ActiveMQ学习笔记(二) JMS与Spring

上文可见，JMS Native API使用起来不是特别方便。好在Spring提供了很好的JMS支持。

(一)配置ConnectionFactory
如果使用连接池的话，不要忘记activemq-pool-5.6.0.jar

<bean id="connectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop">
	<property name="connectionFactory" ref="innerConnectionFactory" />
</bean>

<bean id="innerConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
	<property name="brokerURL" value="tcp://localhost:61616" />
</bean>

(二)配置一个Destination作为默认投递目标

<bean id="defaultDestination" class="org.apache.activemq.command.ActiveMQQueue">
	<constructor-arg index="0" value="ztgame.amt.default.queue" />
</bean>

(三)核心JmsTemplate

<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
	<property name="connectionFactory" ref="connectionFactory" />
	<property name="defaultDestination" ref="defaultDestination" />
</bean>

(四)JMS事务

<bean id="jmsTransactionManager" class="org.springframework.jms.connection.JmsTransactionManager">
	<property name="connectionFactory" ref="connectionFactory" />
</bean>

<tx:annotation-driven transaction-manager="jmsTransactionManager" />

(五)编写消息驱动Bean,两个接口实现一个即可

• javax.jms.MessageListener
• org.springframework.jms.listener.SessionAwareMessageListener

package com.ztgame.amt.jms.mdp;

import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.springframework.jms.listener.SessionAwareMessageListener;
import org.springframework.stereotype.Component;

@Component("defaultMessageHandler")
public class DefaultMessageHandler implements SessionAwareMessageListener<TextMessage> {

	public void onMessage(TextMessage message, Session session)
			throws JMSException {
		
		String text = message.getText();
		
		if (text.length() == 0) {
			System.out.println("<empty>");
		} else {
			System.out.println(text);
		}
	}
}

(六)配置消息驱动Bean

<!-- Message Driven POJOs -->
<jms:listener-container connection-factory="connectionFactory">
	<jms:listener destination="ztgame.amt.default.queue" ref="defaultMessageHandler" />
</jms:listener-container>

(七)编写测试代码

package junit;

import java.util.UUID;

import javax.annotation.Resource;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;

import org.junit.Test;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;

@ContextConfiguration({ "classpath:spring-beans.xml", "classpath:spring-jms.xml" })
public class TestSomeService extends AbstractJUnit4SpringContextTests {

	@Resource
	private JmsTemplate jmsTempalte;
	
	@Test
	public void test() {
		jmsTempalte.send(new MessageCreator() {
			public Message createMessage(Session session) throws JMSException {
				return session.createTextMessage(UUID.randomUUID().toString());
			}
		});
	}
}