.removeSink(DeviceMastershipEvent.class);
+        eventDispatcher.removeSink(MastershipEvent.class);
         clusterService.removeListener(clusterListener);
         clusterService.removeListener(clusterListener);
         store.unsetDelegate(delegate);
         store.unsetDelegate(delegate);
         log.info("Stopped");
         log.info("Stopped");
@@ -78,7 +78,7 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
         checkNotNull(deviceId, DEVICE_ID_NULL);
         checkNotNull(deviceId, DEVICE_ID_NULL);
         checkNotNull(role, ROLE_NULL);
         checkNotNull(role, ROLE_NULL);
 
 
-        DeviceMastershipEvent event = null;
+        MastershipEvent event = null;
         if (role.equals(MastershipRole.MASTER)) {
         if (role.equals(MastershipRole.MASTER)) {
             event = store.setMaster(nodeId, deviceId);
             event = store.setMaster(nodeId, deviceId);
         } else {
         } else {
@@ -98,7 +98,7 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
     @Override
     @Override
     public void relinquishMastership(DeviceId deviceId) {
     public void relinquishMastership(DeviceId deviceId) {
-        DeviceMastershipEvent event = null;
+        MastershipEvent event = null;
         event = store.relinquishRole(
         event = store.relinquishRole(
                 clusterService.getLocalNode().id(), deviceId);
                 clusterService.getLocalNode().id(), deviceId);
 
 
@@ -127,18 +127,18 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
 
 
     @Override
     @Override
-    public DeviceMastershipTermService requestTermService() {
+    public MastershipTermService requestTermService() {
         return new InternalMastershipTermService();
         return new InternalMastershipTermService();
     }
     }
 
 
     @Override
     @Override
-    public void addListener(DeviceMastershipListener listener) {
+    public void addListener(MastershipListener listener) {
         checkNotNull(listener);
         checkNotNull(listener);
         listenerRegistry.addListener(listener);
         listenerRegistry.addListener(listener);
     }
     }
 
 
     @Override
     @Override
-    public void removeListener(DeviceMastershipListener listener) {
+    public void removeListener(MastershipListener listener) {
         checkNotNull(listener);
         checkNotNull(listener);
         listenerRegistry.removeListener(listener);
         listenerRegistry.removeListener(listener);
     }
     }
@@ -146,16 +146,16 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
     // FIXME: provide wiring to allow events to be triggered by changes within the store
     // FIXME: provide wiring to allow events to be triggered by changes within the store
 
 
     // Posts the specified event to the local event dispatcher.
     // Posts the specified event to the local event dispatcher.
-    private void post(DeviceMastershipEvent event) {
+    private void post(MastershipEvent event) {
         if (event != null && eventDispatcher != null) {
         if (event != null && eventDispatcher != null) {
             eventDispatcher.post(event);
             eventDispatcher.post(event);
         }
         }
     }
     }
 
 
-    private class InternalMastershipTermService implements DeviceMastershipTermService {
+    private class InternalMastershipTermService implements MastershipTermService {
 
 
         @Override
         @Override
-        public DeviceMastershipTerm getMastershipTerm(DeviceId deviceId) {
+        public MastershipTerm getMastershipTerm(DeviceId deviceId) {
             return store.getTermFor(deviceId);
             return store.getTermFor(deviceId);
         }
         }
 
 
@@ -181,10 +181,10 @@ implements DeviceMastershipService, DeviceMastershipAdminService {
 
 
     }
     }
 
 
-    public class InternalDelegate implements DeviceMastershipStoreDelegate {
+    public class InternalDelegate implements MastershipStoreDelegate {
 
 
         @Override
         @Override
-        public void notify(DeviceMastershipEvent event) {
+        public void notify(MastershipEvent event) {
             log.info("dispatching mastership event {}", event);
             log.info("dispatching mastership event {}", event);
             eventDispatcher.post(event);
             eventDispatcher.post(event);
         }
         }

@@ -13,6 +13,11 @@ import org.apache.felix.scr.annotations.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
 import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ClusterService;
+import org.onlab.onos.cluster.MastershipEvent;
+import org.onlab.onos.cluster.MastershipListener;
+import org.onlab.onos.cluster.MastershipService;
+import org.onlab.onos.cluster.MastershipTermService;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.event.AbstractListenerRegistry;
 import org.onlab.onos.event.AbstractListenerRegistry;
 import org.onlab.onos.event.EventDeliveryService;
 import org.onlab.onos.event.EventDeliveryService;
@@ -31,11 +36,6 @@ import org.onlab.onos.net.device.DeviceProviderService;
 import org.onlab.onos.net.device.DeviceService;
 import org.onlab.onos.net.device.DeviceService;
 import org.onlab.onos.net.device.DeviceStore;
 import org.onlab.onos.net.device.DeviceStore;
 import org.onlab.onos.net.device.DeviceStoreDelegate;
 import org.onlab.onos.net.device.DeviceStoreDelegate;
-import org.onlab.onos.net.device.DeviceMastershipEvent;
-import org.onlab.onos.net.device.DeviceMastershipListener;
-import org.onlab.onos.net.device.DeviceMastershipService;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
-import org.onlab.onos.net.device.DeviceMastershipTermService;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.AbstractProviderRegistry;
 import org.onlab.onos.net.provider.AbstractProviderRegistry;
 import org.onlab.onos.net.provider.AbstractProviderService;
 import org.onlab.onos.net.provider.AbstractProviderService;
@@ -64,7 +64,7 @@ public class DeviceManager
 
 
     private final DeviceStoreDelegate delegate = new InternalStoreDelegate();
     private final DeviceStoreDelegate delegate = new InternalStoreDelegate();
 
 
-    private final DeviceMastershipListener mastershipListener = new InternalMastershipListener();
+    private final MastershipListener mastershipListener = new InternalMastershipListener();
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected DeviceStore store;
     protected DeviceStore store;
@@ -76,9 +76,9 @@ public class DeviceManager
     protected ClusterService clusterService;
     protected ClusterService clusterService;
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
-    protected DeviceMastershipService mastershipService;
+    protected MastershipService mastershipService;
 
 
-    protected DeviceMastershipTermService termService;
+    protected MastershipTermService termService;
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected ClockProviderService clockProviderService;
     protected ClockProviderService clockProviderService;
@@ -209,7 +209,7 @@ public class DeviceManager
                 return;
                 return;
             }
             }
 
 
-            DeviceMastershipTerm term = mastershipService.requestTermService()
+            MastershipTerm term = mastershipService.requestTermService()
                     .getMastershipTerm(deviceId);
                     .getMastershipTerm(deviceId);
             if (!term.master().equals(clusterService.getLocalNode().id())) {
             if (!term.master().equals(clusterService.getLocalNode().id())) {
                 // lost mastership after requestRole told this instance was MASTER.
                 // lost mastership after requestRole told this instance was MASTER.
@@ -320,16 +320,16 @@ public class DeviceManager
     }
     }
 
 
     // Intercepts mastership events
     // Intercepts mastership events
-    private class InternalMastershipListener implements DeviceMastershipListener {
+    private class InternalMastershipListener implements MastershipListener {
 
 
         @Override
         @Override
-        public void event(DeviceMastershipEvent event) {
+        public void event(MastershipEvent event) {
             final DeviceId did = event.subject();
             final DeviceId did = event.subject();
             if (isAvailable(did)) {
             if (isAvailable(did)) {
                 final NodeId myNodeId = clusterService.getLocalNode().id();
                 final NodeId myNodeId = clusterService.getLocalNode().id();
 
 
                 if (myNodeId.equals(event.master())) {
                 if (myNodeId.equals(event.master())) {
-                    DeviceMastershipTerm term = termService.getMastershipTerm(did);
+                    MastershipTerm term = termService.getMastershipTerm(did);
 
 
                     if (term.master().equals(myNodeId)) {
                     if (term.master().equals(myNodeId)) {
                         // only set the new term if I am the master
                         // only set the new term if I am the master

@@ -168,7 +168,6 @@ public class HostManager
         checkNotNull(hostId, HOST_ID_NULL);
         checkNotNull(hostId, HOST_ID_NULL);
         HostEvent event = store.removeHost(hostId);
         HostEvent event = store.removeHost(hostId);
         if (event != null) {
         if (event != null) {
-            log.info("Host {} administratively removed", hostId);
             post(event);
             post(event);
         }
         }
     }
     }
@@ -214,7 +213,6 @@ public class HostManager
             HostEvent event = store.createOrUpdateHost(provider().id(), hostId,
             HostEvent event = store.createOrUpdateHost(provider().id(), hostId,
                                                        hostDescription);
                                                        hostDescription);
             if (event != null) {
             if (event != null) {
-                log.debug("Host {} detected", hostId);
                 post(event);
                 post(event);
             }
             }
         }
         }
@@ -225,7 +223,6 @@ public class HostManager
             checkValidity();
             checkValidity();
             HostEvent event = store.removeHost(hostId);
             HostEvent event = store.removeHost(hostId);
             if (event != null) {
             if (event != null) {
-                log.debug("Host {} vanished", hostId);
                 post(event);
                 post(event);
             }
             }
         }
         }

@@ -22,9 +22,9 @@ import org.onlab.onos.net.Link;
 import org.onlab.onos.net.Path;
 import org.onlab.onos.net.Path;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.host.HostService;
 import org.onlab.onos.net.host.HostService;
-import org.onlab.onos.net.topology.PathService;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.topology.LinkWeight;
 import org.onlab.onos.net.topology.LinkWeight;
+import org.onlab.onos.net.topology.PathService;
 import org.onlab.onos.net.topology.Topology;
 import org.onlab.onos.net.topology.Topology;
 import org.onlab.onos.net.topology.TopologyService;
 import org.onlab.onos.net.topology.TopologyService;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
@@ -33,7 +33,6 @@ import java.util.List;
 import java.util.Set;
 import java.util.Set;
 
 
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Preconditions.checkNotNull;
-import static org.onlab.onos.net.DeviceId.deviceId;
 import static org.slf4j.LoggerFactory.getLogger;
 import static org.slf4j.LoggerFactory.getLogger;
 
 
 /**
 /**
@@ -162,8 +161,8 @@ public class PathManager implements PathService {
     // edge link since the src or dst are really an infrastructure device.
     // edge link since the src or dst are really an infrastructure device.
     private static class NotHost extends DefaultEdgeLink implements EdgeLink {
     private static class NotHost extends DefaultEdgeLink implements EdgeLink {
         NotHost() {
         NotHost() {
-            super(PID, new ConnectPoint(HostId.hostId("nic:none"), P0),
-                  new HostLocation(deviceId("none:none"), P0, 0L), false);
+            super(PID, new ConnectPoint(HostId.NONE, P0),
+                  new HostLocation(DeviceId.NONE, P0, 0L), false);
         }
         }
     }
     }
 }
 }

@@ -10,11 +10,11 @@ import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
+import org.onlab.onos.cluster.MastershipService;
+import org.onlab.onos.cluster.MastershipTermService;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.event.impl.TestEventDispatcher;
 import org.onlab.onos.event.impl.TestEventDispatcher;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipService;
-import org.onlab.onos.net.device.DeviceMastershipTermService;
 import org.onlab.onos.store.trivial.impl.SimpleMastershipStore;
 import org.onlab.onos.store.trivial.impl.SimpleMastershipStore;
 import org.onlab.packet.IpPrefix;
 import org.onlab.packet.IpPrefix;
 
 
@@ -34,7 +34,7 @@ public class MastershipManagerTest {
     private static final DeviceId DEV_OTHER = DeviceId.deviceId("of:2");
     private static final DeviceId DEV_OTHER = DeviceId.deviceId("of:2");
 
 
     private MastershipManager mgr;
     private MastershipManager mgr;
-    protected DeviceMastershipService service;
+    protected MastershipService service;
 
 
     @Before
     @Before
     public void setUp() {
     public void setUp() {
@@ -120,7 +120,7 @@ public class MastershipManagerTest {
 
 
     @Test
     @Test
     public void termService() {
     public void termService() {
-        DeviceMastershipTermService ts = mgr.requestTermService();
+        MastershipTermService ts = mgr.requestTermService();
 
 
         //term = 0 for both
         //term = 0 for both
         mgr.setRole(NID_LOCAL, DEV_MASTER, MASTER);
         mgr.setRole(NID_LOCAL, DEV_MASTER, MASTER);

@@ -11,6 +11,8 @@ import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.MastershipServiceAdapter;
 import org.onlab.onos.cluster.MastershipServiceAdapter;
+import org.onlab.onos.cluster.MastershipTerm;
+import org.onlab.onos.cluster.MastershipTermService;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.event.Event;
 import org.onlab.onos.event.Event;
@@ -30,8 +32,6 @@ import org.onlab.onos.net.device.DeviceProvider;
 import org.onlab.onos.net.device.DeviceProviderRegistry;
 import org.onlab.onos.net.device.DeviceProviderRegistry;
 import org.onlab.onos.net.device.DeviceProviderService;
 import org.onlab.onos.net.device.DeviceProviderService;
 import org.onlab.onos.net.device.DeviceService;
 import org.onlab.onos.net.device.DeviceService;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
-import org.onlab.onos.net.device.DeviceMastershipTermService;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.AbstractProvider;
 import org.onlab.onos.net.provider.AbstractProvider;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
@@ -290,12 +290,12 @@ public class DeviceManagerTest {
         }
         }
 
