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ActiviteMQ分析

 
阅读更多

消息示例

1、ActiviteMQ消息有3种形式

 

JMS 公共

点对点域

发布/订阅域

ConnectionFactory

QueueConnectionFactory

TopicConnectionFactory

Connection

QueueConnection

TopicConnection

Destination

Queue

Topic

Session

QueueSession

TopicSession

MessageProducer

QueueSender

TopicPublisher

MessageConsumer

QueueReceiver

TopicSubscriber

(1)、点对点方式(point-to-point)

点 对点的消息发送方式主要建立在 Message Queue,Sender,reciever上,Message Queue 存贮消息,Sneder 发送消息,receive接收消息.具体点就是Sender Client发送Message Queue ,而 receiver Cliernt从Queue中接收消息和"发送消息已接受"到Quere,确认消息接收。消息发送客户端与接收客户端没有时间上的依赖,发送客户端可以在 任何时刻发送信息到Queue,而不需要知道接收客户端是不是在运行

(2)、发布/订阅 方式(publish/subscriber Messaging)

发 布/订阅方式用于多接收客户端的方式.作为发布订阅的方式,可能存在多个接收客户端,并且接收端客户端与发送客户端存在时间上的依赖。一个接收端只能接收 他创建以后发送客户端发送的信息。作为subscriber ,在接收消息时有两种方法,destination的receive方法,和实现message listener 接口的onMessage 方法。

2、ActiviteMQ接收和发送消息基本流程

image

发送消息的基本步骤:

(1)、创建连接使用的工厂类JMS ConnectionFactory

(2)、使用管理对象JMS ConnectionFactory建立连接Connection,并启动

(3)、使用连接Connection 建立会话Session

(4)、使用会话Session和管理对象Destination创建消息生产者MessageSender

(5)、使用消息生产者MessageSender发送消息

 

消息接收者从JMS接受消息的步骤

(1)、创建连接使用的工厂类JMS ConnectionFactory

(2)、使用管理对象JMS ConnectionFactory建立连接Connection,并启动

(3)、使用连接Connection 建立会话Session

(4)、使用会话Session和管理对象Destination创建消息接收者MessageReceiver

(5)、 使用消息接收者MessageReceiver接受消息,需要用setMessageListener将MessageListener接口绑定到 MessageReceiver消息接收者必须实现了MessageListener接口,需要定义onMessage事件方法。

 

 

五、 代码示例

在代码开始,我们先建一个project,在这个project中添加如下jar包

image

添加完jar包后就可以开始实际的代码工作了。

1、 使用JMS方式发送接收消息

消息发送者

package com.wsheng.mq.jms;
 
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
/**
 * <b>function:</b> 消息发送者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class MessageSender {
 
    // 发送次数
    public static final int SEND_NUM = 5;
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String DESTINATION = "wsheng.mq.queue";
    
   
    public static void sendMessage(Session session, MessageProducer producer) throws Exception {
        for (int i = 0; i < SEND_NUM; i++) {
            String message = "发送消息第" + (i + 1) + "条";
            TextMessage text = session.createTextMessage(message);
            
            System.out.println(message);
            producer.send(text);
        }
    }
    
    public static void run() throws Exception {
        
        Connection connection = null;
        Session session = null;
        try {
            // 创建链接工厂
            ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Destination destination = session.createQueue(DESTINATION);
            // 创建消息制作者
            MessageProducer producer = session.createProducer(destination);
            // 设置持久化模式
            producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
            sendMessage(session, producer);
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        MessageSender.run();
    }
}

 

接受者

package com.wsheng.mq.jms;
 
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
/**
 * <b>function:</b> 消息接收者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class MessageReceiver {
 
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String DESTINATION = "wsheng.mq.queue";
    
    
    public static void run() throws Exception {
        
        Connection connection = null;
        Session session = null;
        try {
            // 创建链接工厂
            ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Destination destination = session.createQueue(DESTINATION);
            // 创建消息制作者
            MessageConsumer consumer = session.createConsumer(destination);
            
            while (true) {
                // 接收数据的时间(等待) 100 ms
                Message message = consumer.receive(1000 * 100);
                
                TextMessage text = (TextMessage) message;
                if (text != null) {
                    System.out.println("接收:" + text.getText());
                } else {
                    break;
                }
            }
            
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        MessageReceiver.run();
    }
}

 

2、 Queue队列方式发送点对点消息数据

发送方

packagecom.wsheng.mq.jms;
 
import javax.jms.DeliveryMode;
import javax.jms.MapMessage;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSession;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
/**
 * <b>function:</b> Queue 方式消息发送者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class QueueSender {
    
    // 发送次数
    public static final int SEND_NUM = 5;
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String DESTINATION = "wsheng.mq.queue";
    
    /**
     * <b>function:</b> 发送消息
     * @createDate 2013-6-19 下午12:05:42
     * @param session
     * @param sender
     * @throws Exception
     */    
    public static void sendMessage(QueueSession session, javax.jms.QueueSender sender) throws Exception {
        for (int i = 0; i < SEND_NUM; i++) {
            String message = "发送消息第" + (i + 1) + "条";
            
            MapMessage map = session.createMapMessage();
            map.setString("text", message);
            map.setLong("time", System.currentTimeMillis());
            System.out.println(map);
            
            sender.send(map);
        }
    }
    
    public static void run() throws Exception {
        
        QueueConnection connection = null;
        QueueSession session = null;
        try {
            // 创建链接工厂
            QueueConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createQueueConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createQueueSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Queue queue = session.createQueue(DESTINATION);
            // 创建消息发送者
            javax.jms.QueueSender sender = session.createSender(queue);
            // 设置持久化模式
            sender.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
            sendMessage(session, sender);
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        QueueSender.run();
    }
}

