Apache ActiveMQ消息中间件的基本使用
Apache ActiveMQ是Apache软件基金会所研发的开放源码消息中间件;由于ActiveMQ是一个纯Java程式,因此只需要操作系统支援Java虚拟机,ActiveMQ便可执行。
支持Java消息服务 (JMS) 1.1 版本
Spring Framework
集群 (Clustering)
支持的编程语言包括:C、C++、C#、Delphi、Erlang、Adobe Flash、Haskell、Java、JavaScript、Perl、PHP、Pike、Python和Ruby [1]
协议支持包括:OpenWire、REST、STOMP、WS-Notification、XMPP以及AMQP
好,我们先写个demo来试试 ActiveMQ的效果.
首先我们要下载ActiveMQ,下载地址:
http://www.apache.org/dyn/closer.cgi?path=/activemq/apache-activemq/5.8.0/apache-activemq-5.8.0-bin.zip
解压后,在x:/apache-activemq-5.8.0-bin/bin 目录下执行 activemq.bat即可启动 ActiveMQ,
由于ActiveMQ内置了Jetty web服务器,当ActiveMQ启动成功后,可以通过:http://localhost:8161/admin/访问ActiveMQ的控制台,默认的用户名和密码是:admin。
至此ActiveMQ 服务已经启动了,接下来我们先将x:/apache-activemq-5.8.0-bin/activemq-all-5.8.0.jar拷贝到你的classpath目录下,利用Java写个demo来尝试一下这个消息中间件。
JmsSender:
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://127.0.0.1:61616"); Connection connection = connectionFactory.createConnection(); connection.start(); Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); Destination destination = session.createQueue("Test.foo"); MessageProducer producer = session.createProducer(destination); producer.setDeliveryMode(DeliveryMode.PERSISTENT); for(int i=0; i<100; i++) { int id = i+1; ObjectMessage message = session.createObjectMessage(); message.setObject(new User(id, "张三"+id, "123456")); producer.send(message); } session.commit(); session.close(); connection.close();JmsReceiver:
ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://127.0.0.1:61616"); Connection connection = connectionFactory.createConnection(); connection.start(); final Session session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); Destination destination = session.createQueue("Test.foo"); MessageConsumer consumer = session.createConsumer(destination); //listener 方式 consumer.setMessageListener(new MessageListener() { public void onMessage(Message msg) { ObjectMessage message = (ObjectMessage) msg; //TODO something.... try { User user = (User) message.getObject(); System.out.println("收到消息:"+user); } catch (JMSException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } try { session.commit(); } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); TimeUnit.MINUTES.sleep(1); session.close(); connection.close();运行后,得到如下消息:
log4j:WARN No appenders could be found for logger (org.apache.activemq.transport.WireFormatNegotiator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
收到消息:User [id=1, username=张三1, password=123456, now=Fri Jun 28 12:04:32 CST 2013]
收到消息:User [id=2, username=张三2, password=123456, now=Fri Jun 28 12:04:33 CST 2013]
.......