 
         @Override
         @Override
-        public DeviceMastershipTermService requestTermService() {
-            return new DeviceMastershipTermService() {
+        public MastershipTermService requestTermService() {
+            return new MastershipTermService() {
                 @Override
                 @Override
-                public DeviceMastershipTerm getMastershipTerm(DeviceId deviceId) {
+                public MastershipTerm getMastershipTerm(DeviceId deviceId) {
                     // FIXME: just returning something not null
                     // FIXME: just returning something not null
-                    return DeviceMastershipTerm.of(NID_LOCAL, 1);
+                    return MastershipTerm.of(NID_LOCAL, 1);
                 }
                 }
             };
             };
         }
         }
@@ -339,7 +339,7 @@ public class DeviceManagerTest {
             ClockProviderService {
             ClockProviderService {
 
 
         @Override
         @Override
-        public void setMastershipTerm(DeviceId deviceId, DeviceMastershipTerm term) {
+        public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) {
             // TODO Auto-generated method stub
             // TODO Auto-generated method stub
         }
         }
     }
     }

@@ -58,8 +58,6 @@ public class HostManagerTest {
 
 
     private static final IpPrefix IP1 = IpPrefix.valueOf("10.0.0.1");
     private static final IpPrefix IP1 = IpPrefix.valueOf("10.0.0.1");
     private static final IpPrefix IP2 = IpPrefix.valueOf("10.0.0.2");
     private static final IpPrefix IP2 = IpPrefix.valueOf("10.0.0.2");
-    private static final Set<IpPrefix> IPSET1 = Sets.newHashSet(IP1);
-    private static final Set<IpPrefix> IPSET2 = Sets.newHashSet(IP2);
 
 
     private static final DeviceId DID1 = DeviceId.deviceId("of:001");
     private static final DeviceId DID1 = DeviceId.deviceId("of:001");
     private static final DeviceId DID2 = DeviceId.deviceId("of:002");
     private static final DeviceId DID2 = DeviceId.deviceId("of:002");
@@ -109,8 +107,8 @@ public class HostManagerTest {
     }
     }
 
 
     private void detect(HostId hid, MacAddress mac, VlanId vlan,
     private void detect(HostId hid, MacAddress mac, VlanId vlan,
-            HostLocation loc, Set<IpPrefix> ips) {
-        HostDescription descr = new DefaultHostDescription(mac, vlan, loc, ips);
+                        HostLocation loc, IpPrefix ip) {
+        HostDescription descr = new DefaultHostDescription(mac, vlan, loc, ip);
         providerService.hostDetected(hid, descr);
         providerService.hostDetected(hid, descr);
         assertNotNull("host should be found", mgr.getHost(hid));
         assertNotNull("host should be found", mgr.getHost(hid));
     }
     }
@@ -130,26 +128,26 @@ public class HostManagerTest {
         assertNull("host shouldn't be found", mgr.getHost(HID1));
         assertNull("host shouldn't be found", mgr.getHost(HID1));
 
 
         // host addition
         // host addition
-        detect(HID1, MAC1, VLAN1, LOC1, IPSET1);
+        detect(HID1, MAC1, VLAN1, LOC1, IP1);
         assertEquals("exactly one should be found", 1, mgr.getHostCount());
         assertEquals("exactly one should be found", 1, mgr.getHostCount());
-        detect(HID2, MAC2, VLAN2, LOC2, IPSET1);
+        detect(HID2, MAC2, VLAN2, LOC2, IP1);
         assertEquals("two hosts should be found", 2, mgr.getHostCount());
         assertEquals("two hosts should be found", 2, mgr.getHostCount());
         validateEvents(HOST_ADDED, HOST_ADDED);
         validateEvents(HOST_ADDED, HOST_ADDED);
 
 
         // host motion
         // host motion
-        detect(HID1, MAC1, VLAN1, LOC2, IPSET1);
+        detect(HID1, MAC1, VLAN1, LOC2, IP1);
         validateEvents(HOST_MOVED);
         validateEvents(HOST_MOVED);
         assertEquals("only two hosts should be found", 2, mgr.getHostCount());
         assertEquals("only two hosts should be found", 2, mgr.getHostCount());
 
 
         // host update
         // host update
-        detect(HID1, MAC1, VLAN1, LOC2, IPSET2);
+        detect(HID1, MAC1, VLAN1, LOC2, IP2);
         validateEvents(HOST_UPDATED);
         validateEvents(HOST_UPDATED);
         assertEquals("only two hosts should be found", 2, mgr.getHostCount());
         assertEquals("only two hosts should be found", 2, mgr.getHostCount());
     }
     }
 
 
     @Test
     @Test
     public void hostVanished() {
     public void hostVanished() {
-        detect(HID1, MAC1, VLAN1, LOC1, IPSET1);
+        detect(HID1, MAC1, VLAN1, LOC1, IP1);
         providerService.hostVanished(HID1);
         providerService.hostVanished(HID1);
         validateEvents(HOST_ADDED, HOST_REMOVED);
         validateEvents(HOST_ADDED, HOST_REMOVED);
 
 
@@ -157,7 +155,7 @@ public class HostManagerTest {
     }
     }
 
 
     private void validateHosts(
     private void validateHosts(
-            String msg, Iterable<Host> hosts, HostId ... ids) {
+            String msg, Iterable<Host> hosts, HostId... ids) {
         Set<HostId> hids = Sets.newHashSet(ids);
         Set<HostId> hids = Sets.newHashSet(ids);
         for (Host h : hosts) {
         for (Host h : hosts) {
             assertTrue(msg, hids.remove(h.id()));
             assertTrue(msg, hids.remove(h.id()));
@@ -167,8 +165,8 @@ public class HostManagerTest {
 
 
     @Test
     @Test
     public void getHosts() {
     public void getHosts() {
-        detect(HID1, MAC1, VLAN1, LOC1, IPSET1);
-        detect(HID2, MAC2, VLAN1, LOC2, IPSET2);
+        detect(HID1, MAC1, VLAN1, LOC1, IP1);
+        detect(HID2, MAC2, VLAN1, LOC2, IP2);
 
 
         validateHosts("host not properly stored", mgr.getHosts(), HID1, HID2);
         validateHosts("host not properly stored", mgr.getHosts(), HID1, HID2);
         validateHosts("can't get hosts by VLAN", mgr.getHostsByVlan(VLAN1), HID1, HID2);
         validateHosts("can't get hosts by VLAN", mgr.getHostsByVlan(VLAN1), HID1, HID2);

@@ -65,47 +65,48 @@ public class PathManagerTest {
     @Test
     @Test
     public void infraToEdge() {
     public void infraToEdge() {
         DeviceId src = did("src");
         DeviceId src = did("src");
-        HostId dst = hid("dst");
+        HostId dst = hid("12:34:56:78:90:ab/1");
         fakeTopoMgr.paths.add(createPath("src", "middle", "edge"));
         fakeTopoMgr.paths.add(createPath("src", "middle", "edge"));
-        fakeHostMgr.hosts.put(dst, host("dst", "edge"));
+        fakeHostMgr.hosts.put(dst, host("12:34:56:78:90:ab/1", "edge"));
         Set<Path> paths = service.getPaths(src, dst);
         Set<Path> paths = service.getPaths(src, dst);
         validatePaths(paths, 1, 3, src, dst);
         validatePaths(paths, 1, 3, src, dst);
     }
     }
 
 
     @Test
     @Test
     public void edgeToInfra() {
     public void edgeToInfra() {
-        HostId src = hid("src");
+        HostId src = hid("12:34:56:78:90:ab/1");
         DeviceId dst = did("dst");
         DeviceId dst = did("dst");
         fakeTopoMgr.paths.add(createPath("edge", "middle", "dst"));
         fakeTopoMgr.paths.add(createPath("edge", "middle", "dst"));
-        fakeHostMgr.hosts.put(src, host("src", "edge"));
+        fakeHostMgr.hosts.put(src, host("12:34:56:78:90:ab/1", "edge"));
         Set<Path> paths = service.getPaths(src, dst);
         Set<Path> paths = service.getPaths(src, dst);
         validatePaths(paths, 1, 3, src, dst);
         validatePaths(paths, 1, 3, src, dst);
     }
     }
 
 
     @Test
     @Test
     public void edgeToEdge() {
     public void edgeToEdge() {
-        HostId src = hid("src");
-        HostId dst = hid("dst");
+        HostId src = hid("12:34:56:78:90:ab/1");
+        HostId dst = hid("12:34:56:78:90:ef/1");
         fakeTopoMgr.paths.add(createPath("srcEdge", "middle", "dstEdge"));
         fakeTopoMgr.paths.add(createPath("srcEdge", "middle", "dstEdge"));
-        fakeHostMgr.hosts.put(src, host("src", "srcEdge"));
-        fakeHostMgr.hosts.put(dst, host("dst", "dstEdge"));
+        fakeHostMgr.hosts.put(src, host("12:34:56:78:90:ab/1", "srcEdge"));
+        fakeHostMgr.hosts.put(dst, host("12:34:56:78:90:ef/1", "dstEdge"));
         Set<Path> paths = service.getPaths(src, dst);
         Set<Path> paths = service.getPaths(src, dst);
         validatePaths(paths, 1, 4, src, dst);
         validatePaths(paths, 1, 4, src, dst);
     }
     }
 
 
     @Test
     @Test
     public void edgeToEdgeDirect() {
     public void edgeToEdgeDirect() {
-        HostId src = hid("src");
-        HostId dst = hid("dst");
-        fakeHostMgr.hosts.put(src, host("src", "edge"));
-        fakeHostMgr.hosts.put(dst, host("dst", "edge"));
+        HostId src = hid("12:34:56:78:90:ab/1");
+        HostId dst = hid("12:34:56:78:90:ef/1");
+        fakeHostMgr.hosts.put(src, host("12:34:56:78:90:ab/1", "edge"));
+        fakeHostMgr.hosts.put(dst, host("12:34:56:78:90:ef/1", "edge"));
         Set<Path> paths = service.getPaths(src, dst);
         Set<Path> paths = service.getPaths(src, dst);
         validatePaths(paths, 1, 2, src, dst);
         validatePaths(paths, 1, 2, src, dst);
     }
     }
 
 
     @Test
     @Test
     public void noEdge() {
     public void noEdge() {
-        Set<Path> paths = service.getPaths(hid("src"), hid("dst"));
+        Set<Path> paths = service.getPaths(hid("12:34:56:78:90:ab/1"),
+                                           hid("12:34:56:78:90:ef/1"));
         assertTrue("there should be no paths", paths.isEmpty());
         assertTrue("there should be no paths", paths.isEmpty());
     }
     }
 
 

@@ -134,11 +134,11 @@ public class TopologyManagerTest {
                     service.isInfrastructure(topology, new ConnectPoint(did("a"), portNumber(3))));
                     service.isInfrastructure(topology, new ConnectPoint(did("a"), portNumber(3))));
 
 
         // One of these cannot be a broadcast point... or we have a loop...
         // One of these cannot be a broadcast point... or we have a loop...
-        assertFalse("should not be broadcast point",
-                    service.isBroadcastPoint(topology, new ConnectPoint(did("a"), portNumber(1))) &&
-                            service.isBroadcastPoint(topology, new ConnectPoint(did("b"), portNumber(1))) &&
-                            service.isBroadcastPoint(topology, new ConnectPoint(did("c"), portNumber(1))) &&
-                            service.isBroadcastPoint(topology, new ConnectPoint(did("d"), portNumber(1))));
+//        assertFalse("should not be broadcast point",
+//                    service.isBroadcastPoint(topology, new ConnectPoint(did("a"), portNumber(1))) &&
+//                            service.isBroadcastPoint(topology, new ConnectPoint(did("b"), portNumber(1))) &&
+//                            service.isBroadcastPoint(topology, new ConnectPoint(did("c"), portNumber(1))) &&
+//                            service.isBroadcastPoint(topology, new ConnectPoint(did("d"), portNumber(1))));
         assertTrue("should be broadcast point",
         assertTrue("should be broadcast point",
                    service.isBroadcastPoint(topology, new ConnectPoint(did("a"), portNumber(3))));
                    service.isBroadcastPoint(topology, new ConnectPoint(did("a"), portNumber(3))));
     }
     }

@@ -54,8 +54,13 @@
             <artifactId>org.apache.felix.scr.annotations</artifactId>
             <artifactId>org.apache.felix.scr.annotations</artifactId>
         </dependency>
         </dependency>
         <dependency>
         <dependency>
-          <groupId>de.javakaffee</groupId>
-          <artifactId>kryo-serializers</artifactId>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava-testlib</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
         </dependency>
         </dependency>
     </dependencies>
     </dependencies>
 
 

@@ -6,7 +6,6 @@ import java.io.IOException;
 import java.util.Set;
 import java.util.Set;
 import java.util.Timer;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.TimerTask;
-
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Deactivate;
@@ -24,8 +23,10 @@ import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService;
 import org.onlab.onos.store.cluster.messaging.ClusterMessage;
 import org.onlab.onos.store.cluster.messaging.ClusterMessage;
 import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler;
 import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler;
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
+import org.onlab.onos.store.serializers.ClusterMessageSerializer;
 import org.onlab.onos.store.serializers.KryoPoolUtil;
 import org.onlab.onos.store.serializers.KryoPoolUtil;
 import org.onlab.onos.store.serializers.KryoSerializer;
 import org.onlab.onos.store.serializers.KryoSerializer;
+import org.onlab.onos.store.serializers.MessageSubjectSerializer;
 import org.onlab.util.KryoPool;
 import org.onlab.util.KryoPool;
 import org.onlab.netty.Endpoint;
 import org.onlab.netty.Endpoint;
 import org.onlab.netty.Message;
 import org.onlab.netty.Message;

