tomcat监听activemq jms配置

当从webservice接收到信息的时候，消息生产者producer立刻把收到的消息放入到jms里面，消费者cusomer这时要设置一个监听，当生产者发送消息时，只要消息被发出来，消费者就会接收到消息，然后进行相应的操作。

在tomcat里面，要进行配置。

首先在tomcat安装目录里面，对conf/context.xml进行配置，加入以下代码：

<Resource

name="jms/FailoverConnectionFactory"

auth="Container"

type="org.apache.activemq.ActiveMQConnectionFactory"

description="JMS Connection Factory"

factory="org.apache.activemq.jndi.JNDIReferenceFactory"

brokerURL="failover:(tcp://localhost:61616)?initialReconnectDelay=100&maxReconnectAttempts=5"

brokerName="localhost"

useEmbeddedBroker="false"/>

<Resource

name="jms/NormalConnectionFactory"

auth="Container"

type="org.apache.activemq.ActiveMQConnectionFactory"

description="JMS Connection Factory"

factory="org.apache.activemq.jndi.JNDIReferenceFactory"

brokerURL="tcp://localhost:61616"

brokerName="localhost"

useEmbeddedBroker="false"/>

<Resource name="jms/topic/MyTopic"

auth="Container"

type="org.apache.activemq.command.ActiveMQTopic"

factory="org.apache.activemq.jndi.JNDIReferenceFactory"

physicalName="MY.TEST.FOO"/>

<Resource name="jms/queue/MyQueue"

auth="Container"

type="org.apache.activemq.command.ActiveMQQueue"

factory="org.apache.activemq.jndi.JNDIReferenceFactory"

physicalName="MY.TEST.FOO.QUEUE"/>

具体也不晓得这个是做什么的，看上去貌似是配置jndi的，我没用jndi的方式，加上这个，也正常运行。所以还是加上吧。

然后在web.xml里面，加入监听的类，这个类是自己写的。

<!-- 添加jms监听 -->
<servlet>
<servlet-name>jms-listener</servlet-name>
<servlet-class>
com.message.JMSListener
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

然后就建立这个类：

package com.message;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import javax.servlet.http.HttpServlet;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.log4j.Logger;public class JMSListener extends HttpServlet implements MessageListener {
/**
*
*/
private static final long serialVersionUID = -8455543162505698971L;
private Logger logger=Logger.getLogger(JMSListener.class);

ConnectionFactory connectionFactory;
Connection connection=null;
Session session;
Destination destination;
MessageConsumer consumer;
int i;

public JMSListener(){
String url = "tcp://localhost:61616";
String queue ="NewNocPacket";
connectionFactory = new ActiveMQConnectionFactory(
ActiveMQConnection.DEFAULT_USER,
ActiveMQConnection.DEFAULT_PASSWORD, url);
try {
connection = connectionFactory.createConnection();
session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue(queue);
consumer = session.createConsumer(destination);
consumer.setMessageListener(this);
connection.start();
} catch (JMSException e) {
// TODO Auto-generated catch block
logger.error("===========cusumer create error");
e.printStackTrace();
}
}

@Override
public void onMessage(Message message) {
// TODO Auto-generated method stub
ObjectMessage msg=(ObjectMessage) message;try {
logger.info("=========hello ===========");
i++;
} catch (JMSException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

原理大概是这样，上面代码不要照抄的。

然后就ok了，部署一下项目，建立一个消息的发送者，消息到达后，监听就会自动执行，打印出onmessage里面的话。