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;
26 import net.java.html.json.ComputedProperty;
27 import net.java.html.json.Function;
28 import net.java.html.json.Model;
29 import net.java.html.json.OnReceive;
30 import net.java.html.json.Property;
31 import org.apidesign.demo.chat.shared.Message;
32 import org.apidesign.demo.chat.shared.Query;
33 import org.apidesign.demo.chat.shared.Reply;
37 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
39 @Model(className = "ChatModel", targetId = "", properties = {
40 @Property(name = "user", type = String.class),
41 @Property(name = "comment", type = String.class),
42 @Property(name = "url", type = String.class),
43 @Property(name = "msgs", type = Message.class, array = true)
47 static boolean sendEnabled(String user, String comment) {
48 boolean res = user != null && comment != null && !user.isEmpty() && !comment.isEmpty();
53 static void submit(ChatModel m) {
54 if (!sendEnabled(m.getUser(), m.getComment())) {
57 Message msg = new Message();
58 msg.setUser(m.getUser());
59 msg.setComment(m.getComment());
60 m.socket(m.getUrl(), new Query().assignPost(msg));
63 static void cantChat(ChatModel model, Exception err) {
64 model.getMsgs().add(new Message("System", err.getMessage(), 0));
68 @OnReceive(url = "{url}/chat", method = "WebSocket", data = Query.class, onError = "cantChat")
69 static void socket(ChatModel m, Reply reply) {
71 m.getMsgs().add(new Message("System", "Connected to server at " + m.getUrl() + "/chat!", 0));
75 m.getMsgs().addAll(reply.getMessages());
78 public static void onPageLoad() {
79 ChatModel chm = new ChatModel();
80 chm.setUrl("ws://localhost:8080");
81 Message m = new Message("System", "Waiting for messages from the server...", 0);
84 chm.socket(chm.getUrl(), null);