-package org.onlab.onos.store.common.impl;
-
-import java.util.Map;
-
-import org.onlab.onos.cluster.NodeId;
-import org.onlab.onos.store.Timestamp;
-
-import com.google.common.collect.ImmutableMap;
-
-/**
- * Anti-Entropy advertisement message.
- * <p>
- * Message to advertise the information this node holds.
- *
- * @param <ID> ID type
- */
-public class AntiEntropyAdvertisement<ID> {
-
-    private final NodeId sender;
-    private final ImmutableMap<ID, Timestamp> advertisement;
-
-    /**
-     * Creates anti-entropy advertisement message.
-     *
-     * @param sender sender of this message
-     * @param advertisement timestamp information of the data sender holds
-     */
-    public AntiEntropyAdvertisement(NodeId sender, Map<ID, Timestamp> advertisement) {
-        this.sender = sender;
-        this.advertisement = ImmutableMap.copyOf(advertisement);
-    }
-
-    public NodeId sender() {
-        return sender;
-    }
-
-    public ImmutableMap<ID, Timestamp> advertisement() {
-        return advertisement;
-    }
-
-    // Default constructor for serializer
-    protected AntiEntropyAdvertisement() {
-        this.sender = null;
-        this.advertisement = null;
-    }
-}

-package org.onlab.onos.store.common.impl;
-
-import java.util.Map;
-import java.util.Set;
-
-import org.onlab.onos.cluster.NodeId;
-import org.onlab.onos.store.VersionedValue;
-
-import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
-
-/**
- * Anti-Entropy reply message.
- * <p>
- * Message to send in reply to advertisement or another reply.
- * Suggest to the sender about the more up-to-date data this node has,
- * and request for more recent data that the receiver has.
- */
-public class AntiEntropyReply<ID, V extends VersionedValue<?>> {
-
-    private final NodeId sender;
-    private final ImmutableMap<ID, V> suggestion;
-    private final ImmutableSet<ID> request;
-
-    /**
-     * Creates a reply to anti-entropy message.
-     *
-     * @param sender sender of this message
-     * @param suggestion collection of more recent values, sender had
-     * @param request Collection of identifiers
-     */
-    public AntiEntropyReply(NodeId sender,
-                            Map<ID, V> suggestion,
-                            Set<ID> request) {
-        this.sender = sender;
-        this.suggestion = ImmutableMap.copyOf(suggestion);
-        this.request = ImmutableSet.copyOf(request);
-    }
-
-    public NodeId sender() {
-        return sender;
-    }
-
-    /**
-     * Returns collection of values, which the recipient of this reply is likely
-     * to be missing or has outdated version.
-     *
-     * @return
-     */
-    public ImmutableMap<ID, V> suggestion() {
-        return suggestion;
-    }
-
-    /**
-     * Returns collection of identifier to request.
-     *
-     * @return collection of identifier to request
-     */
-    public ImmutableSet<ID> request() {
-        return request;
-    }
-
-    /**
-     * Checks if reply contains any suggestion or request.
-     *
-     * @return true if nothing is suggested and requested
-     */
-    public boolean isEmpty() {
-        return suggestion.isEmpty() && request.isEmpty();
-    }
-
-    // Default constructor for serializer
-    protected AntiEntropyReply() {
-        this.sender = null;
-        this.suggestion = null;
-        this.request = null;
-    }
-}

+package org.onlab.onos.store.common.impl;
+
+import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.cluster.NodeId;
+
+import com.google.common.base.Function;
+
+/**
+ * Function to convert ControllerNode to NodeId.
+ */
+public final class ControllerNodeToNodeId
+    implements Function<ControllerNode, NodeId> {
+
+    private static final ControllerNodeToNodeId INSTANCE = new ControllerNodeToNodeId();
+
+    @Override
+    public NodeId apply(ControllerNode input) {
+        return input.id();
+    }
+
+    public static ControllerNodeToNodeId toNodeId() {
+        return INSTANCE;
+    }
+}

@@ -13,7 +13,7 @@ import com.google.common.collect.ComparisonChain;
  * Default implementation of Timestamp.
  * Default implementation of Timestamp.
  * TODO: Better documentation.
  * TODO: Better documentation.
  */
  */
-public final class DeviceMastershipBasedTimestamp implements Timestamp {
+public final class MastershipBasedTimestamp implements Timestamp {
 
 
     private final int termNumber;
     private final int termNumber;
     private final int sequenceNumber;
     private final int sequenceNumber;
@@ -24,16 +24,16 @@ public final class DeviceMastershipBasedTimestamp implements Timestamp {
      * @param termNumber the mastership termNumber
      * @param termNumber the mastership termNumber
      * @param sequenceNumber  the sequenceNumber number within the termNumber
      * @param sequenceNumber  the sequenceNumber number within the termNumber
      */
      */
-    public DeviceMastershipBasedTimestamp(int termNumber, int sequenceNumber) {
+    public MastershipBasedTimestamp(int termNumber, int sequenceNumber) {
         this.termNumber = termNumber;
         this.termNumber = termNumber;
         this.sequenceNumber = sequenceNumber;
         this.sequenceNumber = sequenceNumber;
     }
     }
 
 
     @Override
     @Override
     public int compareTo(Timestamp o) {
     public int compareTo(Timestamp o) {
-        checkArgument(o instanceof DeviceMastershipBasedTimestamp,
+        checkArgument(o instanceof MastershipBasedTimestamp,
                 "Must be MastershipBasedTimestamp", o);
                 "Must be MastershipBasedTimestamp", o);
-        DeviceMastershipBasedTimestamp that = (DeviceMastershipBasedTimestamp) o;
+        MastershipBasedTimestamp that = (MastershipBasedTimestamp) o;
 
 
         return ComparisonChain.start()
         return ComparisonChain.start()
                 .compare(this.termNumber, that.termNumber)
                 .compare(this.termNumber, that.termNumber)
@@ -51,10 +51,10 @@ public final class DeviceMastershipBasedTimestamp implements Timestamp {
         if (this == obj) {
         if (this == obj) {
             return true;
             return true;
         }
         }
-        if (!(obj instanceof DeviceMastershipBasedTimestamp)) {
+        if (!(obj instanceof MastershipBasedTimestamp)) {
             return false;
             return false;
         }
         }
-        DeviceMastershipBasedTimestamp that = (DeviceMastershipBasedTimestamp) obj;
+        MastershipBasedTimestamp that = (MastershipBasedTimestamp) obj;
         return Objects.equals(this.termNumber, that.termNumber) &&
         return Objects.equals(this.termNumber, that.termNumber) &&
                 Objects.equals(this.sequenceNumber, that.sequenceNumber);
                 Objects.equals(this.sequenceNumber, that.sequenceNumber);
     }
     }
@@ -87,7 +87,7 @@ public final class DeviceMastershipBasedTimestamp implements Timestamp {
 
 
     // Default constructor for serialization
     // Default constructor for serialization
     @Deprecated
     @Deprecated
-    protected DeviceMastershipBasedTimestamp() {
+    protected MastershipBasedTimestamp() {
         this.termNumber = -1;
         this.termNumber = -1;
         this.sequenceNumber = -1;
         this.sequenceNumber = -1;
     }
     }

-package org.onlab.onos.store;
+package org.onlab.onos.store.common.impl;
 
 
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Preconditions.checkNotNull;
 
 
 import java.util.Objects;
 import java.util.Objects;
 
 
+import org.onlab.onos.store.Timestamp;
+
 import com.google.common.base.MoreObjects;
 import com.google.common.base.MoreObjects;
 
 
 /**
 /**
@@ -28,6 +30,7 @@ public final class Timestamped<T> {
 
 
     /**
     /**
      * Returns the value.
      * Returns the value.
+     *
      * @return value
      * @return value
      */
      */
     public T value() {
     public T value() {
@@ -36,6 +39,7 @@ public final class Timestamped<T> {
 
 
     /**
     /**
      * Returns the time stamp.
      * Returns the time stamp.
+     *
      * @return time stamp
      * @return time stamp
      */
      */
     public Timestamp timestamp() {
     public Timestamp timestamp() {
@@ -49,7 +53,16 @@ public final class Timestamped<T> {
      * @return true if this instance is newer.
      * @return true if this instance is newer.
      */
      */
     public boolean isNewer(Timestamped<T> other) {
     public boolean isNewer(Timestamped<T> other) {
-        return this.timestamp.compareTo(checkNotNull(other).timestamp()) > 0;
+        return isNewer(checkNotNull(other).timestamp());
+    }
+
+    /**
+     * Tests if this timestamp is newer thatn the specified timestamp.
+     * @param timestamp to compare agains
+     * @return true if this instance is newer
+     */
+    public boolean isNewer(Timestamp timestamp) {
+        return this.timestamp.compareTo(checkNotNull(timestamp)) > 0;
     }
     }
 
 
     @Override
     @Override

-package org.onlab.onos.store.device.impl;
-
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
-
-import org.onlab.onos.cluster.NodeId;
-import org.onlab.onos.net.Device;
-import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.VersionedValue;
-import org.onlab.onos.store.common.impl.AntiEntropyAdvertisement;
-
-// TODO DeviceID needs to be changed to something like (ProviderID, DeviceID)
-// TODO: Handle Port as part of these messages, or separate messages for Ports?
-
-public class DeviceAntiEntropyAdvertisement
-    extends AntiEntropyAdvertisement<DeviceId> {
-
-
-    public DeviceAntiEntropyAdvertisement(NodeId sender,
-            Map<DeviceId, Timestamp> advertisement) {
-        super(sender, advertisement);
-    }
-
-    // May need to add ProviderID, etc.
-    public static DeviceAntiEntropyAdvertisement create(
-            NodeId self,
-            Collection<VersionedValue<Device>> localValues) {
-
-        Map<DeviceId, Timestamp> ads = new HashMap<>(localValues.size());
-        for (VersionedValue<Device> e : localValues) {
-            ads.put(e.entity().id(), e.timestamp());
-        }
-        return new DeviceAntiEntropyAdvertisement(self, ads);
-    }
-
-    // For serializer
-    protected DeviceAntiEntropyAdvertisement() {}
-}

-package org.onlab.onos.store.device.impl;
-
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
-import org.onlab.onos.cluster.NodeId;
-import org.onlab.onos.net.Device;
-import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.VersionedValue;
-import org.onlab.onos.store.common.impl.AntiEntropyReply;
-
-import com.google.common.collect.ImmutableMap;
-import com.google.common.collect.ImmutableSet;
-
-public class DeviceAntiEntropyReply
-    extends AntiEntropyReply<DeviceId, VersionedValue<Device>> {
-
-
-    public DeviceAntiEntropyReply(NodeId sender,
-            Map<DeviceId, VersionedValue<Device>> suggestion,
-            Set<DeviceId> request) {
-        super(sender, suggestion, request);
-    }
-
-    /**
-     * Creates a reply to Anti-Entropy advertisement.
-     *
-     * @param advertisement to respond to
-     * @param self node identifier representing local node
-     * @param localValues local values held on this node
-     * @return reply message
-     */
-    public static DeviceAntiEntropyReply reply(
-            DeviceAntiEntropyAdvertisement advertisement,
-            NodeId self,
-            Collection<VersionedValue<Device>> localValues
-            ) {
-
-        ImmutableMap<DeviceId, Timestamp> ads = advertisement.advertisement();
-
-        ImmutableMap.Builder<DeviceId, VersionedValue<Device>>
-            sug = ImmutableMap.builder();
-
-        Set<DeviceId> req = new HashSet<>(ads.keySet());
-
-        for (VersionedValue<Device> e : localValues) {
-            final DeviceId id = e.entity().id();
-            final Timestamp local = e.timestamp();
-            final Timestamp theirs = ads.get(id);
-            if (theirs == null) {
-                // they don't have it, suggest
-                sug.put(id, e);
-                // don't need theirs
-                req.remove(id);
-            } else if (local.compareTo(theirs) < 0) {
-                // they got older one, suggest
-                sug.put(id, e);
-                // don't need theirs
-                req.remove(id);
-            } else if (local.equals(theirs)) {
-                // same, don't need theirs
-                req.remove(id);
-            }
-        }
-
-        return new DeviceAntiEntropyReply(self, sug.build(), req);
-    }
-
-    /**
-     * Creates a reply to request for values held locally.
-     *
-     * @param requests message containing the request
-     * @param self node identifier representing local node
-     * @param localValues local valeds held on this node
-     * @return reply message
-     */
-    public static DeviceAntiEntropyReply reply(
-            DeviceAntiEntropyReply requests,
-            NodeId self,
-            Map<DeviceId, VersionedValue<Device>> localValues
-            ) {
-
-        Set<DeviceId> reqs = requests.request();
-
-        Map<DeviceId, VersionedValue<Device>> requested = new HashMap<>(reqs.size());
-        for (DeviceId id : reqs) {
-            final VersionedValue<Device> value = localValues.get(id);
-            if (value != null) {
-                requested.put(id, value);
-            }
-        }
-
-        Set<DeviceId> empty = ImmutableSet.of();
-        return new DeviceAntiEntropyReply(self, requested, empty);
-    }
-
-    // For serializer
-    protected DeviceAntiEntropyReply() {}
-}

@@ -10,12 +10,12 @@ import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 import org.onlab.onos.store.ClockProviderService;
 import org.onlab.onos.store.ClockProviderService;
 import org.onlab.onos.store.ClockService;
 import org.onlab.onos.store.ClockService;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.common.impl.DeviceMastershipBasedTimestamp;
+import org.onlab.onos.store.common.impl.MastershipBasedTimestamp;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 
 
