ActiveMQ

ActiveMQ

1.什么是ActiveMQ

ActiveMQ 是Apache出品，最流行的，能力强劲的开源消息总线。ActiveMQ 是一个完全支持JMS1.1和J2EE 1.4规范的 JMS Provider实现，尽管JMS规范出台已经是很久的事情了，但是JMS在当今的J2EE应用中间仍然扮演着特殊的地位。

 

2.ActiveMQ的下载

主页：http://activemq.apache.org/ 

开发包及源码下载地址：http://activemq.apache.org/activemq-5111-release.html

ActiveMQ 服务启动地址：http://127.0.0.1:8161/admin/ 用户名/密码 admin/admin

 

 

 

ActiveMQ的点对点使用

Session.AUTO_ACKNOWLEDGE。当客户成功的从receive 方法返回的时候，或者从MessageListener.onMessage方法成功返回的时候，会话自动确认客户收到的消息。

Session.CLIENT_ACKNOWLEDGE。 客户通过消息的 acknowledge 方法确认消息。需要注意的是，在这种模式中，确认是在会话层上进行：确认一个被消费的消息将自动确认所有已被会话消 费的消息。例如，如果一个消息消费者消费了 10 个消息，然后确认第 5 个消息，那么所有 10 个消息都被确认。

Session.DUPS_ACKNOWLEDGE。 该选择只是会话迟钝的确认消息的提交。如果 JMS provider 失败，那么可能会导致一些重复的消息。如果是重复的消息，那么 JMS provider 必须把消息头的 JMSRedelivered 字段设置为 true。

 

消息生产者（MessageProducer）代码

package com.royal;

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

import javax.jms.*;

public class Producer {
    private static final String USERNAME= ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名
    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码
    private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址

    public static void main(String[] args) {
        System.out.println("host: " + BROKEURL);

        ConnectionFactory connectionFactory = null;//连接工厂
        Connection connection = null;//连接
        Session session = null;//会话
        Destination destination = null;//消息目的地,队列
        MessageProducer messageProducer = null;//消息生产者

        connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEURL);

        try {
            connection = connectionFactory.createConnection();
            connection.start();//启动连接
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            destination = session.createQueue("短信发送");

            messageProducer = session.createProducer(destination);

            //发送消息
            for (int i=0;i<10;i++){
                TextMessage textMessage = session.createTextMessage("13800001111:100" + i);
                messageProducer.send(destination,textMessage);
            }
            
        } catch (JMSException e) {
            e.printStackTrace();
        }finally {
            try {
                connection.close();
                session.close();
                messageProducer.close();
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }

    }
}

 

消息消费者（MessageConsumer ）代码

package com.royal;

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

import javax.jms.*;

public class Consumer {
    private static final String USERNAME= ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名
    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码
    private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址

    public static void main(String[] args) {
        System.out.println("host: " + BROKEURL);

        ConnectionFactory connectionFactory = null;//连接工厂
        Connection connection = null;//连接
        Session session = null;//会话
        Destination destination = null;//消息目的地,队列
        MessageConsumer messageConsumer = null;//消息生产者

        connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEURL);

        try {
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue("短信发送");
            messageConsumer = session.createConsumer(destination);

            //接受消息,主动获取
            /*for (int i=0;i<5;i++){
                TextMessage textMessage = (TextMessage) messageConsumer.receive();
                System.out.println(textMessage.getText());
            }*/

            //使用监听器接受消息
            messageConsumer.setMessageListener(new MessageListener() {
                public void onMessage(Message message) {
                    TextMessage textMessage = (TextMessage) message;
                    try {
                        System.out.println("消费的消息：" + textMessage.getText());
                    } catch (JMSException e) {
                        e.printStackTrace();
                    }
                }
            });

        } catch (JMSException e) {
            e.printStackTrace();
        }finally {
            /*try { //使用监听器，不需关闭资源
                connection.close();
                session.close();
                messageConsumer.close();
            } catch (JMSException e) {
                e.printStackTrace();
            }*/
        }
    }
}

 

ActiveMQ的发布和订阅

订阅代码

package com.royal;

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

import javax.jms.*;

public class Consumer1 {
    private static final String USERNAME= ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名
    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码
    private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址

    public static void main(String[] args) {
        System.out.println("host: " + BROKEURL);

        ConnectionFactory connectionFactory = null;//连接工厂
        Connection connection = null;//连接
        Session session = null;//会话
        Destination destination = null;//消息目的地,队列
        MessageConsumer messageConsumer = null;//消息生产者

        connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEURL);

        try {
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
            destination = session.createTopic("短信发送");
            messageConsumer = session.createConsumer(destination);

            //使用监听器接受消息
            messageConsumer.setMessageListener(new MessageListener() {
                public void onMessage(Message message) {
                    TextMessage textMessage = (TextMessage) message;
                    try {
                        System.out.println("消费的消息：" + textMessage.getText());
                    } catch (JMSException e) {
                        e.printStackTrace();
                    }
                }
            });

        } catch (JMSException e) {
            e.printStackTrace();
        }
    }
}

copy几个进行测试

 

发布代码

package com.royal;

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

import javax.jms.*;

public class Producer {
    private static final String USERNAME= ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名
    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码
    private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址

    public static void main(String[] args) {
        System.out.println("host: " + BROKEURL);

        ConnectionFactory connectionFactory = null;//连接工厂
        Connection connection = null;//连接
        Session session = null;//会话
        Destination destination = null;//消息目的地,队列
        MessageProducer messageProducer = null;//消息生产者

        connectionFactory = new ActiveMQConnectionFactory(USERNAME,PASSWORD,BROKEURL);

        try {
            connection = connectionFactory.createConnection();
            connection.start();//启动连接
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            destination = session.createTopic("短信发送");

            messageProducer = session.createProducer(destination);

            //发送消息
            for (int i=0;i<10;i++){
                TextMessage textMessage = session.createTextMessage("13800001111:100" + i);
                messageProducer.send(destination,textMessage);
            }

        } catch (JMSException e) {
            e.printStackTrace();
        }finally {
            try {
                connection.close();
                session.close();
                messageProducer.close();
            } catch (JMSException e) {
                e.printStackTrace();
            }
        }

    }
}