分布式服务框架学习笔记8 ActiveMQ入门使用

测试环境

windows+Eclipse
下载
http://activemq.apache.org/download-archives.html

下载后 打开c:/tools/apache-activemq-5.9.0/bin/activemq.bat启动服务

添加依赖

    <dependency>  
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-all</artifactId>
        <version>5.14.1</version>
    </dependency>

Persistence持久化存储

• AMQ Message Store
  ActiveMQ 5.0 的缺省持久化存储方式。

• Kaha Persistence
  这是一个专门针对消息持久化的解决方案。它对典型的消息使用模式进行了优化。

• JDBC Persistence
  数据库方式：Apache Derby, Axion, DB2, HSQL, Informix, MaxDB, MySQL, Oracle, Postgresql, SQLServer, Sybase。

• Disable Persistence
  不应用持久化存储。

方法解析

生产者创建过程

消费者消费消息

代码

App.java

package com.whrsmart.ActiveMQ;

import javax.jms.JMSException;

import org.apache.activemq.ActiveMQConnection;

/**
 *
 */
public class App 
{
    public static void main( String[] args )
    {
         String username = "admin1";
         String password = "admin1";
         String url = ActiveMQConnection.DEFAULT_BROKER_URL;
         // 创建生产者
         Producer producer;
         try {
             producer = new Producer(url, username, password);
             // 生产者产生一条消息
             producer.sendMessage("Hello World");

             // 创建消费者
             Consumer consumer = new Consumer(url, username, password);
             // 消费者读取一条消息
             Object msg = consumer.receive();

             // 输出消息内容
             System.out.println(msg);

             producer.close();
             consumer.close();
         } catch (JMSException e) {
             e.printStackTrace();
         }
    }
}

Consumer.java

package com.whrsmart.ActiveMQ;

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

import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * 消费者
 *
 */
public class Consumer {

    /**
     * 用户名
     */
    private String username;

    /**
     * 密码
     */
    private String password;

    /**
     * 连接地址，host:port，如localhost:8161
     */
    private String url;

    /**
     * 队列名
     */
    private static final String QUEUE_NAME = "HELLO";

    //连接工厂
    private ConnectionFactory connectionFactory;

    //会话 接受或者发送消息的线程
    private Session session;

    //消息的目的地
    private Destination destination;

    //消息消费者
    private MessageConsumer messageConsumer;

    //与MQ的连接
    private Connection connection = null;

    public Consumer(String url, String username, String password) throws JMSException {
        this.url = url;
        this.username = username;
        this.password = password;
        this.init();
    }

    /**
     * 初始化方法
     * @throws JMSException 
     */
    private void init() throws JMSException {
        // 实例化工厂
        connectionFactory = new ActiveMQConnectionFactory(
                username, password, url);
        // 获取连接
        connection = connectionFactory.createConnection();
        // 启动
        connection.start();
        // 获取session
        session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
        // 创建指定队列名的队列
        destination = session.createQueue(Consumer.QUEUE_NAME);
        // 创建消息消费者
        messageConsumer = session.createConsumer(destination);
    }

    /**
     * 接收消息
     * @throws JMSException 
     */
    public String receive() throws JMSException {
        TextMessage msg = (TextMessage) messageConsumer.receive(5000);
        if(msg == null) {
            return null;
        }
        return msg.getText();
    }

    public void close() throws JMSException {
        session.close();
        connection.close();
    }

}

Producer.java

package com.whrsmart.ActiveMQ;

import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * 生产者
 */
public class Producer implements Cloneable{

    /**
     * 用户名
     */
    private String username;

    /**
     * 密码
     */
    private String password;

    /**
     * 连接地址，host:port，如localhost:8161
     */
    private String url;

    /**
     * 队列名
     */
    private static final String QUEUE_NAME = "HELLO";

    //连接工厂
    private ConnectionFactory connectionFactory;

    //会话 接受或者发送消息的线程
    private Session session;

    //消息的目的地
    private Destination destination;

    //消息生产者
    private MessageProducer messageProducer;

    //与MQ的连接
    private javax.jms.Connection  connection = null;

    public Producer(String url, String username, String password) throws JMSException {
        this.url = url;
        this.username = username;
        this.password = password;
        this.init();
    }

    /**
     * 初始化方法
     * @throws JMSException 
     */
    private void init() throws JMSException {
        // 实例化工厂
        connectionFactory = new ActiveMQConnectionFactory(username, password, url);
        // 获取连接
        connection = connectionFactory.createConnection();
        // 启动
        connection.start();
        // 获取session
        session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        // 创建指定队列名的队列
        destination = session.createQueue(Producer.QUEUE_NAME);
        // 创建消息生产者
        messageProducer = session.createProducer(destination);
    }

    /**
     * 发送消息
     * @param data 数据
     * @throws JMSException 
     */
    public void sendMessage(String data) throws JMSException {
        // 创建一个Message
        TextMessage msg = session.createTextMessage(data);
        // 通过消息发送者进行消息发送
        this.messageProducer.send(msg);
    }

    public void close() throws JMSException {
        session.close();
        connection.close();
    }
}

本文参考：
http://www.tuicool.com/articles/EjyqA3R