topicsendclient.java

来自「jboss 的官方实例程序」· Java 代码 · 共 77 行

package org.jboss.book.jms.ex1;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSubscriber;
import javax.jms.TopicSession;
import javax.jms.TextMessage;
import javax.naming.InitialContext;
import javax.naming.NamingException;

/** A JMS client example program that sends a TextMessage to a Topic
 *
 * @author  [e-mail]
 * @version $Revision: 1.1 $
 */
public class TopicSendClient
{
    TopicConnection  conn = null;
    TopicSession session = null;
    Topic topic = null;
    
    public void setupPubSub()
        throws JMSException, 
               NamingException
    {
        InitialContext iniCtx = new InitialContext();
        Object tmp = iniCtx.lookup("ConnectionFactory");
        TopicConnectionFactory tcf = (TopicConnectionFactory) tmp;
        conn = tcf.createTopicConnection();
        topic = (Topic) iniCtx.lookup("topic/testTopic");
        session = conn.createTopicSession(false,
                                          TopicSession.AUTO_ACKNOWLEDGE);
        conn.start();
    }
    
    public void sendAsync(String text)
        throws JMSException, 
               NamingException
    {
        System.out.println("Begin sendAsync");
        // Setup the pub/sub connection, session
        setupPubSub();

        // Send a text msg
        TopicPublisher send = session.createPublisher(topic);
        TextMessage tm = session.createTextMessage(text);
        send.publish(tm);
        System.out.println("sendAsync, sent text=" + tm.getText());
        send.close();
        System.out.println("End sendAsync");
    }
    
    public void stop() 
        throws JMSException
    {
        conn.stop();
        session.close();
        conn.close();
    }
    
    public static void main(String args[]) throws Exception
    {
        System.out.println("Begin TopicSendClient, now="+System.currentTimeMillis());

        TopicSendClient client = new TopicSendClient();
        client.sendAsync("A text msg, now="+System.currentTimeMillis());
        client.stop();
        System.out.println("End TopicSendClient");
        System.exit(0);
    }
}