chitan/WsChat.html

## WsChat.html
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Tomcat WebSocket Chat</title>
        <script>
            var ws = new WebSocket("ws://localhost:8080/WsChat/wschat");
            ws.onopen = function(){
            };
            ws.onmessage = function(message){
                document.getElementById("chatlog").textContent += message.data + "\n";
            };
            function postToServer(){
                ws.send(document.getElementById("msg").value);
                document.getElementById("msg").value = "";
            }
            function closeConnect(){
                ws.close();
            }
        </script>
    </head>
    <body>
        <textarea id="chatlog" readonly></textarea><br/>
        <input id="msg" type="text" />
        <button type="submit" id="sendButton" onClick="postToServer()">Send!</button>
        <button type="submit" id="sendButton" onClick="closeConnect()">End</button>
    </body>
</html>

## WsChat.java
//This sample is how to use websocket of Tomcat7.0.52.
//web.xml is not required. Because you can use Servlet3.0 Annotation.
package wsapp;

import java.io.IOException;
import java.util.ArrayList;

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

@ServerEndpoint(value = "/wschat")
public class WsChat{
    //notice:not thread-safe
    private static ArrayList<Session> sessionList = new ArrayList<Session>();

    @OnOpen
    public void onOpen(Session session){
        try{
            sessionList.add(session);
            //asynchronous communication
            session.getBasicRemote().sendText("Hello!");
        }catch(IOException e){}
    }

    @OnClose
    public void onClose(Session session){
        sessionList.remove(session);
    }

    @OnMessage
    public void onMessage(String msg){
        try{
            for(Session session : sessionList){
                //asynchronous communication
                session.getBasicRemote().sendText(msg);
            }
        }catch(IOException e){}
    }
}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Tomcat WebSocket Chat</title>
	<script>
	var ws = new WebSocket("ws://localhost:8080/WsChat/wschat");
	ws.onopen = function(){
	};
	ws.onmessage = function(message){
	document.getElementById("chatlog").textContent += message.data + "\n";
	};
	function postToServer(){
	ws.send(document.getElementById("msg").value);
	document.getElementById("msg").value = "";
	}
	function closeConnect(){
	ws.close();
	}
	</script>
	</head>
	<body>
	<textarea id="chatlog" readonly></textarea><br/>
	<input id="msg" type="text" />
	<button type="submit" id="sendButton" onClick="postToServer()">Send!</button>
	<button type="submit" id="sendButton" onClick="closeConnect()">End</button>
	</body>
	</html>
	//This sample is how to use websocket of Tomcat7.0.52.
	//web.xml is not required. Because you can use Servlet3.0 Annotation.
	package wsapp;

	import java.io.IOException;
	import java.util.ArrayList;

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

	@ServerEndpoint(value = "/wschat")
	public class WsChat{
	//notice:not thread-safe
	private static ArrayList<Session> sessionList = new ArrayList<Session>();

	@OnOpen
	public void onOpen(Session session){
	try{
	sessionList.add(session);
	//asynchronous communication
	session.getBasicRemote().sendText("Hello!");
	}catch(IOException e){}
	}

	@OnClose
	public void onClose(Session session){
	sessionList.remove(session);
	}

	@OnMessage
	public void onMessage(String msg){
	try{
	for(Session session : sessionList){
	//asynchronous communication
	session.getBasicRemote().sendText(msg);
	}
	}catch(IOException e){}
	}
	}