 /**
 /**
@@ -29,7 +29,7 @@ public class DeviceClockManager implements ClockService, ClockProviderService {
 
 
     // TODO: Implement per device ticker that is reset to 0 at the beginning of a new term.
     // TODO: Implement per device ticker that is reset to 0 at the beginning of a new term.
     private final AtomicInteger ticker = new AtomicInteger(0);
     private final AtomicInteger ticker = new AtomicInteger(0);
-    private ConcurrentMap<DeviceId, DeviceMastershipTerm> deviceMastershipTerms = new ConcurrentHashMap<>();
+    private ConcurrentMap<DeviceId, MastershipTerm> deviceMastershipTerms = new ConcurrentHashMap<>();
 
 
     @Activate
     @Activate
     public void activate() {
     public void activate() {
@@ -43,15 +43,15 @@ public class DeviceClockManager implements ClockService, ClockProviderService {
 
 
     @Override
     @Override
     public Timestamp getTimestamp(DeviceId deviceId) {
     public Timestamp getTimestamp(DeviceId deviceId) {
-        DeviceMastershipTerm term = deviceMastershipTerms.get(deviceId);
+        MastershipTerm term = deviceMastershipTerms.get(deviceId);
         if (term == null) {
         if (term == null) {
             throw new IllegalStateException("Requesting timestamp for a deviceId without mastership");
             throw new IllegalStateException("Requesting timestamp for a deviceId without mastership");
         }
         }
-        return new DeviceMastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet());
+        return new MastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet());
     }
     }
 
 
     @Override
     @Override
-    public void setMastershipTerm(DeviceId deviceId, DeviceMastershipTerm term) {
+    public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) {
         deviceMastershipTerms.put(deviceId, term);
         deviceMastershipTerms.put(deviceId, term);
     }
     }
 }
 }

+package org.onlab.onos.store.device.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.onos.net.DefaultAnnotations.union;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.SparseAnnotations;
+import org.onlab.onos.net.device.DefaultDeviceDescription;
+import org.onlab.onos.net.device.DefaultPortDescription;
+import org.onlab.onos.net.device.DeviceDescription;
+import org.onlab.onos.net.device.PortDescription;
+import org.onlab.onos.store.Timestamp;
+import org.onlab.onos.store.common.impl.Timestamped;
+
+/*
+ * Collection of Description of a Device and Ports, given from a Provider.
+ */
+class DeviceDescriptions {
+
+    private volatile Timestamped<DeviceDescription> deviceDesc;
+
+    private final ConcurrentMap<PortNumber, Timestamped<PortDescription>> portDescs;
+
+    public DeviceDescriptions(Timestamped<DeviceDescription> desc) {
+        this.deviceDesc = checkNotNull(desc);
+        this.portDescs = new ConcurrentHashMap<>();
+    }
+
+    public Timestamp getLatestTimestamp() {
+        Timestamp latest = deviceDesc.timestamp();
+        for (Timestamped<PortDescription> desc : portDescs.values()) {
+            if (desc.timestamp().compareTo(latest) > 0) {
+                latest = desc.timestamp();
+            }
+        }
+        return latest;
+    }
+
+    public Timestamped<DeviceDescription> getDeviceDesc() {
+        return deviceDesc;
+    }
+
+    public Timestamped<PortDescription> getPortDesc(PortNumber number) {
+        return portDescs.get(number);
+    }
+
+    public Map<PortNumber, Timestamped<PortDescription>> getPortDescs() {
+        return Collections.unmodifiableMap(portDescs);
+    }
+
+    /**
+     * Puts DeviceDescription, merging annotations as necessary.
+     *
+     * @param newDesc new DeviceDescription
+     */
+    public synchronized void putDeviceDesc(Timestamped<DeviceDescription> newDesc) {
+        Timestamped<DeviceDescription> oldOne = deviceDesc;
+        Timestamped<DeviceDescription> newOne = newDesc;
+        if (oldOne != null) {
+            SparseAnnotations merged = union(oldOne.value().annotations(),
+                                             newDesc.value().annotations());
+            newOne = new Timestamped<DeviceDescription>(
+                    new DefaultDeviceDescription(newDesc.value(), merged),
+                    newDesc.timestamp());
+        }
+        deviceDesc = newOne;
+    }
+
+    /**
+     * Puts PortDescription, merging annotations as necessary.
+     *
+     * @param newDesc new PortDescription
+     */
+    public synchronized void putPortDesc(Timestamped<PortDescription> newDesc) {
+        Timestamped<PortDescription> oldOne = portDescs.get(newDesc.value().portNumber());
+        Timestamped<PortDescription> newOne = newDesc;
+        if (oldOne != null) {
+            SparseAnnotations merged = union(oldOne.value().annotations(),
+                                             newDesc.value().annotations());
+            newOne = new Timestamped<PortDescription>(
+                    new DefaultPortDescription(newDesc.value(), merged),
+                    newDesc.timestamp());
+        }
+        portDescs.put(newOne.value().portNumber(), newOne);
+    }
+}

@@ -2,6 +2,7 @@ package org.onlab.onos.store.device.impl;
 
 
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 
 
+// TODO: add prefix to assure uniqueness.
 /**
 /**
  * MessageSubjects used by GossipDeviceStore peer-peer communication.
  * MessageSubjects used by GossipDeviceStore peer-peer communication.
  */
  */
@@ -14,4 +15,8 @@ public final class GossipDeviceStoreMessageSubjects {
     public static final MessageSubject DEVICE_REMOVED = new MessageSubject("peer-device-removed");
     public static final MessageSubject DEVICE_REMOVED = new MessageSubject("peer-device-removed");
     public static final MessageSubject PORT_UPDATE = new MessageSubject("peer-port-update");
     public static final MessageSubject PORT_UPDATE = new MessageSubject("peer-port-update");
     public static final MessageSubject PORT_STATUS_UPDATE = new MessageSubject("peer-port-status-update");
     public static final MessageSubject PORT_STATUS_UPDATE = new MessageSubject("peer-port-status-update");
+
+    public static final MessageSubject DEVICE_ADVERTISE = new MessageSubject("peer-device-advertisements");
+    // to be used with 3-way anti-entropy process
+    public static final MessageSubject DEVICE_REQUEST = new MessageSubject("peer-device-request");
 }
 }

+package org.onlab.onos.store.device.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.apache.commons.lang3.concurrent.ConcurrentException;
+import org.apache.commons.lang3.concurrent.ConcurrentInitializer;
+import org.onlab.onos.net.device.DeviceDescription;
+import org.onlab.onos.store.common.impl.Timestamped;
+
+// FIXME: consider removing this class
+public final class InitDeviceDescs
+    implements ConcurrentInitializer<DeviceDescriptions> {
+
+    private final Timestamped<DeviceDescription> deviceDesc;
+
+    public InitDeviceDescs(Timestamped<DeviceDescription> deviceDesc) {
+        this.deviceDesc = checkNotNull(deviceDesc);
+    }
+    @Override
+    public DeviceDescriptions get() throws ConcurrentException {
+        return new DeviceDescriptions(deviceDesc);
+    }
+}
\ No newline at end of file

@@ -3,7 +3,9 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.DeviceDescription;
 import org.onlab.onos.net.device.DeviceDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
+
+import com.google.common.base.MoreObjects;
 
 
 /**
 /**
  * Information published by GossipDeviceStore to notify peers of a device
  * Information published by GossipDeviceStore to notify peers of a device
@@ -36,6 +38,15 @@ public class InternalDeviceEvent {
         return deviceDescription;
         return deviceDescription;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .add("deviceDescription", deviceDescription)
+                .toString();
+    }
+
     // for serializer
     // for serializer
     protected InternalDeviceEvent() {
     protected InternalDeviceEvent() {
         this.providerId = null;
         this.providerId = null;

@@ -3,7 +3,7 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.DeviceDescription;
 import org.onlab.onos.net.device.DeviceDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
 
 
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.Serializer;

@@ -3,6 +3,8 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
 
 
+import com.google.common.base.MoreObjects;
+
 /**
 /**
  * Information published by GossipDeviceStore to notify peers of a device
  * Information published by GossipDeviceStore to notify peers of a device
  * going offline.
  * going offline.
@@ -30,6 +32,14 @@ public class InternalDeviceOfflineEvent {
         return timestamp;
         return timestamp;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("deviceId", deviceId)
+                .add("timestamp", timestamp)
+                .toString();
+    }
+
     // for serializer
     // for serializer
     @SuppressWarnings("unused")
     @SuppressWarnings("unused")
     private InternalDeviceOfflineEvent() {
     private InternalDeviceOfflineEvent() {

@@ -3,6 +3,8 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
 
 
+import com.google.common.base.MoreObjects;
+
 /**
 /**
  * Information published by GossipDeviceStore to notify peers of a device
  * Information published by GossipDeviceStore to notify peers of a device
  * being administratively removed.
  * being administratively removed.
@@ -30,6 +32,14 @@ public class InternalDeviceRemovedEvent {
         return timestamp;
         return timestamp;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("deviceId", deviceId)
+                .add("timestamp", timestamp)
+                .toString();
+    }
+
     // for serializer
     // for serializer
     @SuppressWarnings("unused")
     @SuppressWarnings("unused")
     private InternalDeviceRemovedEvent() {
     private InternalDeviceRemovedEvent() {

@@ -5,7 +5,9 @@ import java.util.List;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
+
+import com.google.common.base.MoreObjects;
 
 
 /**
 /**
  * Information published by GossipDeviceStore to notify peers of a port
  * Information published by GossipDeviceStore to notify peers of a port
@@ -38,6 +40,15 @@ public class InternalPortEvent {
         return portDescriptions;
         return portDescriptions;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .add("portDescriptions", portDescriptions)
+                .toString();
+    }
+
     // for serializer
     // for serializer
     protected InternalPortEvent() {
     protected InternalPortEvent() {
         this.providerId = null;
         this.providerId = null;

@@ -5,7 +5,7 @@ import java.util.List;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
 
 
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.Serializer;

@@ -3,7 +3,9 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
+
+import com.google.common.base.MoreObjects;
 
 
 /**
 /**
  * Information published by GossipDeviceStore to notify peers of a port
  * Information published by GossipDeviceStore to notify peers of a port
@@ -36,6 +38,15 @@ public class InternalPortStatusEvent {
         return portDescription;
         return portDescription;
     }
     }
 
 
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .add("portDescription", portDescription)
+                .toString();
+    }
+
     // for serializer
     // for serializer
     protected InternalPortStatusEvent() {
     protected InternalPortStatusEvent() {
         this.providerId = null;
         this.providerId = null;

@@ -3,7 +3,7 @@ package org.onlab.onos.store.device.impl;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
-import org.onlab.onos.store.Timestamped;
+import org.onlab.onos.store.common.impl.Timestamped;
 
 
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.Serializer;
@@ -35,6 +35,7 @@ public class InternalPortStatusEventSerializer extends Serializer<InternalPortSt
                                Class<InternalPortStatusEvent> type) {
                                Class<InternalPortStatusEvent> type) {
         ProviderId providerId = (ProviderId) kryo.readClassAndObject(input);
         ProviderId providerId = (ProviderId) kryo.readClassAndObject(input);
         DeviceId deviceId = (DeviceId) kryo.readClassAndObject(input);
         DeviceId deviceId = (DeviceId) kryo.readClassAndObject(input);
+        @SuppressWarnings("unchecked")
         Timestamped<PortDescription> portDescription = (Timestamped<PortDescription>) kryo.readClassAndObject(input);
         Timestamped<PortDescription> portDescription = (Timestamped<PortDescription>) kryo.readClassAndObject(input);
 
 
         return new InternalPortStatusEvent(providerId, deviceId, portDescription);
         return new InternalPortStatusEvent(providerId, deviceId, portDescription);

+package org.onlab.onos.store.device.impl.peermsg;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Map;
+
+import org.onlab.onos.cluster.NodeId;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.store.Timestamp;
+
+
+/**
+ * Device Advertisement message.
+ */
+public class DeviceAntiEntropyAdvertisement {
+
+    private final NodeId sender;
+    private final Map<DeviceFragmentId, Timestamp> deviceFingerPrints;
+    private final Map<PortFragmentId, Timestamp> portFingerPrints;
+    private final Map<DeviceId, Timestamp> offline;
+
+
+    public DeviceAntiEntropyAdvertisement(NodeId sender,
+                Map<DeviceFragmentId, Timestamp> devices,
+                Map<PortFragmentId, Timestamp> ports,
+                Map<DeviceId, Timestamp> offline) {
+        this.sender = checkNotNull(sender);
+        this.deviceFingerPrints = checkNotNull(devices);
+        this.portFingerPrints = checkNotNull(ports);
+        this.offline = checkNotNull(offline);
+    }
+
+    public NodeId sender() {
+        return sender;
+    }
+
+    public Map<DeviceFragmentId, Timestamp> deviceFingerPrints() {
+        return deviceFingerPrints;
+    }
+
+    public Map<PortFragmentId, Timestamp> ports() {
+        return portFingerPrints;
+    }
+
+    public Map<DeviceId, Timestamp> offline() {
+        return offline;
+    }
+
+    // For serializer
+    @SuppressWarnings("unused")
+    private DeviceAntiEntropyAdvertisement() {
+        this.sender = null;
+        this.deviceFingerPrints = null;
+        this.portFingerPrints = null;
+        this.offline = null;
+    }
+}

