JMS 之 Active MQ 的spring整合
一、与spring整合实现ptp的同步接收消息
pom.xml:
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jms --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>4.3.7.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.activemq/activemq-pool --> <dependency> <groupId>org.apache.activemq</groupId> <artifactId>activemq-pool</artifactId> <version>5.9.0</version> </dependency>
spring-jms.xml:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中负责创建到ActiveMQ连接的工厂类 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 创建连接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring为我们提供了多个ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- 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="cachingConnectionFactory"/> </bean> <!--这个是队列目的地,点对点的--> <bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue"> <constructor-arg index="0" value="spring-queue"/> </bean> </beans>
ConnectionFactory是用于产生到JMS服务器的链接的,Spring为我们提供了多个ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory。SingleConnectionFactory对于建立JMS服务器链接的请求会一直返回同一个链接,并且会忽略Connection的close方法调用。CachingConnectionFactory继承了SingleConnectionFactory,所以它拥有SingleConnectionFactory的所有功能,同时它还新增了缓存功能,它可以缓存Session、MessageProducer和MessageConsumer。这里我们使用CachingConnectionFactory来作为示例。
消息生产者:
package com.jalja.org.jms.spring; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.Session; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; import org.springframework.jms.core.MessageCreator; public class SpringJmsSend { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); jmsTemplate.send(queueDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS"); } }); } }
消费者:
package com.jalja.org.jms.spring; import javax.jms.Destination; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; public class SpringJmsReceive { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); String msg=(String) jmsTemplate.receiveAndConvert(queueDestination); System.out.println(msg); } }
二、PTP的异步调用
我们在spring中直接配置异步接收消息的监听器,这样就相当于在spring中配置了消费者,在接受消息的时候就不必要启动消费者了。
spring-jms.xml:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中负责创建到ActiveMQ连接的工厂类 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 创建连接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring为我们提供了多个ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- 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="cachingConnectionFactory"/> </bean> <!--这个是队列目的地,点对点的--> <bean id="queueDestination" class="org.apache.activemq.command.ActiveMQQueue"> <constructor-arg index="0" value="spring-queue"/> </bean> <!-- 消息监听器 --> <bean id="myMessageListener" class="com.jalja.org.jms.spring.yb.MyMessageListener"/> <!-- 消息监听容器 --> <bean id="jmsContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="cachingConnectionFactory" /> <property name="destination" ref="queueDestination" /> <property name="messageListener" ref="myMessageListener" /> </bean> </beans>
生产者往指定目的地Destination发送消息后,接下来就是消费者对指定目的地的消息进行消费了。那么消费者是如何知道有生产者发送消息到指定目的地Destination了呢?这是通过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。所以我们在配置一个MessageListenerContainer的时候有三个属性必须指定,一个是表示从哪里监听的ConnectionFactory;一个是表示监听什么的Destination;一个是接收到消息以后进行消息处理的MessageListener。Spring一共为我们提供了两种类型的MessageListenerContainer,SimpleMessageListenerContainer和DefaultMessageListenerContainer。
SimpleMessageListenerContainer:SimpleMessageListenerContainer会在一开始的时候就创建一个会话session和消费者Consumer,并且会使用标准的JMS MessageConsumer.setMessageListener()方法注册监听器让JMS提供者调用监听器的回调函数。它不会动态的适应运行时需要和参与外部的事务管理。兼容性方面,它非常接近于独立的JMS规范,但一般不兼容Java EE的JMS限制。
DefaultMessageListenerContainer:在大多数情况下我们还是使用的DefaultMessageListenerContainer,跟SimpleMessageListenerContainer相比,DefaultMessageListenerContainer会动态的适应运行时需要,并且能够参与外部的事务管理。它很好的平衡了对JMS提供者要求低、先进功能如事务参与和兼容Java EE环境。
消息生产者:
public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination queueDestination=(Destination) context.getBean("queueDestination"); System.out.println("异步调用执行开始"); jmsTemplate.send(queueDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS"); } }); System.out.println("异步调用执行结束"); }
消息监听器:MyMessageListener
public class MyMessageListener implements MessageListener{ @Override public void onMessage(Message message) { TextMessage msg= (TextMessage) message; try { System.out.println("你好:"+msg.getText()); } catch (JMSException e) { e.printStackTrace(); } } }
启动消息生产者 监听器的执行结果是:
异步调用执行开始
异步调用执行结束
你好:Hello spring JMS
三、发布订阅 同步接收
spring-jms.xml:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jms="http://www.springframework.org/schema/jms" xmlns:amq="http://activemq.apache.org/schema/core" xsi:schemaLocation="http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd http://www.springframework.org/schema/jms http://www.springframework.org/schema/jms/spring-jms.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- ActiveMQConnectionFactory就是JMS中负责创建到ActiveMQ连接的工厂类 --> <bean id="connectionFactory" class="org.apache.activemq.spring.ActiveMQConnectionFactory" > <property name="brokerURL" value="tcp://192.168.0.224:61616"/> </bean> <!-- 创建连接池 --> <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory" ref="connectionFactory"/> <property name="maxConnections" value="10"/> </bean> <!-- Spring为我们提供了多个ConnectionFactory,有SingleConnectionFactory和CachingConnectionFactory --> <bean id="cachingConnectionFactory" class="org.springframework.jms.connection.CachingConnectionFactory"> <property name="targetConnectionFactory" ref="pooledConnectionFactory"/> </bean> <!-- 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="cachingConnectionFactory"/> </bean> <!--这个是队列目的地,发布订阅--> <bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic"> <constructor-arg index="0" value="spring-Topic"/> </bean> </beans>
生产者:
public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination topicDestination=(Destination) context.getBean("topicDestination"); jmsTemplate.send(topicDestination, new MessageCreator(){ @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage("Hello spring JMS topicDestination"); } }); }
消费者:
public class SpringJmsSubscriber { public static void main(String[] args) { ApplicationContext context=new ClassPathXmlApplicationContext("spring-jms.xml"); JmsTemplate jmsTemplate=(JmsTemplate) context.getBean("jmsTemplate"); Destination topicDestination=(Destination) context.getBean("topicDestination"); String msg=(String) jmsTemplate.receiveAndConvert(topicDestination); System.out.println(msg); } }