spring 使用 ActiveMQ,JMS使用
MS 定义了两种方式:Quere(点对点);Topic(发布/订阅)。
ConnectionFactory 是连接工厂,负责创建Connection。
Connection 负责创建 Session。
Session 创建 MessageProducer(用来发消息) 和 MessageConsumer(用来接收消息)。
Destination 是消息的目的地。
下载 apache-activemq-5.3.0。http://activemq.apache.org/download.html,解压,
然后双击 bin/activemq.bat。运行后,可以在 http://localhost:8161/admin 观察。
也有 demo, http://localhost:8161/demo。把 activemq-all-5.3.0.jar 加入 classpath。
一 ActiveMQ的jms写法
1 消息发送类
public class JMSsenderBean { public static void main(String[] args) throws Exception { //连接工厂。连接工厂(ConnectionFactory)是由管理员创建,并绑定到JNDI树中。客户端使用JNDI查找连接工厂,然后利用连接工厂创建一个JMS连接。 ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); // JMS连接。JMS连接(Connection)表示JMS客户端和服务器端之间的一个活动的连接,是由客户端通过调用连接工厂的方法建立的 Connection connection = connectionFactory.createConnection(); //开启连接 connection.start(); Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); Destination destination = session.createQueue("my-queue"); MessageProducer producer = session.createProducer(destination); for(int i=0; i<3; i++) { MapMessage message = session.createMapMessage(); message.setLong("count", new Date().getTime()); Thread.sleep(1000); //通过消息生产者发出消息 producer.send(message); } session.commit(); session.close(); connection.close(); } }
2 消息接收类
import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.Destination; import javax.jms.MapMessage; import javax.jms.MessageConsumer; import javax.jms.Session; import org.apache.activemq.ActiveMQConnectionFactory; //消息接收类 public class JMSreceive { public static void main(String[] args) throws Exception { ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); Connection connection = connectionFactory.createConnection(); connection.start(); final Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); Destination destination = session.createQueue("my-queue"); MessageConsumer consumer = session.createConsumer(destination); /*//listener 方式 consumer.setMessageListener(new MessageListener() { public void onMessage(Message msg) { MapMessage message = (MapMessage) msg; //TODO something.... System.out.println("收到消息:" + new Date(message.getLong("count"))); session.commit(); } }); Thread.sleep(30000); */ int i=0; while(i<3) { i++; MapMessage message = (MapMessage) consumer.receive(); session.commit(); System.out.println("收到消息:" + new Date(message.getLong("count"))); } session.close(); connection.close(); } }
二 spring集成
1 spring 配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" 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-2.5.xsd"> <!-- 在非 web / ejb 容器中使用 pool 时,要手动 stop,spring 不会为你执行 destroy-method 的方法 <bean id="jmsFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop"> <property name="connectionFactory"> <bean class="org.apache.activemq.ActiveMQConnectionFactory"> <property name="brokerURL" value="tcp://localhost:61616" /> </bean> </property> </bean> --> <bean id="jmsFactory" class="org.apache.activemq.ActiveMQConnectionFactory"> <property name="brokerURL" value="tcp://localhost:61616" /> </bean> <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue"> <constructor-arg index="0" value="my-queue" /> </bean> <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate"> <property name="connectionFactory" ref="jmsFactory" /> <property name="defaultDestination" ref="destination" /> <property name="messageConverter"> <bean class="org.springframework.jms.support.converter.SimpleMessageConverter" /> </property> </bean> </beans>
2 消息发送类
import java.util.Date; import javax.jms.JMSException; import javax.jms.MapMessage; import javax.jms.Session; import javax.mail.Message; import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; import org.springframework.jms.core.MessageCreator; public class JMSsenderBean_Spring { public static void main(String[] args) { ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:spring/applicationContext-jmx.xml"); JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate"); jmsTemplate.send(new MessageCreator() { public MapMessage createMessage(Session session) throws JMSException { MapMessage mm = session.createMapMessage(); mm.setLong("count", new Date().getTime()); return mm; } }); } }
3 消息接收类
import java.util.Date; import java.util.Map; import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; import org.springframework.jms.core.JmsTemplate; public class JMSreceive_Spring { public static void main(String[] args) { ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:spring/applicationContext-jmx.xml"); JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate"); while(true) { Map<String, Object> mm = (Map<String, Object>) jmsTemplate.receiveAndConvert(); System.out.println("收到消息:" + new Date((Long)mm.get("count"))); } } }
来自: http://blog.chenlb.com/2010/01/activemq-hello.html
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