jboss4官方jms程序(Pub-Sub)

两个类：

TopicRecvClient.java(接收类subscriber)

TopicSendClient.java(发送类publisher)

 

TopicRecvClient.java:

package com.rox.jms;
import java.util.Properties;
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.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
/** *//**
 * A JMS client example program that synchronously receives a message a Topic
 * 
 * 
 * @author Scott.Stark@jboss.org
 * 
 * @version $Revision:$
 * 
 */
public class TopicRecvClient
...{
    TopicConnection conn = null;
    TopicSession session = null;
    Topic topic = null;
    public void setupPubSub()
    throws JMSException, NamingException
    ...{
        Properties environment = new Properties();
        environment.put(Context.PROVIDER_URL, "localhost:1099");
        environment.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
        InitialContext iniCtx = new InitialContext(environment);
        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 recvSync()
    throws JMSException, NamingException
    ...{
        System.out.println("Begin recvSync");
        // Setup the pub/sub connection, session
        setupPubSub();
        // Wait upto 5 seconds for the message
        TopicSubscriber recv = session.createSubscriber(topic);
        Message msg = recv.receive(5000);
        if (msg == null)
            System.out.println("Timed out waiting for msg");
        else
            System.out.println("TopicSubscriber.recv, msgt=" + msg);
    }
    public void stop() throws JMSException
    ...{
        conn.stop();
        session.close();
        conn.close();
    }
    public static void main(String args[]) throws Exception
    ...{
        System.out.println("Begin TopicRecvClient, now="
                + System.currentTimeMillis());
        TopicRecvClient client = new TopicRecvClient();
        client.recvSync();
        client.stop();
        System.out.println("End TopicRecvClient");
        System.exit(0);
    }
}

TopicSendClient.java:

package com.rox.jms;
import java.util.Properties;
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.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
/** *//**
 * A JMS client example program that sends a TextMessage to a Topic
 * 
 * 
 * @author Scott.Stark@jboss.org
 * 
 * @version $Revision:$
 * 
 */
public class TopicSendClient
...{
    TopicConnection conn = null;
    TopicSession session = null;
    Topic topic = null;
    public void setupPubSub()
    throws JMSException, NamingException
    ...{
        Properties environment = new Properties();
        environment.put(Context.PROVIDER_URL, "localhost:1099");
        environment.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
        InitialContext iniCtx = new InitialContext(environment);
        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);
    }
}

　　运行的时候先运行TopicRecvClient,然后迅速(5000毫秒之内)运行TopicSendClient,会看到 TopicRecvClient的控制台中出现接收的信息．topic的消息只能在发送的时候接收到，如果再发送之后再去接收是收不到任何信息的．

　　还有一种介于p2p和pub2sub之间的一种jms类型(durable pub2sub),写一个java类：

DurableTopicRecvClient.java:

package com.rox.jms;
import java.util.Properties;
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.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
/** *//**
 * A JMS client example program that synchronously receives a message a Topic
 * 
 * 
 * 
 * @author Scott.Stark@jboss.org
 * 
 * @version $Revision:$
 * 
 */
public class DurableTopicRecvClient
...{
    TopicConnection conn = null;
    TopicSession session = null;
    Topic topic = null;
    public void setupPubSub()
    throws JMSException, NamingException
    ...{
        Properties environment = new Properties();
        environment.put(Context.PROVIDER_URL, "localhost:1099");
        environment.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
        InitialContext iniCtx = new InitialContext(environment);
        Object tmp = iniCtx.lookup("ConnectionFactory");
        TopicConnectionFactory tcf = (TopicConnectionFactory) tmp;
        conn = tcf.createTopicConnection("john", "needle");
        topic = (Topic) iniCtx.lookup("topic/testTopic");
        session = conn.createTopicSession(false,
        TopicSession.AUTO_ACKNOWLEDGE);
        conn.start();
    }
    public void recvSync()
    throws JMSException, NamingException
    ...{
        System.out.println("Begin recvSync");
        // Setup the pub/sub connection, session
        setupPubSub();
        // Wait upto 5 seconds for the message
        TopicSubscriber recv = session.createDurableSubscriber(topic,
                "chap6-ex1dtps");
        Message msg = recv.receive(5000);
        if (msg == null)
            System.out.println("Timed out waiting for msg");
        else
            System.out.println("DurableTopicRecvClient.recv, msgt=" + msg);
    }
    public void stop() throws JMSException
    ...{
        conn.stop();
        session.close();
        conn.close();
    }
    public static void main(String args[]) throws Exception
    ...{
        System.out.println("Begin DurableTopicRecvClient, now="
                + System.currentTimeMillis());
        DurableTopicRecvClient client = new DurableTopicRecvClient();
        client.recvSync();
        client.stop();
        System.out.println("End DurableTopicRecvClient");
        System.exit(0);
    }
}　

　　这时候就可以先运行TopicSendClient了，然后再运行DurableTopicRecvClient,也可以收到消息．

     DurableTopicRecvClient.java中有两句代码需要引起注意:

     conn = tcf.createTopicConnection("john", "needle");
     TopicSubscriber recv = session.createDurableSubscriber(topic,"chap6-ex1dtps");