+package org.onlab.onos.store.device.impl.peermsg;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Collection;
+
+import org.onlab.onos.cluster.NodeId;
+
+/**
+ * Message to request for other peers information.
+ */
+public class DeviceAntiEntropyRequest {
+
+    private final NodeId sender;
+    private final Collection<DeviceFragmentId> devices;
+    private final Collection<PortFragmentId> ports;
+
+    public DeviceAntiEntropyRequest(NodeId sender,
+                                   Collection<DeviceFragmentId> devices,
+                                   Collection<PortFragmentId> ports) {
+
+        this.sender = checkNotNull(sender);
+        this.devices = checkNotNull(devices);
+        this.ports = checkNotNull(ports);
+    }
+
+    public NodeId sender() {
+        return sender;
+    }
+
+    public Collection<DeviceFragmentId> devices() {
+        return devices;
+    }
+
+    public Collection<PortFragmentId> ports() {
+        return ports;
+    }
+
+    // For serializer
+    @SuppressWarnings("unused")
+    private DeviceAntiEntropyRequest() {
+        this.sender = null;
+        this.devices = null;
+        this.ports = null;
+    }
+}

+package org.onlab.onos.store.device.impl.peermsg;
+
+import java.util.Objects;
+
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.provider.ProviderId;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Identifier for DeviceDesctiption from a Provider.
+ */
+public final class DeviceFragmentId {
+    public final ProviderId providerId;
+    public final DeviceId deviceId;
+
+    public DeviceFragmentId(DeviceId deviceId, ProviderId providerId) {
+        this.providerId = providerId;
+        this.deviceId = deviceId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(providerId, deviceId);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof DeviceFragmentId)) {
+            return false;
+        }
+        DeviceFragmentId that = (DeviceFragmentId) obj;
+        return Objects.equals(this.deviceId, that.deviceId) &&
+               Objects.equals(this.providerId, that.providerId);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .toString();
+    }
+
+    // for serializer
+    @SuppressWarnings("unused")
+    private DeviceFragmentId() {
+        this.providerId = null;
+        this.deviceId = null;
+    }
+}
\ No newline at end of file

+package org.onlab.onos.store.device.impl.peermsg;
+
+import java.util.Objects;
+
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.provider.ProviderId;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Identifier for PortDescription from a Provider.
+ */
+public final class PortFragmentId {
+    public final ProviderId providerId;
+    public final DeviceId deviceId;
+    public final PortNumber portNumber;
+
+    public PortFragmentId(DeviceId deviceId, ProviderId providerId,
+                          PortNumber portNumber) {
+        this.providerId = providerId;
+        this.deviceId = deviceId;
+        this.portNumber = portNumber;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(providerId, deviceId, portNumber);
+    };
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof PortFragmentId)) {
+            return false;
+        }
+        PortFragmentId that = (PortFragmentId) obj;
+        return Objects.equals(this.deviceId, that.deviceId) &&
+               Objects.equals(this.portNumber, that.portNumber) &&
+               Objects.equals(this.providerId, that.providerId);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("providerId", providerId)
+                .add("deviceId", deviceId)
+                .add("portNumber", portNumber)
+                .toString();
+    }
+
+    // for serializer
+    @SuppressWarnings("unused")
+    private PortFragmentId() {
+        this.providerId = null;
+        this.deviceId = null;
+        this.portNumber = null;
+    }
+}
\ No newline at end of file

+/**
+ * Structure and utilities used for inter-Node messaging.
+ */
+package org.onlab.onos.store.device.impl.peermsg;

 package org.onlab.onos.store.host.impl;
 package org.onlab.onos.store.host.impl;
 
 
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_ADDED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_MOVED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_REMOVED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_UPDATED;
-import static org.slf4j.LoggerFactory.getLogger;
-
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Sets;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.net.Annotations;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.DefaultHost;
 import org.onlab.onos.net.DefaultHost;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.Host;
 import org.onlab.onos.net.Host;
 import org.onlab.onos.net.HostId;
 import org.onlab.onos.net.HostId;
+import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostEvent;
 import org.onlab.onos.net.host.HostEvent;
 import org.onlab.onos.net.host.HostStore;
 import org.onlab.onos.net.host.HostStore;
@@ -33,10 +27,13 @@ import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.packet.VlanId;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 
 
-import com.google.common.collect.HashMultimap;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Multimap;
-import com.google.common.collect.Sets;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static org.onlab.onos.net.host.HostEvent.Type.*;
+import static org.slf4j.LoggerFactory.getLogger;
 
 
 /**
 /**
  * Manages inventory of end-station hosts using trivial in-memory
  * Manages inventory of end-station hosts using trivial in-memory
@@ -46,13 +43,13 @@ import com.google.common.collect.Sets;
 @Component(immediate = true)
 @Component(immediate = true)
 @Service
 @Service
 public class DistributedHostStore
 public class DistributedHostStore
-extends AbstractStore<HostEvent, HostStoreDelegate>
-implements HostStore {
+        extends AbstractStore<HostEvent, HostStoreDelegate>
+        implements HostStore {
 
 
     private final Logger log = getLogger(getClass());
     private final Logger log = getLogger(getClass());
 
 
     // Host inventory
     // Host inventory
-    private final Map<HostId, Host> hosts = new ConcurrentHashMap<>();
+    private final Map<HostId, StoredHost> hosts = new ConcurrentHashMap<>(2000000, 0.75f, 16);
 
 
     // Hosts tracked by their location
     // Hosts tracked by their location
     private final Multimap<ConnectPoint, Host> locations = HashMultimap.create();
     private final Multimap<ConnectPoint, Host> locations = HashMultimap.create();
@@ -73,7 +70,7 @@ implements HostStore {
     @Override
     @Override
     public HostEvent createOrUpdateHost(ProviderId providerId, HostId hostId,
     public HostEvent createOrUpdateHost(ProviderId providerId, HostId hostId,
                                         HostDescription hostDescription) {
                                         HostDescription hostDescription) {
-        Host host = hosts.get(hostId);
+        StoredHost host = hosts.get(hostId);
         if (host == null) {
         if (host == null) {
             return createHost(providerId, hostId, hostDescription);
             return createHost(providerId, hostId, hostDescription);
         }
         }
@@ -83,11 +80,11 @@ implements HostStore {
     // creates a new host and sends HOST_ADDED
     // creates a new host and sends HOST_ADDED
     private HostEvent createHost(ProviderId providerId, HostId hostId,
     private HostEvent createHost(ProviderId providerId, HostId hostId,
                                  HostDescription descr) {
                                  HostDescription descr) {
-        DefaultHost newhost = new DefaultHost(providerId, hostId,
+        StoredHost newhost = new StoredHost(providerId, hostId,
                                             descr.hwAddress(),
                                             descr.hwAddress(),
                                             descr.vlan(),
                                             descr.vlan(),
                                             descr.location(),
                                             descr.location(),
-                descr.ipAddresses());
+                                            ImmutableSet.of(descr.ipAddress()));
         synchronized (this) {
         synchronized (this) {
             hosts.put(hostId, newhost);
             hosts.put(hostId, newhost);
             locations.put(descr.location(), newhost);
             locations.put(descr.location(), newhost);
@@ -96,28 +93,24 @@ implements HostStore {
     }
     }
 
 
     // checks for type of update to host, sends appropriate event
     // checks for type of update to host, sends appropriate event
-    private HostEvent updateHost(ProviderId providerId, Host host,
+    private HostEvent updateHost(ProviderId providerId, StoredHost host,
                                  HostDescription descr) {
                                  HostDescription descr) {
-        DefaultHost updated;
         HostEvent event;
         HostEvent event;
         if (!host.location().equals(descr.location())) {
         if (!host.location().equals(descr.location())) {
-            updated = new DefaultHost(providerId, host.id(),
-                    host.mac(),
-                    host.vlan(),
-                    descr.location(),
-                    host.ipAddresses());
-            event = new HostEvent(HOST_MOVED, updated);
+            host.setLocation(descr.location());
+            return new HostEvent(HOST_MOVED, host);
+        }
 
 
-        } else if (!(host.ipAddresses().equals(descr.ipAddresses()))) {
-            updated = new DefaultHost(providerId, host.id(),
-                    host.mac(),
-                    host.vlan(),
-                    descr.location(),
-                    descr.ipAddresses());
-            event = new HostEvent(HOST_UPDATED, updated);
-        } else {
+        if (host.ipAddresses().contains(descr.ipAddress())) {
             return null;
             return null;
         }
         }
+
+        Set<IpPrefix> addresses = new HashSet<>(host.ipAddresses());
+        addresses.add(descr.ipAddress());
+        StoredHost updated = new StoredHost(providerId, host.id(),
+                                            host.mac(), host.vlan(),
+                                            descr.location(), addresses);
+        event = new HostEvent(HOST_UPDATED, updated);
         synchronized (this) {
         synchronized (this) {
             hosts.put(host.id(), updated);
             hosts.put(host.id(), updated);
             locations.remove(host.location(), host);
             locations.remove(host.location(), host);
@@ -145,7 +138,7 @@ implements HostStore {
 
 
     @Override
     @Override
     public Iterable<Host> getHosts() {
     public Iterable<Host> getHosts() {
-        return Collections.unmodifiableSet(new HashSet<>(hosts.values()));
+        return ImmutableSet.<Host>copyOf(hosts.values());
     }
     }
 
 
     @Override
     @Override
@@ -275,4 +268,35 @@ implements HostStore {
         return addresses;
         return addresses;
     }
     }
 
 
+    // Auxiliary extension to allow location to mutate.
+    private class StoredHost extends DefaultHost {
+        private HostLocation location;
+
+        /**
+         * Creates an end-station host using the supplied information.
+         *
+         * @param providerId  provider identity
+         * @param id          host identifier
+         * @param mac         host MAC address
+         * @param vlan        host VLAN identifier
+         * @param location    host location
+         * @param ips         host IP addresses
+         * @param annotations optional key/value annotations
+         */
+        public StoredHost(ProviderId providerId, HostId id,
+                          MacAddress mac, VlanId vlan, HostLocation location,
+                          Set<IpPrefix> ips, Annotations... annotations) {
+            super(providerId, id, mac, vlan, location, ips, annotations);
+            this.location = location;
+        }
+
+        void setLocation(HostLocation location) {
+            this.location = location;
+        }
+
+        @Override
+        public HostLocation location() {
+            return location;
+        }
+    }
 }
 }

@@ -31,7 +31,6 @@ import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.store.AbstractStore;
 import org.onlab.onos.store.AbstractStore;
 import org.onlab.onos.store.ClockService;
 import org.onlab.onos.store.ClockService;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.VersionedValue;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 
 
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.HashMultimap;

-package org.onlab.onos.store;
+package org.onlab.onos.store.link.impl;
 
 
 import java.util.Objects;
 import java.util.Objects;
 
 
+import org.onlab.onos.store.Timestamp;
+
+// TODO: remove once we stop using this
 /**
 /**
  * Wrapper class for a entity that is versioned
  * Wrapper class for a entity that is versioned
  * and can either be up or down.
  * and can either be up or down.

-package org.onlab.onos.store.cluster.messaging.impl;
+package org.onlab.onos.store.serializers;
 
 
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.store.cluster.messaging.ClusterMessage;
 import org.onlab.onos.store.cluster.messaging.ClusterMessage;

+package org.onlab.onos.store.serializers;
+
+import org.onlab.onos.store.common.impl.MastershipBasedTimestamp;
+import org.onlab.onos.store.common.impl.Timestamped;
+import org.onlab.util.KryoPool;
+
+public final class DistributedStoreSerializers {
+
+    /**
+     * KryoPool which can serialize ON.lab misc classes.
+     */
+    public static final KryoPool COMMON = KryoPool.newBuilder()
+            .register(KryoPoolUtil.API)
+            .register(Timestamped.class)
+            .register(MastershipBasedTimestamp.class, new MastershipBasedTimestampSerializer())
+            .build();
+
+    // avoid instantiation
+    private DistributedStoreSerializers() {}
+}

-package org.onlab.onos.store.common.impl;
+package org.onlab.onos.store.serializers;
+
+import org.onlab.onos.store.common.impl.MastershipBasedTimestamp;
 
 
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.Serializer;
@@ -7,12 +9,12 @@ import com.esotericsoftware.kryo.io.Output;
 
 
 // To be used if Timestamp ever needs to cross bundle boundary.
 // To be used if Timestamp ever needs to cross bundle boundary.
 /**
 /**
- * Kryo Serializer for {@link DeviceMastershipBasedTimestamp}.
+ * Kryo Serializer for {@link MastershipBasedTimestamp}.
  */
  */
-public class MastershipBasedTimestampSerializer extends Serializer<DeviceMastershipBasedTimestamp> {
+public class MastershipBasedTimestampSerializer extends Serializer<MastershipBasedTimestamp> {
 
 
     /**
     /**
-     * Creates a serializer for {@link DeviceMastershipBasedTimestamp}.
+     * Creates a serializer for {@link MastershipBasedTimestamp}.
      */
      */
     public MastershipBasedTimestampSerializer() {
     public MastershipBasedTimestampSerializer() {
         // non-null, immutable
         // non-null, immutable
@@ -20,15 +22,15 @@ public class MastershipBasedTimestampSerializer extends Serializer<DeviceMasters
     }
     }
 
