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：

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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：

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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]

.......