20090601

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tomcat 整合 activemq

在context.xml中添加如下JNDI配置，可以在全局的context.xml加，也可以在具体的某个webapp项目中的context.xml中加：

physicalName就是JMS应用中用到的destination的名字

将ActiveMQ lib目录下的5个jar包复制到Tomcat lib目录下：
activemq-core-5.1.0.jar
activemq-web-5.1.0.jar
geronimo-j2ee-management_1.0_spec-1.0.jar
geronimo-jms_1.1_spec-1.1.1.jar
geronimo-jta_1.0.1B_spec-1.0.1.jar

还要加上common-log包。

Listener端（JMSListener.java）完整实现：
package com.flvcd.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.*;
import javax.jms.*;

public class JMSListener extends HttpServlet implements MessageListener {
public void init(ServletConfig config) throws ServletException {
  try {
   InitialContext initCtx = new InitialContext();
   Context envContext = (Context) initCtx.lookup("java:comp/env");
   ConnectionFactory connectionFactory = (ConnectionFactory) envContext.lookup("jms/FailoverConnectionFactory");
   Connection connection = connectionFactory.createConnection();
   connection.setClientID("StevenClient");
   Session jmsSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
   TopicSubscriber consumer = jmsSession.createDurableSubscriber((Topic) envContext.lookup("jms/topic/MyTopic"), "MySub");
   consumer.setMessageListener(this);
   connection.start();
  } catch (NamingException e) {
   e.printStackTrace();
  } catch (JMSException e) {
   e.printStackTrace();
  }
}

public void onMessage(Message message) {
  if (checkText(message, "RefreshArticleId") != null) {
   String articleId = checkText(message, "RefreshArticleId");
   System.out.println("接收刷新文章消息，开始刷新文章ID=" + articleId);
  } else if (checkText(message, "RefreshThreadId") != null) {
   String threadId = checkText(message, "RefreshThreadId");
   System.out.println("接收刷新论坛帖子消息，开始刷新帖子ID=" + threadId);
  } else {
   System.out.println("接收普通消息，不做任何处理！");
  }
}

private static String checkText(Message m, String s) {
  try {
   return m.getStringProperty(s);
  } catch (JMSException e) {
   e.printStackTrace(System.out);
   return null;
  }
}

}

发送端的实现：

try {
  InitialContext initCtx = new InitialContext();
  Context envContext = (Context) initCtx.lookup("java:comp/env");
  ConnectionFactory connectionFactory = (ConnectionFactory) envContext.lookup("jms/NormalConnectionFactory");
  Connection connection = connectionFactory.createConnection();
  Session jmsSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  MessageProducer producer = jmsSession.createProducer((Destination) envContext.lookup("jms/topic/MyTopic"));

  //设置持久方式
  producer.setDeliveryMode(DeliveryMode.PERSISTENT);

  //建立新消息
  //Message testMessage = jmsSession.createMessage();
  ObjectMessage message = jmsSession.createObjectMessage("我在这里");

  producer.send(message);

  //发布刷新文章消息
  //testMessage.setStringProperty("RefreshArticleId", "9527");
  //producer.send(testMessage);
  //发布刷新帖子消息
  //testMessage.clearProperties();
  //testMessage.setStringProperty("RefreshThreadId", "999");
  //producer.send(testMessage);
} catch (NamingException e) {
  e.printStackTrace();
} catch (JMSException e) {
  e.printStackTrace();
}

flex中messaging-config.xml的配置：

<?xml version="1.0" encoding="UTF-8"?>
<service id="message-service"
class="flex.messaging.services.MessageService">

    <default-channels>
        <channel ref="my-polling-amf"/>
    </default-channels>

<destination id="chat">
  <properties>
   <server>
    <durable>true</durable>
   </server>

         <jms>
    <destination-type>topic</destination-type>
    <message-type>javax.jms.ObjectMessage</message-type>
    <connection-factory>java:comp/env/jms/FailoverConnectionFactory</connection-factory>
    <destination-jndi-name>java:comp/env/jms/topic/MyTopic</destination-jndi-name>
    <delivery-mode>PERSISTENT</delivery-mode>
    <message-priority>DEFAULT_PRIORITY</message-priority>
    <acknowledge-mode>AUTO_ACKNOWLEDGE</acknowledge-mode>
    <transacted-sessions>false</transacted-sessions>
   </jms>
       </properties>