ActiveMQ学习一

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本文详细介绍如何使用ActiveMQ消息中间件，包括下载、安装、配置及开发实践。通过具体步骤展示如何在Windows和Linux环境下运行ActiveMQ服务，并提供了一个简单的Java示例，演示了如何创建生产者和消费者应用来发送和接收消息。

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转自:http://www.cnblogs.com/xwdreamer/archive/2012/02/21/2360818.html

1.下载ActiveMQ

去官方网站下载：http://activemq.apache.org/

2.运行ActiveMQ

windows:解压缩apache-activemq-5.14.4-bin.zip，然后双击apache-activemq-5.14.4\bin\win64(32)\activemq.bat运行ActiveMQ程序。

linux:解压缩apache-activemq-5.14.4-bin.tar.gz，然后进入apache-activemq-5.14.4\bin\linux-x86-64(32)目录下./activemq start,运行ActiveMQ程序。

启动ActiveMQ以后，登陆：http://localhost:8161/admin/，创建一个Queue，命名为FirstQueue。

3.创建Eclipse项目并运行

创建project：myActiveMQ，并导入activemq-all-5.14.4.jar

Producer.java

package com.test.activemq.queue;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MapMessage;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * 消息生产者
 * @author 
 *
 */
public class Producer{

	static final String HOST = "tcp://localhost:61616";
	
	//static final String HOST = ActiveMQConnection.DEFAULT_BROKER_URL;
	
	static final String USER = ActiveMQConnection.DEFAULT_USER;
	
	static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
	
	static final String QUEUE = "FirstQueue";//必须在activeQM里面有配置
	
	public static void main(String[] args) {
		
		//jms 连接工厂
		ConnectionFactory connectionFactory = null;
		
		//connection 生产者和消费者的连接对象
		Connection connection = null;
		
		//session 一个发送或接收消息的连接操作
		Session session = null;
		
		//destination 消息目的地
		Destination destination = null;
		
		//MessageProducer 消息发送者
		MessageProducer messageProducer = null;
		
		//  user  password  host
		connectionFactory = new ActiveMQConnectionFactory(USER,PASSWORD,HOST);
		
		try {
			//获得连接对象
			connection = connectionFactory.createConnection();
			//启动
			connection.start();
			//连接操作
			session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
			//创建目的地
			destination = session.createQueue(QUEUE);
			//创建生产者
			messageProducer = session.createProducer(destination);
			// 设置不持久化
			messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
			
			sendMessage(session, messageProducer);
			
			session.commit();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
		}
	}
	
	//发送消息
	public static void sendMessage(Session session, MessageProducer producer){
		try {
			for (int i = 0; i < 10; i++) {
//				TextMessage message = session.createTextMessage("activemq发送的消息"+i);
//				//发送消息到目的地
//				System.out.println("发送消息:activemq发送的消息"+i);
//				producer.send(message);
				
				MapMessage message = session.createMapMessage();
				message.setStringProperty("extra"+i, "extra map"+i);
				message.setString("message--"+i,"message map"+i);
				producer.send(message);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

Consumer.java

package com.test.activemq.queue;

import java.util.Enumeration;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.MapMessage;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Consumer{

	static final String HOST = "tcp://localhost:61616";
	
	//static final String HOST = ActiveMQConnection.DEFAULT_BROKER_URL;
	
	static final String USER = ActiveMQConnection.DEFAULT_USER;
	
	static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;
	
	static final String QUEUE = "FirstQueue";//必须在activeQM里面有配置
	
	public static void main(String[] args) {
		
		//jms 连接工厂
		ConnectionFactory connectionFactory = null;
		
		//connection 生产者和消费者的连接对象
		Connection connection = null;
		
		//session 一个发送或接收消息的连接操作
		Session session = null;
		
		//destination 消息目的地
		Destination destination = null;
		
		//消息接收者
		MessageConsumer messageConsumer = null;
		
		//获取工厂类
		connectionFactory = new ActiveMQConnectionFactory(USER, PASSWORD, HOST);
		
		try {
			//获取连接的对象
			connection = connectionFactory.createConnection();
			//启动连接
			connection.start();
			
			session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
			
			destination = session.createQueue(QUEUE);
			
			messageConsumer = session.createConsumer(destination);
			
			
			Enumeration names = connection.getMetaData().getJMSXPropertyNames();
			while (names.hasMoreElements()) {
				String name = (String) names.nextElement();
				System.out.println("属性"+name);
			}
			
			int i = 0;
			
			while (i<10) {
//                //设置接收者接收消息的时间，为了便于测试，这里谁定为100s
//                TextMessage message = (TextMessage) messageConsumer.receive(100000);
//                if (null != message) {
//                    System.out.println("收到消息" + message.getText());
//                } else {
//                    break;
//                }
				//设置接收者接收消息的时间，为了便于测试，这里谁定为100s
				MapMessage message = (MapMessage) messageConsumer.receive();
                
                session.commit();
                
                if (null != message) {
                    System.out.println("收到消息" + message.getString("message--"+i)+";property"+message.getStringProperty("extra"+i));
                } else {
                    break;
                }
                i++;
            }
			
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
                if (null != connection)
                    connection.close();
            } catch (Throwable ignore) {
            }
		}
	}
}