web socket

来源：互联网发布：天勤行情数据怎么样编辑：程序博客网时间：2024/06/10 01:18

xhtml web page

<?xml version="1.0" encoding="UTF-8"?>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Web Socket Test</title>
<style type="text/css"><![CDATA[
#console-container {
width: 400px;
}

#console {
border: 1px solid #CCCCCC;
border-right-color: #999999;
border-bottom-color: #999999;
height: 170px;
overflow-y: scroll;
padding: 5px;
width: 100%;
}

#console p {
padding: 0;
margin: 0;
}
]]></style>
<script type="application/javascript"><![CDATA[
var Chat = {};

Chat.socket = null;

Chat.connect = (function(host) {
if ('WebSocket' in window) {
Chat.socket = new WebSocket(host);
} else if ('MozWebSocket' in window) {
Chat.socket = new MozWebSocket(host);
} else {
Console.log('Error: WebSocket is not supported by this browser.');
return;
}

Chat.socket.onopen = function () {
};

Chat.socket.onclose = function () {
};

Chat.socket.onmessage = function (message) {
Console.log(message.data);
};
});

Chat.initialize = function() {
if (window.location.protocol == 'http:') {
Chat.connect('ws://' + window.location.host + '/JavaWebApp20140310/websocket/chat');
} else {
Chat.connect('wss://' + window.location.host + '/JavaWebApp20140310/websocket/chat');
}
};

Chat.sendMessage = (function() {
});

var Console = {};

Console.log = (function(message) {
var console = document.getElementById('console');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.innerHTML = message;
console.appendChild(p);
while (console.childNodes.length > 25) {
console.removeChild(console.firstChild);
}
console.scrollTop = console.scrollHeight;
});

Chat.initialize();

document.addEventListener("DOMContentLoaded", function() {
// Remove elements with "noscript" class - <noscript> is not allowed in XHTML
var noscripts = document.getElementsByClassName("noscript");
for (var i = 0; i < noscripts.length; i++) {
noscripts[i].parentNode.removeChild(noscripts[i]);
}
}, false);

]]></script>
</head>
<body>
<div class="noscript"><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
Javascript and reload this page!</h2></div>
<div>
<div id="console-container">
<div id="console"/>
</div>
</div>
</body>
</html>

java code:

package websocket.chat;

import java.io.IOException;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.atomic.AtomicInteger;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;

@ServerEndpoint(value = "/websocket/chat")
public class ChatAnnotation {

private static final AtomicInteger connectionIds = new AtomicInteger(0);
private static final Set<ChatAnnotation> connections =
new CopyOnWriteArraySet<ChatAnnotation>();

private Session session;

public ChatAnnotation() {

}

@OnOpen
public void start(Session session) {

this.session = session;
connections.add(this);

System.out.println("############## start ###################");

broadcast("Start now......");


}

@OnClose
public void end() {
System.out.println("############## end ###################");
}

@OnMessage
public void incoming(String message) {

broadcast("incoming messages......");
}


@OnError
public void onError(Throwable t) throws Throwable {
}

private static void broadcast(String msg) {
if (msg == null)
msg = "msg error in broadcast!!!";
for (ChatAnnotation client : connections) {
try {
synchronized (client) {
client.session.getBasicRemote().sendText(msg);
}

// client.session.getBasicRemote().sendText(client.session.getId());
} catch (IOException e) {
connections.remove(client);
try {
client.session.close();
} catch (IOException e1) {
// Ignore
}
}
}
}
}

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