Spring+ActiveMQ实现消息收发和订阅

1、去apach网站下载ActiveMQ，地址为http://activemq.apache.org/download.html；

      ActiveMQ类似tomcat可以独立启动，相当于开了消息服务，包括连接客户端管理、消息存储设置，对于复杂的系统还可以设置双机热备、负载均衡等；

     ActiveMQ有个管理界面，可以查看客户端连接情况，消息队列的发送和接收情况等，也可以直接新建消息；

    启动bin/activemq.bat即可启动ActiveMQ服务；

    conf/activemq.xml是配置文件，可以配置相关性能参数，消息存储形式和大小等；

2、MQ的spring配置

ActimveMQ的spring配置文件如下：

<bean id="connectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<!-- property name="brokerURL" value="tcp://127.0.0.1:61616" / -->
		<property name="brokerURL" value="failover://(tcp://127.0.0.1:61616)?initialReconnectDelay=100" /> 
		<property name="useAsyncSend" value="true" />
		<property name="maxThreadPoolSize" value="50" />
	</bean>
	
	<!-- <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory">
		<property name="connectionFactory" ref="connectionFactory" />
	</bean> -->
	
	<bean id="singleConnectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
		<property name="targetConnectionFactory"><ref local="connectionFactory" /></property>
	</bean>
	
	
	<bean id="destinationQueue" class="org.apache.activemq.command.ActiveMQQueue">  
		<!-- 设置消息队列的名字 -->
        <constructor-arg index="0" value="myqueue0"/>
   </bean>
   <!-- 发送消息的目的地（一个队列） -->
    <bean id="vehPassTopic" class="org.apache.activemq.command.ActiveMQTopic">
        <!-- 设置消息队列的名字 -->
        <constructor-arg index="0" value="vehPass.messages" />
    </bean>
    
    <bean id="vehAlarmTopic" class="org.apache.activemq.command.ActiveMQTopic">
        <!-- 设置消息队列的名字 -->
        <constructor-arg index="0" value="vehAlarm.messages" />
    </bean>
    
    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
		<!-- <property name="connectionFactory" ref="connectionFactory"/> -->
		<property name="connectionFactory" ref="singleConnectionFactory" />
		<!-- <property name="defaultDestination" ref="destination"/> -->
		<!-- 区别它采用的模式为false是p2p为true是订阅 -->
        <!-- <property name="pubSubDomain" value="true" /> -->
	</bean>

注意这行很关键

<property name="brokerURL" value="failover://(tcp://127.0.0.1:61616)?initialReconnectDelay=100" /> 

是为了保证断线自动重连；如果没有设置，程序与ActiveMQ服务连接后期间出现过网络异常，再程序无法与ActiveMQ正常通讯；

3、测试程序

发送消息程序：

public class MessageSender{
	
	protected Logger log = Logger.getLogger(MessageReceiver.class.getName());
	
	private static JmsTemplate jmsTemplate = (JmsTemplate)MyApplicationContextUtil.context.getBean("jmsTemplate");
	private static Destination vehAlarmTopic = (Destination)MyApplicationContextUtil.context.getBean("vehAlarmTopic");
	private static Destination vehPassTopic = (Destination)MyApplicationContextUtil.context.getBean("vehPassTopic");
	static MyMessageCreator mc = null;
	/* 
	 * 
	 */
	public static boolean sendLiveMessage(Object msg){
		boolean isSend = false;
		mc = new MyMessageCreator(msg);
		jmsTemplate.send(vehPassTopic, mc);
		isSend = true;
		
		return isSend;
	}
	
	public static boolean sendBKMessage(Object msg){
		boolean isSend = false;
		MyMessageCreator mc = new MyMessageCreator(msg);
		jmsTemplate.send(vehAlarmTopic, mc);
		isSend = true;
		
		return isSend;
	}
	
	public static void main(String args[]) throws Exception {
		ApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] { "applicationContext-mq.xml" });
        JmsTemplate jmsTemplate = (JmsTemplate) context.getBean("jmsTemplate");
        Destination destinationTopic = (Destination) context.getBean("destinationTopic");
        for (int i = 1; i < 10; i++) {
            MyMessageCreator mc = new MyMessageCreator("test");//生成消息
            jmsTemplate.send(destinationTopic, mc);
            Thread.sleep(1000);//1秒后发送下一条消息
        }

    }
}

接收消息程序：

public class MessageReceiver {
	
	protected Logger log = Logger.getLogger(MessageReceiver.class.getName());
	
	private static JmsTemplate jmsTemplate = (JmsTemplate)MyApplicationContextUtil.context.getBean("jmsTemplate");
	private static Destination vehPassTopic = (Destination)MyApplicationContextUtil.context.getBean("vehPassTopic");
	
	/**
	 * 
	 * @return
	 */
	public static List<Message> receiveMessage(){
		List<Message> msgList = null;
		Message message = null;
        
        for (int i = 0; i < 100;) {//每次接收100条记录
    		message = jmsTemplate.receive(vehPassTopic);
    		if(message != null){
    			msgList.add(message);
    			/*if (message instanceof TextMessage) {
    				 i++;
    				 msg = (TextMessage)message;
    				 returnMsg =  msg.getText();
    		         log.debug("收到消息 :" + msg.getText());
    			}*/
    		}else{
    			break;
    		}
        }
		return msgList;
	}
	
	
	public static void main(String args[]) throws Exception {
		ApplicationContext context = new ClassPathXmlApplicationContext(
                new String[] { "applicationContext-mq.xml" });
        JmsTemplate jmsTemplate = (JmsTemplate) context.getBean("jmsTemplate");
        Destination destinationTopic = (Destination) context.getBean("destinationTopic");
        TextMessage msg = null;
        for (int i = 0; i < 10; i ++) {
            msg = (TextMessage) jmsTemplate.receive(destinationTopic);
            System.out.println("收到消息 :" + msg.getText());
            Thread.sleep(1000);
        }
    }
	
}

消息具体发送和接收情况都可在ActiveMQ的管理界面查看。

管理界面如下：访问地址：http://127.0.0.1:8161/admin/