これは何?

webscoket.png

WebSocketEndpoint?


https://github.com/kagyuu/WebSocketExam/blob/master/src/main/java/com/mycompany/websocketexam/WebSocketEndpoint.java

package com.mycompany.websocketexam;

import java.io.IOException;
import java.io.Serializable;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.ejb.EJB;
import javax.enterprise.event.Observes;
import javax.jms.JMSException;
import javax.jms.Message;
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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@ServerEndpoint("/websocket")
public class WebSocketEndpoint implements Serializable {

    private static final Logger logger 
            = LoggerFactory.getLogger(WebSocketEndpoint.class);

    @EJB
    private QueueSenderSessionBean senderBean;
    
    private static final Set<Session> sessions 
            = Collections.synchronizedSet(new HashSet<Session>());

    @OnOpen
    public void onOpen(final Session session) {
        logger.info("Session Open {}", session.getId());
        session.getAsyncRemote().sendText("Session Opened");
        sessions.add(session);
    }

    @OnMessage
    public void onMessage(final String message, final Session client) {
        logger.info("Call QueueSenderSessionBean");
        senderBean.sendMessage(message);
    }

    @OnClose
    public void onClose(final Session session) {
        logger.info("Session Close {}", session.getId());
        sessions.remove(session);
    }

    @OnError
    public void onError(Throwable t) {
        logger.error("Error", t);
    }

    public void onJMSMessage(@Observes @WSJMSMessage Message msg) {
        logger.info("Receive CDI Event {}", msg);

        sessions.forEach(s -> {
            try {
                s.getBasicRemote().sendText(msg.getBody(String.class));
            } catch (IOException | JMSException ex) {
                logger.error("Error", ex);
            }
        });

    }
}

https://github.com/kagyuu/WebSocketExam/blob/master/src/main/java/com/mycompany/websocketexam/WSJMSMessage.java

package com.mycompany.websocketexam;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import javax.inject.Qualifier;

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.TYPE})
public @interface WSJMSMessage {
}

QueueSenderSessionBean?


https://github.com/kagyuu/WebSocketExam/blob/master/src/main/java/com/mycompany/websocketexam/QueueSenderSessionBean.java

package com.mycompany.websocketexam;

import javax.annotation.Resource;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.jms.JMSContext;
import javax.jms.Queue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@LocalBean
@Stateless
public class QueueSenderSessionBean {

    private static final Logger logger 
            = LoggerFactory.getLogger(QueueSenderSessionBean.class);

    @Resource(mappedName = "jms/myQueue")    
    private Queue myQueue;

    @Inject
    private JMSContext jmsContext;

    public void sendMessage(String message) {
        logger.info("Enqueu Message to JMS");        
        jmsContext.createProducer().send(myQueue, message);
    }

}

WebSocketMDB


https://github.com/kagyuu/WebSocketExam/blob/master/src/main/java/com/mycompany/websocketexam/WebSocketMDB.java

package com.mycompany.websocketexam;

import javax.ejb.MessageDriven;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.enterprise.event.Event;
import javax.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@MessageDriven(mappedName = "jms/myQueue")
public class WebSocketMDB implements MessageListener {
    
    private static final Logger logger 
            = LoggerFactory.getLogger(WebSocketMDB.class);

    @Inject
    @WSJMSMessage
    private Event<Message> jmsEvent;

    @Override
    public void onMessage(Message msg) {
        logger.info("Fire CDI Event");
        jmsEvent.fire(msg);
    }
}

index.html(WebSocket?クライアント)

https://github.com/kagyuu/WebSocketExam/blob/master/src/main/webapp/index.html

<!DOCTYPE html>
<html>
    <head>
        <title>Start Page</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    </head>
    <body>
<h1>WebSocketテスト</h1>
<div id="log">
</div>
<input id="msg" type="text"/>
<button id="send">送信</button>        
        
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<script type="text/javascript">

var socket = new WebSocket('ws://' + document.location.host + document.location.pathname +'websocket');

socket.onmessage = function(message){
    $('#log').append(message.data + "<br/>");
};

$('#send').click(function(){
    var text = $('#msg').val();
    socket.send(text);
    $('#msg').val('');
});
</script>
    </body>
</html>

実行イメージ

sc01.png
情報:   2015-09-10 01:33:34,165 [http-listener-1(2)] INFO  c.m.w.WebSocketEndpoint Session Open 89907c41-c5d1-4834-bc91-6b51f81b061c
情報:   2015-09-10 01:33:42,203 [http-listener-1(3)] INFO  c.m.w.WebSocketEndpoint Call QueueSenderSessionBean
情報:   2015-09-10 01:33:42,283 [http-listener-1(3)] INFO  c.m.w.QueueSenderSessionBean Enqueu Message to JMS
情報:   2015-09-10 01:33:42,487 [p: thread-pool-1; w: 5] INFO  c.m.w.WebSocketMDB   Fire CDI Event
情報:   2015-09-10 01:33:42,488 [p: thread-pool-1; w: 5] INFO  c.m.w.WebSocketEndpoint Receive CDI Event com.sun.messaging.jms.ra.DirectTextPacket@4a68d6
情報:   2015-09-10 01:33:46,425 [http-listener-1(4)] INFO  c.m.w.WebSocketEndpoint Call QueueSenderSessionBean
情報:   2015-09-10 01:33:46,426 [http-listener-1(4)] INFO  c.m.w.QueueSenderSessionBean Enqueu Message to JMS
情報:   2015-09-10 01:33:46,433 [p: thread-pool-1; w: 1] INFO  c.m.w.WebSocketMDB   Fire CDI Event
情報:   2015-09-10 01:33:46,433 [p: thread-pool-1; w: 1] INFO  c.m.w.WebSocketEndpoint Receive CDI Event com.sun.messaging.jms.ra.DirectTextPacket@170bae7e
情報:   2015-09-10 01:34:12,804 [http-listener-1(5)] INFO  c.m.w.WebSocketEndpoint Session Close 89907c41-c5d1-4834-bc91-6b51f81b061c

Java#Glassfish


添付ファイル: filesc01.png 107件 [詳細] filewebscoket.png 107件 [詳細]

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Last-modified: 2015-09-10 (木) 01:35:47 (451d)
ISBN10
ISBN13
9784061426061