 
     @Override
     @Override
-    public void write(Kryo kryo, Output output, DeviceMastershipBasedTimestamp object) {
+    public void write(Kryo kryo, Output output, MastershipBasedTimestamp object) {
         output.writeInt(object.termNumber());
         output.writeInt(object.termNumber());
         output.writeInt(object.sequenceNumber());
         output.writeInt(object.sequenceNumber());
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipBasedTimestamp read(Kryo kryo, Input input, Class<DeviceMastershipBasedTimestamp> type) {
+    public MastershipBasedTimestamp read(Kryo kryo, Input input, Class<MastershipBasedTimestamp> type) {
         final int term = input.readInt();
         final int term = input.readInt();
         final int sequence = input.readInt();
         final int sequence = input.readInt();
-        return new DeviceMastershipBasedTimestamp(term, sequence);
+        return new MastershipBasedTimestamp(term, sequence);
     }
     }
 }
 }

-package org.onlab.onos.store.cluster.messaging.impl;
+package org.onlab.onos.store.serializers;
 
 
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 import org.onlab.onos.store.cluster.messaging.MessageSubject;
 
 

@@ -6,25 +6,26 @@ import java.nio.ByteBuffer;
 
 
 import org.junit.Test;
 import org.junit.Test;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
+import org.onlab.onos.store.serializers.MastershipBasedTimestampSerializer;
 import org.onlab.util.KryoPool;
 import org.onlab.util.KryoPool;
 
 
 import com.google.common.testing.EqualsTester;
 import com.google.common.testing.EqualsTester;
 
 
 /**
 /**
- * Test of {@link DeviceMastershipBasedTimestamp}.
+ * Test of {@link MastershipBasedTimestamp}.
  */
  */
 public class MastershipBasedTimestampTest {
 public class MastershipBasedTimestampTest {
 
 
-    private static final Timestamp TS_1_1 = new DeviceMastershipBasedTimestamp(1, 1);
-    private static final Timestamp TS_1_2 = new DeviceMastershipBasedTimestamp(1, 2);
-    private static final Timestamp TS_2_1 = new DeviceMastershipBasedTimestamp(2, 1);
-    private static final Timestamp TS_2_2 = new DeviceMastershipBasedTimestamp(2, 2);
+    private static final Timestamp TS_1_1 = new MastershipBasedTimestamp(1, 1);
+    private static final Timestamp TS_1_2 = new MastershipBasedTimestamp(1, 2);
+    private static final Timestamp TS_2_1 = new MastershipBasedTimestamp(2, 1);
+    private static final Timestamp TS_2_2 = new MastershipBasedTimestamp(2, 2);
 
 
     @Test
     @Test
     public final void testBasic() {
     public final void testBasic() {
         final int termNumber = 5;
         final int termNumber = 5;
         final int sequenceNumber = 6;
         final int sequenceNumber = 6;
-        DeviceMastershipBasedTimestamp ts = new DeviceMastershipBasedTimestamp(termNumber,
+        MastershipBasedTimestamp ts = new MastershipBasedTimestamp(termNumber,
                                                 sequenceNumber);
                                                 sequenceNumber);
 
 
         assertEquals(termNumber, ts.termNumber());
         assertEquals(termNumber, ts.termNumber());
@@ -34,7 +35,7 @@ public class MastershipBasedTimestampTest {
     @Test
     @Test
     public final void testCompareTo() {
     public final void testCompareTo() {
         assertTrue(TS_1_1.compareTo(TS_1_1) == 0);
         assertTrue(TS_1_1.compareTo(TS_1_1) == 0);
-        assertTrue(TS_1_1.compareTo(new DeviceMastershipBasedTimestamp(1, 1)) == 0);
+        assertTrue(TS_1_1.compareTo(new MastershipBasedTimestamp(1, 1)) == 0);
 
 
         assertTrue(TS_1_1.compareTo(TS_1_2) < 0);
         assertTrue(TS_1_1.compareTo(TS_1_2) < 0);
         assertTrue(TS_1_2.compareTo(TS_1_1) > 0);
         assertTrue(TS_1_2.compareTo(TS_1_1) > 0);
@@ -48,14 +49,14 @@ public class MastershipBasedTimestampTest {
     @Test
     @Test
     public final void testEqualsObject() {
     public final void testEqualsObject() {
         new EqualsTester()
         new EqualsTester()
-        .addEqualityGroup(new DeviceMastershipBasedTimestamp(1, 1),
-                          new DeviceMastershipBasedTimestamp(1, 1), TS_1_1)
-        .addEqualityGroup(new DeviceMastershipBasedTimestamp(1, 2),
-                          new DeviceMastershipBasedTimestamp(1, 2), TS_1_2)
-        .addEqualityGroup(new DeviceMastershipBasedTimestamp(2, 1),
-                          new DeviceMastershipBasedTimestamp(2, 1), TS_2_1)
-        .addEqualityGroup(new DeviceMastershipBasedTimestamp(2, 2),
-                          new DeviceMastershipBasedTimestamp(2, 2), TS_2_2)
+        .addEqualityGroup(new MastershipBasedTimestamp(1, 1),
+                          new MastershipBasedTimestamp(1, 1), TS_1_1)
+        .addEqualityGroup(new MastershipBasedTimestamp(1, 2),
+                          new MastershipBasedTimestamp(1, 2), TS_1_2)
+        .addEqualityGroup(new MastershipBasedTimestamp(2, 1),
+                          new MastershipBasedTimestamp(2, 1), TS_2_1)
+        .addEqualityGroup(new MastershipBasedTimestamp(2, 2),
+                          new MastershipBasedTimestamp(2, 2), TS_2_2)
         .testEquals();
         .testEquals();
     }
     }
 
 
@@ -63,7 +64,7 @@ public class MastershipBasedTimestampTest {
     public final void testKryoSerializable() {
     public final void testKryoSerializable() {
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final KryoPool kryos = KryoPool.newBuilder()
         final KryoPool kryos = KryoPool.newBuilder()
-                .register(DeviceMastershipBasedTimestamp.class)
+                .register(MastershipBasedTimestamp.class)
                 .build();
                 .build();
 
 
         kryos.serialize(TS_2_1, buffer);
         kryos.serialize(TS_2_1, buffer);
@@ -79,7 +80,7 @@ public class MastershipBasedTimestampTest {
     public final void testKryoSerializableWithHandcraftedSerializer() {
     public final void testKryoSerializableWithHandcraftedSerializer() {
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final KryoPool kryos = KryoPool.newBuilder()
         final KryoPool kryos = KryoPool.newBuilder()
-                .register(DeviceMastershipBasedTimestamp.class, new MastershipBasedTimestampSerializer())
+                .register(MastershipBasedTimestamp.class, new MastershipBasedTimestampSerializer())
                 .build();
                 .build();
 
 
         kryos.serialize(TS_1_2, buffer);
         kryos.serialize(TS_1_2, buffer);

@@ -6,7 +6,6 @@ import java.nio.ByteBuffer;
 
 
 import org.junit.Test;
 import org.junit.Test;
 import org.onlab.onos.store.Timestamp;
 import org.onlab.onos.store.Timestamp;
-import org.onlab.onos.store.Timestamped;
 import org.onlab.util.KryoPool;
 import org.onlab.util.KryoPool;
 
 
 import com.google.common.testing.EqualsTester;
 import com.google.common.testing.EqualsTester;
@@ -16,9 +15,9 @@ import com.google.common.testing.EqualsTester;
  */
  */
 public class TimestampedTest {
 public class TimestampedTest {
 
 
-    private static final Timestamp TS_1_1 = new DeviceMastershipBasedTimestamp(1, 1);
-    private static final Timestamp TS_1_2 = new DeviceMastershipBasedTimestamp(1, 2);
-    private static final Timestamp TS_2_1 = new DeviceMastershipBasedTimestamp(2, 1);
+    private static final Timestamp TS_1_1 = new MastershipBasedTimestamp(1, 1);
+    private static final Timestamp TS_1_2 = new MastershipBasedTimestamp(1, 2);
+    private static final Timestamp TS_2_1 = new MastershipBasedTimestamp(2, 1);
 
 
     @Test
     @Test
     public final void testHashCode() {
     public final void testHashCode() {
@@ -80,7 +79,7 @@ public class TimestampedTest {
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final ByteBuffer buffer = ByteBuffer.allocate(1 * 1024 * 1024);
         final KryoPool kryos = KryoPool.newBuilder()
         final KryoPool kryos = KryoPool.newBuilder()
                 .register(Timestamped.class,
                 .register(Timestamped.class,
-                        DeviceMastershipBasedTimestamp.class)
+                        MastershipBasedTimestamp.class)
                 .build();
                 .build();
 
 
         Timestamped<String> original = new Timestamped<>("foobar", TS_1_1);
         Timestamped<String> original = new Timestamped<>("foobar", TS_1_1);

@@ -25,6 +25,7 @@ import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.Annotations;
 import org.onlab.onos.net.Annotations;
 import org.onlab.onos.net.DefaultAnnotations;
 import org.onlab.onos.net.DefaultAnnotations;
@@ -39,7 +40,6 @@ import org.onlab.onos.net.device.DeviceDescription;
 import org.onlab.onos.net.device.DeviceEvent;
 import org.onlab.onos.net.device.DeviceEvent;
 import org.onlab.onos.net.device.DeviceStore;
 import org.onlab.onos.net.device.DeviceStore;
 import org.onlab.onos.net.device.DeviceStoreDelegate;
 import org.onlab.onos.net.device.DeviceStoreDelegate;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.store.ClockService;
 import org.onlab.onos.store.ClockService;
@@ -113,8 +113,8 @@ public class GossipDeviceStoreTest {
         deviceClockManager.activate();
         deviceClockManager.activate();
         clockService = deviceClockManager;
         clockService = deviceClockManager;
 
 
-        deviceClockManager.setMastershipTerm(DID1, DeviceMastershipTerm.of(MYSELF, 1));
-        deviceClockManager.setMastershipTerm(DID2, DeviceMastershipTerm.of(MYSELF, 2));
+        deviceClockManager.setMastershipTerm(DID1, MastershipTerm.of(MYSELF, 1));
+        deviceClockManager.setMastershipTerm(DID2, MastershipTerm.of(MYSELF, 2));
 
 
         ClusterCommunicationService clusterCommunicator = new TestClusterCommunicationService();
         ClusterCommunicationService clusterCommunicator = new TestClusterCommunicationService();
         ClusterService clusterService = new TestClusterService();
         ClusterService clusterService = new TestClusterService();

@@ -46,10 +46,6 @@
           <groupId>com.hazelcast</groupId>
           <groupId>com.hazelcast</groupId>
           <artifactId>hazelcast</artifactId>
           <artifactId>hazelcast</artifactId>
         </dependency>
         </dependency>
-        <dependency>
-          <groupId>de.javakaffee</groupId>
-          <artifactId>kryo-serializers</artifactId>
-        </dependency>
     </dependencies>
     </dependencies>
 
 
     <build>
     <build>

 package org.onlab.onos.store.cluster.impl;
 package org.onlab.onos.store.cluster.impl;
 
 
-import static org.onlab.onos.net.device.DeviceMastershipEvent.Type.MASTER_CHANGED;
+import static org.onlab.onos.cluster.MastershipEvent.Type.MASTER_CHANGED;
 
 
 import java.util.Map;
 import java.util.Map;
 import java.util.Set;
 import java.util.Set;
@@ -12,13 +12,13 @@ import org.apache.felix.scr.annotations.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
 import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ClusterService;
+import org.onlab.onos.cluster.MastershipEvent;
+import org.onlab.onos.cluster.MastershipStore;
+import org.onlab.onos.cluster.MastershipStoreDelegate;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.MastershipRole;
 import org.onlab.onos.net.MastershipRole;
-import org.onlab.onos.net.device.DeviceMastershipEvent;
-import org.onlab.onos.net.device.DeviceMastershipStore;
-import org.onlab.onos.net.device.DeviceMastershipStoreDelegate;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 import org.onlab.onos.store.common.AbstractHazelcastStore;
 import org.onlab.onos.store.common.AbstractHazelcastStore;
 
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSet;
@@ -32,9 +32,9 @@ import com.hazelcast.core.MultiMap;
  */
  */
 @Component(immediate = true)
 @Component(immediate = true)
 @Service
 @Service
-public class DistributedDeviceMastershipStore
-extends AbstractHazelcastStore<DeviceMastershipEvent, DeviceMastershipStoreDelegate>
-implements DeviceMastershipStore {
+public class DistributedMastershipStore
+extends AbstractHazelcastStore<MastershipEvent, MastershipStoreDelegate>
+implements MastershipStore {
 
 
     //arbitrary lock name
     //arbitrary lock name
     private static final String LOCK = "lock";
     private static final String LOCK = "lock";
@@ -100,7 +100,7 @@ implements DeviceMastershipStore {
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) {
+    public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) {
         byte [] did = serialize(deviceId);
         byte [] did = serialize(deviceId);
         byte [] nid = serialize(nodeId);
         byte [] nid = serialize(nodeId);
 
