• apache ActiveMQ之初体验


    版权声明: https://blog.csdn.net/zdp072/article/details/27237549

    一. 开篇语

    继上一篇weblogic中使用jms发送和接受消息的文章后, 本文使用apache的一个开源组件ActiveMQ接着探讨JMS的话题, 本篇仅仅是ActiveMQ的一个入门的样例, 希望对您有所帮助.


    二. ActiveMQ

    1. ActiveMQ简单介绍:

    ActiveMQ是Apache的一个能力强劲的开源消息总线, 它全然支持JMS1.1和JavaEE1.4规范的JMS Provider实现.


    2. ActiveMQ特性:

    1.) 多种语言和协议编写client。语言: Java, C, C++, C#, Ruby, Perl, Python, PHP。

    应用协议: OpenWire,Stomp REST,WS Notification,XMPP,AMQP
    2.) 全然支持JMS1.1和J2EE 1.4规范 (持久化,XA消息,事务)
    3.) 对Spring的支持,ActiveMQ能够非常easy内嵌到使用Spring的系统里面去,并且也支持Spring2.0的特性
    4.) 通过了常见J2EE服务器(如 Geronimo,JBoss 4, GlassFish,WebLogic)的測试,当中通过JCA 1.5 resourceadaptors的配置,

         能够让ActiveMQ能够自己主动的部署到不论什么兼容J2EE1.4商业服务器上
    5.) 支持多种传送协议:in-VM,TCP,SSL,NIO,UDP,JGroups,JXTA
    6.) 支持通过JDBC和journal提供快速的消息持久化
    7.) 从设计上保证了高性能的集群,client-服务器,点对点
    8.) 支持Ajax
    9.) 支持与Axis的整合
    10.) 能够非常easy得调用内嵌JMS provider,进行測试


    3. 环境准备:

    1.) 下载ActiveMQ: 

         http://activemq.apache.org/download.html, 我下载的是apache-activemq-5.2.0

    2.) 执行ActiveMQ server

         解压缩下载好的文件, 双击bin/activemq.bat 启动server, ActiveMQ内置了jetty服务器, 默认使用TCP连接port为61616.

         ActiveMQ提供一个用于监控ActiveMQ的admin应用: http://127.0.0.1:8161/admin

    3.) 在Eclipse中建立Javaproject, 并导入activemq-all-5.2.0.jar包

    4.) 新建两个Java类: 消息生产者MsgSender和消息消费者MsgReceiver


    4. 代码測试(P2P):

    1.) 消息生产者: MsgSender

    /**
     * Message Provider
     */
    public class MsgSender {
    	
    	// ConnectionFactory: use to create JMS connection
    	private static ConnectionFactory connectionFactory;
    
    	// Connection: connect message provider and JMS server
    	private static Connection connection;
    
    	// Session: a message send or receive thread
    	private static Session session;
    
    	// Destination: use to sign the message type
    	private static Destination destination;
    
    	// MessageProducer:sender
    	private static MessageProducer messageProducer;
    
    	/**
    	 * init the JMS object
    	 */
    	public static void init() throws Exception {
    		// use ActiveMQ to to create connection factory.
    		connectionFactory = new ActiveMQConnectionFactory(
    				ActiveMQConnection.DEFAULT_USER, 
    				ActiveMQConnection.DEFAULT_PASSWORD, 
    				"tcp://localhost:61616");
    
    		// get the connection from connection factory
    		connection = connectionFactory.createConnection();
    		session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
    		destination = session.createQueue("myQueue");
    		messageProducer = session.createProducer(destination);
    		messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
    
    		connection.start();
    	}
    
    	/**
    	 * send activeMq message
    	 */
    	public static void sendMessage() throws Exception {
    		for (int i = 1; i <= 5; i++) {
    			TextMessage message = session.createTextMessage("ActiveMq message " + i);
    			System.out.println("send:" + "ActiveMq message " + i);
    			messageProducer.send(message);
    		}
    		session.commit();
    	}
    	
    	/**
    	 * release resource
    	 */
    	public static void release() throws Exception {
    		messageProducer.close();
    		session.close();
    		connection.close();
    	}
    
    	/**
    	 * main method
    	 */
    	public static void main(String[] args) throws Exception {
    		init();
    		sendMessage();
    		release();
    	}
    }

    2.) 消息消费者: MsgReceiver

    /**
     * Message Consumer
     */
    public class MsgReceiver {
    	// ConnectionFactory: use to create JMS connection
    	private static ConnectionFactory connectionFactory;
    
    	// Connection: connect message provider and JMS server
    	private static Connection connection;
    
    	// Session: a message send or receive thread
    	private static Session session;
    
    	// use to sign the message type
    	private static Destination destination;
    
    	// MessageConsumer: receiver
    	private static MessageConsumer messageConsumer;
    
    	/**
    	 * init the JMS object
    	 */
    	public static void init() throws Exception {
    		// use ActiveMQ to to create connection factory.
    		connectionFactory = new ActiveMQConnectionFactory(
    				ActiveMQConnection.DEFAULT_USER, 
    				ActiveMQConnection.DEFAULT_PASSWORD, 
    				"tcp://localhost:61616");
    
    		// get the connection from connection factory
    		connection = connectionFactory.createConnection();
    		session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
    		destination = session.createQueue("myQueue");
    		messageConsumer = session.createConsumer(destination);
    		
    		connection.start();
    	}
    
    	/**
    	 * receive activeMq message
    	 */
    	public static void receiveMessage() throws Exception {
    		while (true) {
    			TextMessage message = (TextMessage) messageConsumer.receive();
    			if (message != null) {
    				System.out.println("receive: " + message.getText());
    			} else {
    				break;
    			}
    		}
    	}
    
    	/**
    	 * release resource
    	 */
    	public static void release() throws Exception {
    		messageConsumer.close();
    		session.close();
    		connection.close();
    	}
    	
    	/**
    	 * main method
    	 */
    	public static void main(String[] args) throws Exception {
    		init();
    		receiveMessage();
    		release();
    	}
    }

    3.) 源代码下载地址: http://download.csdn.net/detail/zdp072/7422401
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  • 原文地址:https://www.cnblogs.com/mqxnongmin/p/10536117.html
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