update ApolloClient Setting

-import ApolloClient from "apollo-boost";
+import { ApolloClient } from "apollo-client";
+import { InMemoryCache } from "apollo-cache-inmemory";
+import { HttpLink } from "apollo-link-http";
+import { WebSocketLink } from "apollo-link-ws";
+import { onError } from "apollo-link-error";
+import { ApolloLink, split } from "apollo-link";
+import { getMainDefinition } from "apollo-utilities";
+import { withClientState } from "apollo-link-state";
 import { defaults, resolvers } from "./ClientState";
 import { defaults, resolvers } from "./ClientState";
+import { setContext } from "apollo-link-context";
 
 
-export default new ApolloClient({
+const httpLink = new HttpLink({
   uri: "http://localhost:4000",
   uri: "http://localhost:4000",
-  clientState: {
-    defaults,
-    resolvers,
-  },
-  headers: {
-    Authorization: `Bearer ${localStorage.getItem("token")}`,
+});
+
+const wsLink = new WebSocketLink({
+  uri: "ws://localhost:4000",
+  options: {
+    reconnect: true,
   },
   },
 });
 });
+
+const setAuthorizationLink = setContext((request, previousContext) => ({
+  headers: { Authorization: `Bearer ${localStorage.getItem("token")}` },
+}));
+
+const clientState = withClientState({
+  defaults,
+  resolvers,
+});
+
+const client = new ApolloClient({
+  link: ApolloLink.from([
+    onError(({ graphQLErrors, networkError }) => {
+      if (graphQLErrors)
+        graphQLErrors.map(({ message, locations, path }) =>
+          console.log(
+            `[GraphQL error]: Message: ${message}, Location: ${locations}, Path: ${path}`
+          )
+        );
+      if (networkError) console.log(`[Network error]: ${networkError}`);
+    }),
+    setAuthorizationLink,
+    clientState,
+    split(
+      ({ query }) => {
+        const definition = getMainDefinition(query);
+        return (
+          definition.kind === "OperationDefinition" &&
+          definition.operation === "subscription"
+        );
+      },
+      wsLink,
+      httpLink
+    ),
+  ]),
+  cache: new InMemoryCache(),
+});
+export default client;