 
@@ -123,12 +123,12 @@ implements DeviceMastershipStore {
                     masters.put(did, nid);
                     masters.put(did, nid);
                     evict(nid, did);
                     evict(nid, did);
                     updateTerm(did);
                     updateTerm(did);
-                    return new DeviceMastershipEvent(MASTER_CHANGED, deviceId, nodeId);
+                    return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId);
                 case NONE:
                 case NONE:
                     masters.put(did, nid);
                     masters.put(did, nid);
                     evict(nid, did);
                     evict(nid, did);
                     updateTerm(did);
                     updateTerm(did);
-                    return new DeviceMastershipEvent(MASTER_CHANGED, deviceId, nodeId);
+                    return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId);
                 default:
                 default:
                     log.warn("unknown Mastership Role {}", role);
                     log.warn("unknown Mastership Role {}", role);
                     return null;
                     return null;
@@ -191,21 +191,21 @@ implements DeviceMastershipStore {
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipTerm getTermFor(DeviceId deviceId) {
+    public MastershipTerm getTermFor(DeviceId deviceId) {
         byte[] did = serialize(deviceId);
         byte[] did = serialize(deviceId);
         if ((masters.get(did) == null) ||
         if ((masters.get(did) == null) ||
                 (terms.get(did) == null)) {
                 (terms.get(did) == null)) {
             return null;
             return null;
         }
         }
-        return DeviceMastershipTerm.of(
+        return MastershipTerm.of(
                 (NodeId) deserialize(masters.get(did)), terms.get(did));
                 (NodeId) deserialize(masters.get(did)), terms.get(did));
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) {
+    public MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) {
         byte [] did = serialize(deviceId);
         byte [] did = serialize(deviceId);
         byte [] nid = serialize(nodeId);
         byte [] nid = serialize(nodeId);
-        DeviceMastershipEvent event = null;
+        MastershipEvent event = null;
 
 
         ILock lock = theInstance.getLock(LOCK);
         ILock lock = theInstance.getLock(LOCK);
         lock.lock();
         lock.lock();
@@ -231,10 +231,10 @@ implements DeviceMastershipStore {
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) {
+    public MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) {
         byte [] did = serialize(deviceId);
         byte [] did = serialize(deviceId);
         byte [] nid = serialize(nodeId);
         byte [] nid = serialize(nodeId);
-        DeviceMastershipEvent event = null;
+        MastershipEvent event = null;
 
 
         ILock lock = theInstance.getLock(LOCK);
         ILock lock = theInstance.getLock(LOCK);
         lock.lock();
         lock.lock();
@@ -260,7 +260,7 @@ implements DeviceMastershipStore {
     }
     }
 
 
     //helper to fetch a new master candidate for a given device.
     //helper to fetch a new master candidate for a given device.
-    private DeviceMastershipEvent reelect(NodeId current, DeviceId deviceId) {
+    private MastershipEvent reelect(NodeId current, DeviceId deviceId) {
         byte [] did = serialize(deviceId);
         byte [] did = serialize(deviceId);
         byte [] nid = serialize(current);
         byte [] nid = serialize(current);
 
 
@@ -281,7 +281,7 @@ implements DeviceMastershipStore {
             evict(backup, did);
             evict(backup, did);
             Integer term = terms.get(did);
             Integer term = terms.get(did);
             terms.put(did, ++term);
             terms.put(did, ++term);
-            return new DeviceMastershipEvent(
+            return new MastershipEvent(
                     MASTER_CHANGED, deviceId, (NodeId) deserialize(backup));
                     MASTER_CHANGED, deviceId, (NodeId) deserialize(backup));
         }
         }
     }
     }
@@ -320,7 +320,7 @@ implements DeviceMastershipStore {
 
 
         @Override
         @Override
         protected void onAdd(DeviceId deviceId, NodeId nodeId) {
         protected void onAdd(DeviceId deviceId, NodeId nodeId) {
-            notifyDelegate(new DeviceMastershipEvent(MASTER_CHANGED, deviceId, nodeId));
+            notifyDelegate(new MastershipEvent(MASTER_CHANGED, deviceId, nodeId));
         }
         }
 
 
         @Override
         @Override

@@ -21,12 +21,12 @@ import org.onlab.onos.cluster.ClusterService;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.ControllerNode.State;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
+import org.onlab.onos.cluster.MastershipEvent;
+import org.onlab.onos.cluster.MastershipEvent.Type;
+import org.onlab.onos.cluster.MastershipStoreDelegate;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipEvent;
-import org.onlab.onos.net.device.DeviceMastershipStoreDelegate;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
-import org.onlab.onos.net.device.DeviceMastershipEvent.Type;
 import org.onlab.onos.store.common.StoreManager;
 import org.onlab.onos.store.common.StoreManager;
 import org.onlab.onos.store.common.StoreService;
 import org.onlab.onos.store.common.StoreService;
 import org.onlab.onos.store.common.TestStoreManager;
 import org.onlab.onos.store.common.TestStoreManager;
@@ -40,7 +40,7 @@ import com.hazelcast.core.Hazelcast;
 /**
 /**
  * Test of the Hazelcast-based distributed MastershipStore implementation.
  * Test of the Hazelcast-based distributed MastershipStore implementation.
  */
  */
-public class DistributedDeviceMastershipStoreTest {
+public class DistributedMastershipStoreTest {
 
 
     private static final DeviceId DID1 = DeviceId.deviceId("of:01");
     private static final DeviceId DID1 = DeviceId.deviceId("of:01");
     private static final DeviceId DID2 = DeviceId.deviceId("of:02");
     private static final DeviceId DID2 = DeviceId.deviceId("of:02");
@@ -54,8 +54,8 @@ public class DistributedDeviceMastershipStoreTest {
     private static final ControllerNode CN1 = new DefaultControllerNode(N1, IP);
     private static final ControllerNode CN1 = new DefaultControllerNode(N1, IP);
     private static final ControllerNode CN2 = new DefaultControllerNode(N2, IP);
     private static final ControllerNode CN2 = new DefaultControllerNode(N2, IP);
 
 
-    private DistributedDeviceMastershipStore dms;
-    private TestDistributedDeviceMastershipStore testStore;
+    private DistributedMastershipStore dms;
+    private TestDistributedMastershipStore testStore;
     private KryoSerializer serializationMgr;
     private KryoSerializer serializationMgr;
     private StoreManager storeMgr;
     private StoreManager storeMgr;
 
 
@@ -77,11 +77,11 @@ public class DistributedDeviceMastershipStoreTest {
 
 
         serializationMgr = new KryoSerializer();
         serializationMgr = new KryoSerializer();
 
 
-        dms = new TestDistributedDeviceMastershipStore(storeMgr, serializationMgr);
+        dms = new TestDistributedMastershipStore(storeMgr, serializationMgr);
         dms.clusterService = new TestClusterService();
         dms.clusterService = new TestClusterService();
         dms.activate();
         dms.activate();
 
 
-        testStore = (TestDistributedDeviceMastershipStore) dms;
+        testStore = (TestDistributedMastershipStore) dms;
     }
     }
 
 
     @After
     @After
@@ -133,7 +133,7 @@ public class DistributedDeviceMastershipStoreTest {
         assertEquals("wrong role for NONE:", MASTER, dms.requestRole(DID1));
         assertEquals("wrong role for NONE:", MASTER, dms.requestRole(DID1));
         assertTrue("wrong state for store:", !dms.terms.isEmpty());
         assertTrue("wrong state for store:", !dms.terms.isEmpty());
         assertEquals("wrong term",
         assertEquals("wrong term",
-                DeviceMastershipTerm.of(N1, 0), dms.getTermFor(DID1));
+                MastershipTerm.of(N1, 0), dms.getTermFor(DID1));
 
 
         //CN2 now local. DID2 has N1 as MASTER so N2 is STANDBY
         //CN2 now local. DID2 has N1 as MASTER so N2 is STANDBY
         testStore.setCurrent(CN2);
         testStore.setCurrent(CN2);
@@ -143,7 +143,7 @@ public class DistributedDeviceMastershipStoreTest {
         //change term and requestRole() again; should persist
         //change term and requestRole() again; should persist
         testStore.increment(DID2);
         testStore.increment(DID2);
         assertEquals("wrong role for STANDBY:", STANDBY, dms.requestRole(DID2));
         assertEquals("wrong role for STANDBY:", STANDBY, dms.requestRole(DID2));
-        assertEquals("wrong term", DeviceMastershipTerm.of(N1, 1), dms.getTermFor(DID2));
+        assertEquals("wrong term", MastershipTerm.of(N1, 1), dms.getTermFor(DID2));
     }
     }
 
 
     @Test
     @Test
@@ -155,15 +155,15 @@ public class DistributedDeviceMastershipStoreTest {
 
 
         //switch over to N2
         //switch over to N2
         assertEquals("wrong event:", Type.MASTER_CHANGED, dms.setMaster(N2, DID1).type());
         assertEquals("wrong event:", Type.MASTER_CHANGED, dms.setMaster(N2, DID1).type());
-        assertEquals("wrong term", DeviceMastershipTerm.of(N2, 1), dms.getTermFor(DID1));
+        assertEquals("wrong term", MastershipTerm.of(N2, 1), dms.getTermFor(DID1));
 
 
         //orphan switch - should be rare case
         //orphan switch - should be rare case
         assertEquals("wrong event:", Type.MASTER_CHANGED, dms.setMaster(N2, DID2).type());
         assertEquals("wrong event:", Type.MASTER_CHANGED, dms.setMaster(N2, DID2).type());
-        assertEquals("wrong term", DeviceMastershipTerm.of(N2, 0), dms.getTermFor(DID2));
+        assertEquals("wrong term", MastershipTerm.of(N2, 0), dms.getTermFor(DID2));
         //disconnect and reconnect - sign of failing re-election or single-instance channel
         //disconnect and reconnect - sign of failing re-election or single-instance channel
         testStore.reset(true, false, false);
         testStore.reset(true, false, false);
         dms.setMaster(N2, DID2);
         dms.setMaster(N2, DID2);
-        assertEquals("wrong term", DeviceMastershipTerm.of(N2, 1), dms.getTermFor(DID2));
+        assertEquals("wrong term", MastershipTerm.of(N2, 1), dms.getTermFor(DID2));
     }
     }
 
 
     @Test
     @Test
@@ -211,9 +211,9 @@ public class DistributedDeviceMastershipStoreTest {
         //shamelessly copy other distributed store tests
         //shamelessly copy other distributed store tests
         final CountDownLatch addLatch = new CountDownLatch(1);
         final CountDownLatch addLatch = new CountDownLatch(1);
 
 
-        DeviceMastershipStoreDelegate checkAdd = new DeviceMastershipStoreDelegate() {
+        MastershipStoreDelegate checkAdd = new MastershipStoreDelegate() {
             @Override
             @Override
-            public void notify(DeviceMastershipEvent event) {
+            public void notify(MastershipEvent event) {
                 assertEquals("wrong event:", Type.MASTER_CHANGED, event.type());
                 assertEquals("wrong event:", Type.MASTER_CHANGED, event.type());
                 assertEquals("wrong subject", DID1, event.subject());
                 assertEquals("wrong subject", DID1, event.subject());
                 assertEquals("wrong subject", N1, event.master());
                 assertEquals("wrong subject", N1, event.master());
@@ -227,9 +227,9 @@ public class DistributedDeviceMastershipStoreTest {
         assertTrue("Add event fired", addLatch.await(1, TimeUnit.SECONDS));
         assertTrue("Add event fired", addLatch.await(1, TimeUnit.SECONDS));
     }
     }
 
 
-    private class TestDistributedDeviceMastershipStore extends
-            DistributedDeviceMastershipStore {
-        public TestDistributedDeviceMastershipStore(StoreService storeService,
+    private class TestDistributedMastershipStore extends
+            DistributedMastershipStore {
+        public TestDistributedMastershipStore(StoreService storeService,
                 KryoSerializer kryoSerialization) {
                 KryoSerializer kryoSerialization) {
             this.storeService = storeService;
             this.storeService = storeService;
             this.serializer = kryoSerialization;
             this.serializer = kryoSerialization;

@@ -35,8 +35,8 @@
           <artifactId>hazelcast</artifactId>
           <artifactId>hazelcast</artifactId>
         </dependency>
         </dependency>
         <dependency>
         <dependency>
-          <groupId>de.javakaffee</groupId>
-          <artifactId>kryo-serializers</artifactId>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
         </dependency>
         </dependency>
     </dependencies>
     </dependencies>
 
 

@@ -23,11 +23,6 @@
         </dependency>
         </dependency>
         <dependency>
         <dependency>
             <groupId>org.onlab.onos</groupId>
             <groupId>org.onlab.onos</groupId>
-            <artifactId>onos-core-serializers</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.onlab.onos</groupId>
             <artifactId>onos-core-hz-common</artifactId>
             <artifactId>onos-core-hz-common</artifactId>
             <version>${project.version}</version>
             <version>${project.version}</version>
         </dependency>
         </dependency>
@@ -46,10 +41,6 @@
           <groupId>com.hazelcast</groupId>
           <groupId>com.hazelcast</groupId>
           <artifactId>hazelcast</artifactId>
           <artifactId>hazelcast</artifactId>
         </dependency>
         </dependency>
-        <dependency>
-          <groupId>de.javakaffee</groupId>
-          <artifactId>kryo-serializers</artifactId>
-        </dependency>
     </dependencies>
     </dependencies>
 
 
     <build>
     <build>

@@ -2,8 +2,8 @@ package org.onlab.onos.store.device.impl;
 
 
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 import org.onlab.onos.store.ClockProviderService;
 import org.onlab.onos.store.ClockProviderService;
 
 
 // FIXME: Code clone in onos-core-trivial, onos-core-hz-net
 // FIXME: Code clone in onos-core-trivial, onos-core-hz-net
@@ -15,6 +15,6 @@ import org.onlab.onos.store.ClockProviderService;
 public class NoOpClockProviderService implements ClockProviderService {
 public class NoOpClockProviderService implements ClockProviderService {
 
 
     @Override
     @Override
-    public void setMastershipTerm(DeviceId deviceId, DeviceMastershipTerm term) {
+    public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) {
     }
     }
 }
 }

 package org.onlab.onos.store.host.impl;
 package org.onlab.onos.store.host.impl;
 
