【ActiveMQ】整合Spring详解

整个演示消息中间件ActiveMQ整合Spring的Maven项目结构为



1.项目的Pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.apache</groupId>
<artifactId>apache-activemq</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<!-- 集中定义依赖版本号 -->
<properties>
<spring.version>4.1.3.RELEASE</spring.version>
</properties>

<dependencies>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-all</artifactId>
<version>5.15.3</version>
</dependency>

<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>

10944
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>

</project>

2.配置生产者applicationContext-procuder.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jms="http://www.springframework.org/schema/jms" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> 
<!-- 1.配置ConnectionFactory -->

<!-- 真正可以产生Connection的ConnectionFactory，由对应的JMS服务厂商提供 -->
<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
<bean id="connectionFactory"
class="org.springframework.jms.connection.SingleConnectionFactory">
<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
<property name="targetConnectionFactory" ref="targetConnectionFactory" />
</bean>

<!-- 2.配置生产者 -->

<!-- Spring提供的JMS工具类，它可以进行消息发送、接收等 -->
<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
<!-- 这个connectionFactory对应的是我们定义的Spring提供的那个ConnectionFactory对象 -->
<property name="connectionFactory" ref="connectionFactory" />
</bean>
<!--这个是队列目的地，点对点的 -->
<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
<constructor-arg>
<value>queue</value>
</constructor-arg>
</bean>
<!--这个是主题目的地，一对多的 -->
<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
<constructor-arg value="topic" />
</bean>

</beans>

发送消息

/**
* 生产者-点对点模式
*/
public class Producer {

public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext-procuder.xml");
//获得JmsTemplate对象
JmsTemplate template = (JmsTemplate) context.getBean("jmsTemplate");
//获得Destination
ActiveMQQueue queue = (ActiveMQQueue) context.getBean("queueDestination");
//发送消息
template.send(queue, new MessageCreator(){

@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage("hello");
}

});
}

}

3.配置消费者

那么消费者是通过Spring为我们封装的消息监听容器MessageListenerContainer实现的，它负责接收信息，并把接收到的信息分发给真正的MessageListener进行处理。每个消费者对应每个目的地都需要有对应的MessageListenerContainer。

对于消息监听容器而言，除了要知道监听哪个目的地之外，还需要知道到哪里去监听，也就是说它还需要知道去监听哪个JMS服务器，这是通过在配置MessageConnectionFactory的时候往里面注入一个ConnectionFactory来实现的。

所以在配置一个MessageListenerContainer的时候有三个属性必须指定：

1、一个是表示从哪里监听的ConnectionFactory

2、一个是表示监听什么的Destination；

3、一个是接收到消息以后进行消息处理的MessageListener。

常用的MessageListenerContainer实现类是DefaultMessageListenerContainer。

配置applicationContext-consumer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jms="http://www.springframework.org/schema/jms" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> 
<!-- 1.配置ConnectionFactory -->

<!-- 真正可以产生Connection的ConnectionFactory，由对应的JMS服务厂商提供 -->
<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="tcp://localhost:61616" />
</bean>
<bean id="connectionFactory"
class="org.springframework.jms.connection.SingleConnectionFactory">
<property name="targetConnectionFactory" ref="targetConnectionFactory" />
</bean>

<!-- 2.配置消费者 -->

<!--这个是队列目的地，点对点的 -->
<bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue">
<constructor-arg>
<value>queue</value>
</constructor-arg>
</bean>
<!--这个是主题目的地，一对多的 -->
<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
<constructor-arg value="topic" />
</bean>

<!-- 消息监听容器 -->
<bean id="jmsContainer"
class="org.springframework.jms.listener.DefaultMessageListenerContainer">
<property name="connectionFactory" ref="connectionFactory" />
<property name="destination" ref="queueDestination" />
<property name="messageListener" ref="myMessageListener" />
</bean>

<!-- 配置监听器 -->
<bean id="myMessageListener" class="com.activemq.spring.MyMessageListener" />
</beans>

实现MessageListener接口

/**
* 消息监听容器
*/
public class MyMessageListener implements MessageListener{

@Override
public void onMessage(Message message) {
System.out.println("消息开始接收...");
if(message instanceof TextMessage){
String msg = "";
try {
msg = ((TextMessage) message).getText();
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(msg);
}
}

}

接收消息

/**
* 消费者
*/
public class Consumer {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext-consumer.xml");
try {
System.in.read();
} catch (Exception e) {
e.printStackTrace();
}
}
}

运行生产者Producer，结果为



运行消费者Consumer，结果为





接下来配置发布/订阅（pub/sub）模式，其中pom.xml、applicationContext-procuder.xml、实现MessageListener接口和点对点模式一样。

配置applicationContext-consumer.xml

......

<!-- 消息监听容器 -->
<bean id="jmsContainer"
class="org.springframework.jms.listener.DefaultMessageListenerContainer">
<property name="connectionFactory" ref="connectionFactory" />
<property name="destination" ref="topicDestination" />
<property name="messageListener" ref="myMessageListener" />
</bean>

.....

其它部分和点对点模式一样

配置生产者Procuder2

/**
* 生产者-发布/订阅模式
*/
public class Producer2 {

public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext-procuder.xml");
//获得JmsTemplate对象
JmsTemplate template = (JmsTemplate) context.getBean("jmsTemplate");
//获得Destination
ActiveMQTopic topic = (ActiveMQTopic) context.getBean("topicDestination");
//发送消息
template.send(topic, new MessageCreator(){

@Override
public Message createMessage(Session session) throws JMSException {
return session.createTextMessage("hello topic");
}

});
}

}

配置消费者Consumer2

/**
* 消费者
*/
public class Consumer2 {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext-consumer.xml");
try {
System.in.read();
} catch (Exception e) {
e.printStackTrace();
}
}
}

运行生产者Procuder2



运行消费者Consumer2