cleaned-up to give better help and javadoc

@@ -4,8 +4,6 @@ import java.io.IOException;
 
 import org.onlab.netty.Message;
 import org.onlab.netty.MessageHandler;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 
 /**
@@ -13,11 +11,8 @@ import org.slf4j.LoggerFactory;
  */
 public class NettyEchoHandler implements MessageHandler {
 
-    private final Logger log = LoggerFactory.getLogger(getClass());
-
     @Override
     public void handle(Message message) throws IOException {
-        //log.info("Received message. Echoing it back to the sender.");
         message.respond(message.payload());
     }
 }

+package org.onlab.onos.foo;
+
+import org.onlab.netty.Message;
+import org.onlab.netty.MessageHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A MessageHandler that simply logs the information.
+ */
+public class NettyNothingHandler implements MessageHandler {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    @Override
+    public void handle(Message message) {
+      // Do nothing
+    }
+}

@@ -2,6 +2,7 @@ package org.onlab.onos.foo;
 
 import java.io.IOException;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
 import org.onlab.metrics.MetricsComponent;
@@ -15,14 +16,29 @@ import org.slf4j.LoggerFactory;
 
 import com.codahale.metrics.Timer;
 
+/**
+ * The Simple netty client test.
+ */
 // FIXME: Should be move out to test or app
 public final class SimpleNettyClient {
 
 private static Logger log = LoggerFactory.getLogger(SimpleNettyClient.class);
 
+    static NettyMessagingService messaging;
+    static MetricsManager metrics;
+
         private SimpleNettyClient() {
     }
 
+    /**
+     * The entry point of application.
+     *
+     * @param args the input arguments
+     * @throws IOException the iO exception
+     * @throws InterruptedException the interrupted exception
+     * @throws ExecutionException the execution exception
+     * @throws TimeoutException the timeout exception
+     */
     public static void main(String[] args)
             throws IOException, InterruptedException, ExecutionException,
             TimeoutException {
@@ -34,13 +50,20 @@ private static Logger log = LoggerFactory.getLogger(SimpleNettyClient.class);
 
         System.exit(0);
     }
+
+    /**
+     * Start standalone.
+     *
+     * @param args the args
+     * @throws Exception the exception
+     */
     public static void startStandalone(String[] args) throws Exception {
         String host = args.length > 0 ? args[0] : "localhost";
         int port = args.length > 1 ? Integer.parseInt(args[1]) : 8081;
         int warmup = args.length > 2 ? Integer.parseInt(args[2]) : 1000;
         int iterations = args.length > 3 ? Integer.parseInt(args[3]) : 50 * 100000;
-        NettyMessagingService messaging = new TestNettyMessagingService(9081);
-        MetricsManager metrics = new MetricsManager();
+        messaging = new TestNettyMessagingService(9081);
+        metrics = new MetricsManager();
         Endpoint endpoint = new Endpoint(host, port);
         messaging.activate();
         metrics.activate();
@@ -53,6 +76,7 @@ private static Logger log = LoggerFactory.getLogger(SimpleNettyClient.class);
             Response response = messaging
                     .sendAndReceive(endpoint, "echo",
                             "Hello World".getBytes());
+            response.get(100000, TimeUnit.MILLISECONDS);
         }
 
         log.info("measuring async sender");
@@ -64,19 +88,47 @@ private static Logger log = LoggerFactory.getLogger(SimpleNettyClient.class);
             context.stop();
         }
 
+        log.info("measuring round-trip send & receive");
         Timer sendAndReceiveTimer = metrics.createTimer(component, feature, "SendAndReceive");
+        int timeouts = 0;
+
         for (int i = 0; i < iterations; i++) {
+            Response response;
             Timer.Context context = sendAndReceiveTimer.time();
-            Response response = messaging
+            try {
+                response = messaging
                         .sendAndReceive(endpoint, "echo",
                                 "Hello World".getBytes());
-            // System.out.println("Got back:" + new String(response.get(2, TimeUnit.SECONDS)));
+                response.get(10000, TimeUnit.MILLISECONDS);
+            } catch (TimeoutException e) {
+                timeouts++;
+                log.info("timeout:" + timeouts + " at iteration:" + i);
+            } finally {
                 context.stop();
             }
+            // System.out.println("Got back:" + new String(response.get(2, TimeUnit.SECONDS)));
+        }
+    }
+
+    public static void stop() {
+        try {
+            messaging.deactivate();
             metrics.deactivate();
+        } catch (Exception e) {
+            log.info("Unable to stop client %s", e);
+        }
     }
 
+    /**
+     * The type Test netty messaging service.
+     */
     public static class TestNettyMessagingService extends NettyMessagingService {
+        /**
+         * Instantiates a new Test netty messaging service.
+         *
+         * @param port the port
+         * @throws Exception the exception
+         */
         public TestNettyMessagingService(int port) throws Exception {
             super(port);
         }

 package org.onlab.onos.foo;
 
 import static org.onlab.onos.foo.SimpleNettyClient.startStandalone;
+import static org.onlab.onos.foo.SimpleNettyClient.stop;
 
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
@@ -24,11 +25,11 @@ public class SimpleNettyClientCommand extends AbstractShellCommand {
 
     @Argument(index = 2, name = "warmupCount", description = "Warm-up count",
             required = false, multiValued = false)
-    String warmupCount = "1000";
+    String warmupCount = "10000";
 
     @Argument(index = 3, name = "messageCount", description = "Message count",
             required = false, multiValued = false)
-    String messageCount = "100000";
+    String messageCount = "1000000";
 
     @Override
     protected void execute() {
@@ -37,5 +38,6 @@ public class SimpleNettyClientCommand extends AbstractShellCommand {
         } catch (Exception e) {
             error("Unable to start client %s", e);
         }
+        stop();
     }
 }

@@ -12,17 +12,30 @@ import org.slf4j.LoggerFactory;
 
             private SimpleNettyServer() {}
 
+    /**
+     * The entry point of application.
+     *
+     * @param args the input arguments
+     * @throws Exception the exception
+     */
     public static void main(String... args) throws Exception {
                 startStandalone(args);
                 System.exit(0);
             }
 
+    /**
+     * Start standalone server.
+     *
+     * @param args the args
+     * @throws Exception the exception
+     */
     public static void startStandalone(String[] args) throws Exception {
             int port = args.length > 0 ? Integer.parseInt(args[0]) : 8081;
             NettyMessagingService server = new NettyMessagingService(port);
             server.activate();
-            server.registerHandler("simple", new NettyLoggingHandler());
+            server.registerHandler("simple", new NettyNothingHandler());
             server.registerHandler("echo", new NettyEchoHandler());
+            log.info("Netty Server server on port " + port);
         }
     }