 
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_ADDED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_MOVED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_REMOVED;
-import static org.onlab.onos.net.host.HostEvent.Type.HOST_UPDATED;
-import static org.slf4j.LoggerFactory.getLogger;
-
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Sets;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Deactivate;
 import org.apache.felix.scr.annotations.Service;
 import org.apache.felix.scr.annotations.Service;
+import org.onlab.onos.net.Annotations;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.DefaultHost;
 import org.onlab.onos.net.DefaultHost;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.DeviceId;
 import org.onlab.onos.net.Host;
 import org.onlab.onos.net.Host;
 import org.onlab.onos.net.HostId;
 import org.onlab.onos.net.HostId;
+import org.onlab.onos.net.HostLocation;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostEvent;
 import org.onlab.onos.net.host.HostEvent;
 import org.onlab.onos.net.host.HostStore;
 import org.onlab.onos.net.host.HostStore;
@@ -33,10 +27,13 @@ import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.packet.VlanId;
 import org.slf4j.Logger;
 import org.slf4j.Logger;
 
 
-import com.google.common.collect.HashMultimap;
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Multimap;
-import com.google.common.collect.Sets;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import static org.onlab.onos.net.host.HostEvent.Type.*;
+import static org.slf4j.LoggerFactory.getLogger;
 
 
 /**
 /**
  * TEMPORARY: Manages inventory of end-station hosts using distributed
  * TEMPORARY: Manages inventory of end-station hosts using distributed
@@ -46,13 +43,13 @@ import com.google.common.collect.Sets;
 @Component(immediate = true)
 @Component(immediate = true)
 @Service
 @Service
 public class DistributedHostStore
 public class DistributedHostStore
-extends AbstractStore<HostEvent, HostStoreDelegate>
-implements HostStore {
+        extends AbstractStore<HostEvent, HostStoreDelegate>
+        implements HostStore {
 
 
     private final Logger log = getLogger(getClass());
     private final Logger log = getLogger(getClass());
 
 
     // Host inventory
     // Host inventory
-    private final Map<HostId, Host> hosts = new ConcurrentHashMap<>();
+    private final Map<HostId, StoredHost> hosts = new ConcurrentHashMap<>(2000000, 0.75f, 16);
 
 
     // Hosts tracked by their location
     // Hosts tracked by their location
     private final Multimap<ConnectPoint, Host> locations = HashMultimap.create();
     private final Multimap<ConnectPoint, Host> locations = HashMultimap.create();
@@ -73,7 +70,7 @@ implements HostStore {
     @Override
     @Override
     public HostEvent createOrUpdateHost(ProviderId providerId, HostId hostId,
     public HostEvent createOrUpdateHost(ProviderId providerId, HostId hostId,
                                         HostDescription hostDescription) {
                                         HostDescription hostDescription) {
-        Host host = hosts.get(hostId);
+        StoredHost host = hosts.get(hostId);
         if (host == null) {
         if (host == null) {
             return createHost(providerId, hostId, hostDescription);
             return createHost(providerId, hostId, hostDescription);
         }
         }
@@ -83,11 +80,11 @@ implements HostStore {
     // creates a new host and sends HOST_ADDED
     // creates a new host and sends HOST_ADDED
     private HostEvent createHost(ProviderId providerId, HostId hostId,
     private HostEvent createHost(ProviderId providerId, HostId hostId,
                                  HostDescription descr) {
                                  HostDescription descr) {
-        DefaultHost newhost = new DefaultHost(providerId, hostId,
+        StoredHost newhost = new StoredHost(providerId, hostId,
                                             descr.hwAddress(),
                                             descr.hwAddress(),
                                             descr.vlan(),
                                             descr.vlan(),
                                             descr.location(),
                                             descr.location(),
-                descr.ipAddresses());
+                                            ImmutableSet.of(descr.ipAddress()));
         synchronized (this) {
         synchronized (this) {
             hosts.put(hostId, newhost);
             hosts.put(hostId, newhost);
             locations.put(descr.location(), newhost);
             locations.put(descr.location(), newhost);
@@ -96,28 +93,24 @@ implements HostStore {
     }
     }
 
 
     // checks for type of update to host, sends appropriate event
     // checks for type of update to host, sends appropriate event
-    private HostEvent updateHost(ProviderId providerId, Host host,
+    private HostEvent updateHost(ProviderId providerId, StoredHost host,
                                  HostDescription descr) {
                                  HostDescription descr) {
-        DefaultHost updated;
         HostEvent event;
         HostEvent event;
         if (!host.location().equals(descr.location())) {
         if (!host.location().equals(descr.location())) {
-            updated = new DefaultHost(providerId, host.id(),
-                    host.mac(),
-                    host.vlan(),
-                    descr.location(),
-                    host.ipAddresses());
-            event = new HostEvent(HOST_MOVED, updated);
+            host.setLocation(descr.location());
+            return new HostEvent(HOST_MOVED, host);
+        }
 
 
-        } else if (!(host.ipAddresses().equals(descr.ipAddresses()))) {
-            updated = new DefaultHost(providerId, host.id(),
-                    host.mac(),
-                    host.vlan(),
-                    descr.location(),
-                    descr.ipAddresses());
-            event = new HostEvent(HOST_UPDATED, updated);
-        } else {
+        if (host.ipAddresses().contains(descr.ipAddress())) {
             return null;
             return null;
         }
         }
+
+        Set<IpPrefix> addresses = new HashSet<>(host.ipAddresses());
+        addresses.add(descr.ipAddress());
+        StoredHost updated = new StoredHost(providerId, host.id(),
+                                            host.mac(), host.vlan(),
+                                            descr.location(), addresses);
+        event = new HostEvent(HOST_UPDATED, updated);
         synchronized (this) {
         synchronized (this) {
             hosts.put(host.id(), updated);
             hosts.put(host.id(), updated);
             locations.remove(host.location(), host);
             locations.remove(host.location(), host);
@@ -145,7 +138,7 @@ implements HostStore {
 
 
     @Override
     @Override
     public Iterable<Host> getHosts() {
     public Iterable<Host> getHosts() {
-        return Collections.unmodifiableSet(new HashSet<>(hosts.values()));
+        return ImmutableSet.<Host>copyOf(hosts.values());
     }
     }
 
 
     @Override
     @Override
@@ -275,4 +268,35 @@ implements HostStore {
         return addresses;
         return addresses;
     }
     }
 
 
+    // Auxiliary extension to allow location to mutate.
+    private class StoredHost extends DefaultHost {
+        private HostLocation location;
+
+        /**
+         * Creates an end-station host using the supplied information.
+         *
+         * @param providerId  provider identity
+         * @param id          host identifier
+         * @param mac         host MAC address
+         * @param vlan        host VLAN identifier
+         * @param location    host location
+         * @param ips         host IP addresses
+         * @param annotations optional key/value annotations
+         */
+        public StoredHost(ProviderId providerId, HostId id,
+                          MacAddress mac, VlanId vlan, HostLocation location,
+                          Set<IpPrefix> ips, Annotations... annotations) {
+            super(providerId, id, mac, vlan, location, ips, annotations);
+            this.location = location;
+        }
+
+        void setLocation(HostLocation location) {
+            this.location = location;
+        }
+
+        @Override
+        public HostLocation location() {
+            return location;
+        }
+    }
 }
 }

@@ -26,8 +26,13 @@
             <artifactId>org.apache.felix.scr.annotations</artifactId>
             <artifactId>org.apache.felix.scr.annotations</artifactId>
         </dependency>
         </dependency>
         <dependency>
         <dependency>
-          <groupId>de.javakaffee</groupId>
-          <artifactId>kryo-serializers</artifactId>
+            <groupId>com.esotericsoftware</groupId>
+            <artifactId>kryo</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava-testlib</artifactId>
+            <scope>test</scope>
         </dependency>
         </dependency>
     </dependencies>
     </dependencies>
 
 

@@ -7,6 +7,7 @@ import java.util.HashMap;
 
 
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.ControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
 import org.onlab.onos.cluster.DefaultControllerNode;
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.DefaultAnnotations;
 import org.onlab.onos.net.DefaultAnnotations;
@@ -23,14 +24,12 @@ import org.onlab.onos.net.Port;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.device.DefaultDeviceDescription;
 import org.onlab.onos.net.device.DefaultDeviceDescription;
 import org.onlab.onos.net.device.DefaultPortDescription;
 import org.onlab.onos.net.device.DefaultPortDescription;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.onos.store.Timestamp;
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.IpPrefix;
 import org.onlab.packet.IpPrefix;
 import org.onlab.util.KryoPool;
 import org.onlab.util.KryoPool;
 
 
-import de.javakaffee.kryoserializers.URISerializer;
-
 public final class KryoPoolUtil {
 public final class KryoPoolUtil {
 
 
     /**
     /**
@@ -63,7 +62,9 @@ public final class KryoPoolUtil {
                     Port.class,
                     Port.class,
                     DefaultPortDescription.class,
                     DefaultPortDescription.class,
                     Element.class,
                     Element.class,
-                    Link.Type.class
+                    Link.Type.class,
+                    Timestamp.class
+
                     )
                     )
             .register(URI.class, new URISerializer())
             .register(URI.class, new URISerializer())
             .register(NodeId.class, new NodeIdSerializer())
             .register(NodeId.class, new NodeIdSerializer())
@@ -74,7 +75,7 @@ public final class KryoPoolUtil {
             .register(LinkKey.class, new LinkKeySerializer())
             .register(LinkKey.class, new LinkKeySerializer())
             .register(ConnectPoint.class, new ConnectPointSerializer())
             .register(ConnectPoint.class, new ConnectPointSerializer())
             .register(DefaultLink.class, new DefaultLinkSerializer())
             .register(DefaultLink.class, new DefaultLinkSerializer())
-            .register(DeviceMastershipTerm.class, new MastershipTermSerializer())
+            .register(MastershipTerm.class, new MastershipTermSerializer())
             .register(MastershipRole.class, new MastershipRoleSerializer())
             .register(MastershipRole.class, new MastershipRoleSerializer())
 
 
             .build();
             .build();

 package org.onlab.onos.store.serializers;
 package org.onlab.onos.store.serializers;
 
 
 import org.onlab.util.KryoPool;
 import org.onlab.util.KryoPool;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.nio.ByteBuffer;
 import java.nio.ByteBuffer;
 
 
 /**
 /**
@@ -11,10 +8,8 @@ import java.nio.ByteBuffer;
  */
  */
 public class KryoSerializer implements StoreSerializer {
 public class KryoSerializer implements StoreSerializer {
 
 
-    private final Logger log = LoggerFactory.getLogger(getClass());
     protected KryoPool serializerPool;
     protected KryoPool serializerPool;
 
 
-
     public KryoSerializer() {
     public KryoSerializer() {
         setupKryoPool();
         setupKryoPool();
     }
     }

 package org.onlab.onos.store.serializers;
 package org.onlab.onos.store.serializers;
 
 
+import org.onlab.onos.cluster.MastershipTerm;
 import org.onlab.onos.cluster.NodeId;
 import org.onlab.onos.cluster.NodeId;
-import org.onlab.onos.net.device.DeviceMastershipTerm;
-
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.io.Input;
 import com.esotericsoftware.kryo.io.Input;
 import com.esotericsoftware.kryo.io.Output;
 import com.esotericsoftware.kryo.io.Output;
 
 
 /**
 /**
- * Kryo Serializer for {@link org.onlab.onos.net.device.DeviceMastershipTerm}.
+ * Kryo Serializer for {@link org.onlab.onos.cluster.MastershipTerm}.
  */
  */
-public class MastershipTermSerializer extends Serializer<DeviceMastershipTerm> {
+public class MastershipTermSerializer extends Serializer<MastershipTerm> {
 
 
     /**
     /**
-     * Creates {@link DeviceMastershipTerm} serializer instance.
+     * Creates {@link MastershipTerm} serializer instance.
      */
      */
     public MastershipTermSerializer() {
     public MastershipTermSerializer() {
         // non-null, immutable
         // non-null, immutable
@@ -22,14 +21,14 @@ public class MastershipTermSerializer extends Serializer<DeviceMastershipTerm> {
     }
     }
 
 
     @Override
     @Override
-    public DeviceMastershipTerm read(Kryo kryo, Input input, Class<DeviceMastershipTerm> type) {
+    public MastershipTerm read(Kryo kryo, Input input, Class<MastershipTerm> type) {
         final NodeId node = new NodeId(input.readString());
         final NodeId node = new NodeId(input.readString());
         final int term = input.readInt();
         final int term = input.readInt();
-        return DeviceMastershipTerm.of(node, term);
+        return MastershipTerm.of(node, term);
     }
     }
 
 
     @Override
     @Override
-    public void write(Kryo kryo, Output output, DeviceMastershipTerm object) {
+    public void write(Kryo kryo, Output output, MastershipTerm object) {
         output.writeString(object.master().toString());
         output.writeString(object.master().toString());
         output.writeInt(object.termNumber());
         output.writeInt(object.termNumber());
     }
     }

+package org.onlab.onos.store.serializers;
+
+import java.net.URI;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+
+/**
+ * Serializer for {@link URI}.
+ */
+public class URISerializer extends Serializer<URI> {
+
+    /**
+     * Creates {@link URI} serializer instance.
+     */
+    public URISerializer() {
+        super(false);
+    }
+
+    @Override
+    public void write(Kryo kryo, Output output, URI object) {
+        output.writeString(object.toString());
+    }
+
+    @Override
+    public URI read(Kryo kryo, Input input, Class<URI> type) {
+        return URI.create(input.readString());
+    }
+}