使用activeMQ实现jms
(2010-07-14 22:56:00)
一:jms介绍
jms说白了就是java message service,是J2EE规范的一部分,跟jdbc差不多,sun只提供了接口,由各个厂商(provider)来进行具体的实现,然后使用者使用他们的jar包进行开发使用即可。
另外在jms的API中,jms传递消息有两种方式,一种是点对点的Queue,还有一个是发布订阅的Topic方式。区别在于:
对于Queue模式,一个发布者发布消息,下面的接收者按队列顺序接收,比如发布了10个消息,两个接收者A,B那就是A,B总共会收到10条消息,不重复。
对于Topic模式,一个发布者发布消息,有两个接收者A,B来订阅,那么发布了10条消息,A,B各收到10条消息。
关于api的简单基础可以看下:http://www.javaeye.com/topic/64707,简单的参考!
二:ActiveMQ介绍
activeMQ是apache下的一个开源jms产品,具体参见 apache官方网站;
Apache ActiveMQ is fast, supports many Cross Language Clients and Protocols , comes with easy to use Enterprise Integration Patterns and many advanced features while
fully supporting JMS 1.1 and J2EE 1.4. Apache ActiveMQ is released under the Apache 2.0 License
三:开始实现代码
1:使用activeMQ来完成jms的发送,必须要下载activeMQ,然后再本机安装,并且启动activeMQ的服务才行。在官网下载完成之后,运行bin目录下面的activemq.bat,将activeMQ成功启动。
启动成功之后可以运行:http://localhost:8161/admin/index.jsp 查看一下。
2:发送端,sender
- import javax.jms.Connection;
- import javax.jms.ConnectionFactory;
- import javax.jms.DeliveryMode;
- import javax.jms.Destination;
- import javax.jms.MessageProducer;
- import javax.jms.Session;
- import javax.jms.TextMessage;
- import org.apache.activemq.ActiveMQConnection;
- import org.apache.activemq.ActiveMQConnectionFactory;
- public class Sender {
- private static final int SEND_NUMBER = 5;
- public static void main(String[] args) {
- // ConnectionFactory :连接工厂,JMS 用它创建连接
- ConnectionFactory connectionFactory;
- // Connection :JMS 客户端到JMS Provider 的连接
- Connection connection = null;
- // Session: 一个发送或接收消息的线程
- Session session;
- // Destination :消息的目的地;消息发送给谁.
- Destination destination;
- // MessageProducer:消息发送者
- MessageProducer producer;
- // TextMessage message;
- // 构造ConnectionFactory实例对象,此处采用ActiveMq的实现jar
- connectionFactory = new ActiveMQConnectionFactory(
- ActiveMQConnection.DEFAULT_USER,
- ActiveMQConnection.DEFAULT_PASSWORD,
- "tcp://localhost:61616");
- try {
- // 构造从工厂得到连接对象
- connection = connectionFactory.createConnection();
- // 启动
- connection.start();
- // 获取操作连接
- session = connection.createSession(Boolean.TRUE,
- Session.AUTO_ACKNOWLEDGE);
- // 获取session注意参数值xingbo.xu-queue是一个服务器的queue,须在在ActiveMq的console配置
- destination = session.createQueue("test-queue");
- // 得到消息生成者【发送者】
- producer = session.createProducer(destination);
- // 设置不持久化,可以更改
- producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
- // 构造消息
- sendMessage(session, producer);
- session.commit();
- } catch (Exception e) {
- e.printStackTrace();
- } finally {
- try {
- if (null != connection)
- connection.close();
- } catch (Throwable ignore) {
- }
- }
- }
- public static void sendMessage(Session session, MessageProducer producer)
- throws Exception {
- for (int i = 1; i <=SEND_NUMBER; i++) {
- TextMessage message = session
- .createTextMessage("ActiveMq 发送的消息" + i);
- // 发送消息到目的地方
- System.out.println("发送消息:" + i);
- producer.send(message);
- }
- }
- }
- 3:接收端,receive
- 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.Session;
- import javax.jms.TextMessage;
- import org.apache.activemq.ActiveMQConnection;
- import org.apache.activemq.ActiveMQConnectionFactory;
- public class Receiver {
- public static void main(String[] args) {
- // ConnectionFactory :连接工厂,JMS 用它创建连接
- ConnectionFactory connectionFactory;
- // Connection :JMS 客户端到JMS Provider 的连接
- Connection connection = null;
- // Session: 一个发送或接收消息的线程
- Session session;
- // Destination :消息的目的地;消息发送给谁.
