Using WebSocket on the client and on the server while keeping their ability to talk to each other
2 * The MIT License (MIT)
4 * Copyright (C) 2013 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 package org.apidesign.demo.chat.server;
26 import java.util.ArrayList;
27 import java.util.List;
28 import java.util.logging.Logger;
29 import org.apidesign.demo.chat.shared.Message;
30 import org.glassfish.grizzly.websockets.WebSocket;
31 import org.glassfish.grizzly.websockets.WebSocketApplication;
33 /** Server side of the chat application.*/
34 public final class ChatServerResource extends WebSocketApplication {
35 private static final Logger LOG = Logger.getLogger(ChatServerResource.class.getName());
36 private static final long started = System.currentTimeMillis() - 10;
38 private List<Message> msgs = new ArrayList<>();
40 Message welcome = new Message();
41 welcome.setUser("system");
42 welcome.setComment("Welcome and enjoy!");
49 private final Map<AsyncResponse, Long> awaiting = new IdentityHashMap<>();
51 @Produces(MediaType.APPLICATION_JSON)
52 @GET public synchronized void getResources(
53 @QueryParam("since") @DefaultValue("0") long since,
54 @Suspended AsyncResponse ar
56 Query q = new Query();
57 for (Message m : msgs) {
58 if (m.getSince()>= since) {
59 q.getMessages().add(m);
62 if (!q.getMessages().isEmpty()) {
65 awaiting.put(ar, since);
69 private void handleAwaiting(long newest) {
70 assert Thread.holdsLock(this);
72 for (Map.Entry<AsyncResponse, Long> entry : awaiting.entrySet()) {
73 AsyncResponse ar = entry.getKey();
74 Long since = entry.getValue();
75 if (since <= newest) {
77 getResources(since, ar);
85 @POST @Consumes(value = MediaType.APPLICATION_JSON)
86 public synchronized Message publish(Message msg) {
87 msg.setSince(System.currentTimeMillis() - started);
89 handleAwaiting(msg.getSince());
95 public void onMessage(WebSocket socket, String text) {
96 super.onMessage(socket, text);