- Destination destination;
- // 消费者,消息接收者
- MessageConsumer consumer;
- connectionFactory = new ActiveMQConnectionFactory(
- ActiveMQConnection.DEFAULT_USER,
- ActiveMQConnection.DEFAULT_PASSWORD, "tcp://localhost:61616");
- try {
- // 构造从工厂得到连接对象
- connection = connectionFactory.createConnection();
- // 启动
- connection.start();
- // 获取操作连接
- session = connection.createSession(Boolean.FALSE,
- Session.AUTO_ACKNOWLEDGE);
- //test-queue跟sender的保持一致,一个创建一个来接收
- destination = session.createQueue("test-queue");
- consumer = session.createConsumer(destination);
- consumer.setMessageListener(new MessageListener() {
- public void onMessage(Message arg0) {
- System.out.println("==================");
- try {
- System.out.println("RECEIVE1第一个获得者:"
- + ((TextMessage) arg0).getText());
- } catch (JMSException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- });
- MessageConsumer consumer1 = session.createConsumer(destination);
- consumer1.setMessageListener(new MessageListener() {
- public void onMessage(Message arg0) {
- System.out.println("+++++++++++++++++++");
- try {
- System.out.println("RECEIVE1第二个获得者:"
- + ((TextMessage) arg0).getText());
- } catch (JMSException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- });
- } catch (Exception e) {
- e.printStackTrace();
- }
- //在eclipse里运行的时候,这里不要关闭,这样就可以一直等待服务器发送了,不然就直接结束了。
- // } finally {
- // try {
- // if (null != connection)
- // connection.close();
- // } catch (Throwable ignore) {
- // }
- // }
- }
- }
- 4:发送端,sender 上面的是用Queue的方式来创建,下面再用topic的方式实现同样的功能。
- import javax.jms.Connection;
- import javax.jms.JMSException;
- import javax.jms.Message;
- import javax.jms.MessageConsumer;
- import javax.jms.MessageListener;
- import javax.jms.MessageProducer;
- import javax.jms.Session;
- import javax.jms.TextMessage;
- import javax.jms.Topic;
- import org.apache.activemq.ActiveMQConnectionFactory;
- import org.apache.activemq.command.ActiveMQTopic;
- public class TopicTest {
- public static void main(String[] args) throws Exception {
- ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(
- "tcp://localhost:61616");
- Connection connection = factory.createConnection();
- connection.start();
- // 创建一个Topic
- Topic topic = new ActiveMQTopic("testTopic");
- Session session = connection.createSession(false,
- Session.AUTO_ACKNOWLEDGE);
- // 注册消费者1
- MessageConsumer comsumer1 = session.createConsumer(topic);
- comsumer1.setMessageListener(new MessageListener() {
- public void onMessage(Message m) {
- try {
- System.out.println("Consumer1 get "
- + ((TextMessage) m).getText());
- } catch (JMSException e) {
- e.printStackTrace();
- }
- }
- });
- // 注册消费者2
- MessageConsumer comsumer2 = session.createConsumer(topic);
- comsumer2.setMessageListener(new MessageListener() {
- public void onMessage(Message m) {
- try {
- System.out.println("Consumer2 get "
- + ((TextMessage) m).getText());
- } catch (JMSException e) {
- e.printStackTrace();
- }
- }
- });
- // 创建一个生产者,然后发送多个消息。
- MessageProducer producer = session.createProducer(topic);
- for (int i = 0; i < 10; i++) {
- System.out.println("producer begin produce=======");
- producer.send(session.createTextMessage("Message:" + i));
- }
- }
- }