接收方

package com.wsheng.mq.queue;
 
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSession;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
/**
 * <b>function:</b> 消息接收者; 依赖hawtbuf-1.9.jar
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package ccom.wsheng.mq.queue
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class QueueReceiver {
 
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String TARGET = "wsheng.mq.queue";
    
    
    public static void run() throws Exception {
        
        QueueConnection connection = null;
        QueueSession session = null;
        try {
            // 创建链接工厂
            QueueConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createQueueConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createQueueSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Queue queue = session.createQueue(TARGET);
            // 创建消息制作者
            javax.jms.QueueReceiver receiver = session.createReceiver(queue);
            
            receiver.setMessageListener(new MessageListener() { 
                public void onMessage(Message msg) { 
                    if (msg != null) {
                        MapMessage map = (MapMessage) msg;
                        try {
                            System.out.println(map.getLong("time") + "接收#" + map.getString("text"));
                        } catch (JMSException e) {
                            e.printStackTrace();
                        }
                    }
                } 
            }); 
            // 休眠100ms再关闭
            Thread.sleep(1000 * 100); 
            
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        QueueReceiver.run();
    }
}

 

3、 Topic主题发布和订阅消息

消息发送方

package com.wsheng.mq.topic;
 
import javax.jms.DeliveryMode;
import javax.jms.MapMessage;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
 
/**
 * <b>function:</b> Queue 方式消息发送者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class TopicSender {
    
    // 发送次数
    public static final int SEND_NUM = 5;
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String DESTINATION = "wsheng.mq.topic";
    
    /**
     * <b>function:</b> 发送消息
     * @author Josh, Wang(Sheng)
     * @createDate 2013-6-19 下午12:05:42
     * @param session 会话
     * @param publisher 发布者
     * @throws Exception
     */    
    public static void sendMessage(TopicSession session, TopicPublisher publisher) throws Exception {
        for (int i = 0; i < SEND_NUM; i++) {
            String message = "发送消息第" + (i + 1) + "条";
            
            MapMessage map = session.createMapMessage();
            map.setString("text", message);
            map.setLong("time", System.currentTimeMillis());
            System.out.println(map);
            
            publisher.send(map);
        }
    }
    
    public static void run() throws Exception {
        
        TopicConnection connection = null;
        TopicSession session = null;
        try {
            // 创建链接工厂
            TopicConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createTopicConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createTopicSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Topic topic = session.createTopic(DESTINATION);
            // 创建消息发送者
            TopicPublisher publisher = session.createPublisher(topic);
            // 设置持久化模式
            publisher.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
            sendMessage(session, publisher);
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        TopicSender.run();
    }
}

接收方

package com.wsheng.mq.topic;
 
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
 
/**
 * <b>function:</b> 消息接收者; 依赖hawtbuf-1.9.jar
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class TopicReceiver {
 
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String TARGET = "wsheng.mq.topic";
    
    
    public static void run() throws Exception {
        
        TopicConnection connection = null;
        TopicSession session = null;
        try {
            // 创建链接工厂
            TopicConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createTopicConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createTopicSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Topic topic = session.createTopic(TARGET);
            // 创建消息制作者
            TopicSubscriber subscriber = session.createSubscriber(topic);
            
            subscriber.setMessageListener(new MessageListener() { 
                public void onMessage(Message msg) { 
                    if (msg != null) {
                        MapMessage map = (MapMessage) msg;
                        try {
                            System.out.println(map.getLong("time") + "接收#" + map.getString("text"));
                        } catch (JMSException e) {
                            e.printStackTrace();
                        }
                    }
                } 
            }); 
            // 休眠100ms再关闭
            Thread.sleep(1000 * 100); 
            
            // 提交会话
            session.commit();
            
        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }
    
    public static void main(String[] args) throws Exception {
        TopicReceiver.run();
    }
}

 

4、 整合Spring实现消息发送和接收,在整合之前我们需要添加jar包,需要的jar包如下

image

这些jar包可以在D:\apache-activemq-5.8.0\lib这个lib目录中找到,添加完jar包后就开始编码工作。

消息发送者

package com.wsheng.mq.spring.support;
 
import java.util.Date;
import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.Session;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
 
/**
 * <b>function:</b> Spring JMSTemplate 消息发送者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class Sender {
 
    public static void main(String[] args) {
        ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:applicationContext-*.xml");
        JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate");
 
        jmsTemplate.send(new MessageCreator() {
            public Message createMessage(Session session) throws JMSException {
                MapMessage message = session.createMapMessage();
                message.setString("message", "current system time: " + new Date().getTime());
                
                return message;
            }
        });
    }
}

消息接收者

package com.wsheng.mq.spring.support;
 
import java.util.Map;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;
 
/**
 * <b>function:</b> Spring JMSTemplate 消息接收者
 * @author Josh, Wang(Sheng)
 * @file MessageSender.java
 * @package com.wsheng.mq.jms
 * @project ActiveMQ-5.8
 * @email josh_wang23@hotmail.com
 * @version 1.0
 */
public class Receiver {
 
    @SuppressWarnings("unchecked")
    public static void main(String[] args) {
        ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:applicationContext-*.xml");  
          
        JmsTemplate jmsTemplate = (JmsTemplate) ctx.getBean("jmsTemplate");  
        while(true) {  
            Map<String, Object> map =  (Map<String, Object>) jmsTemplate.receiveAndConvert();  
            
            System.out.println("收到消息:" + map.get("message"));  
        }  
    }
}

这里主要是用到了JmsTemplate这个消息模板,这个对象在spring的IoC容器中管理,所以要从spring的容器上下文中获取。下面看看spring的配置文件applicationContext-beans.xml内容:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.1.xsd">
    
    <!-- 连接池  -->
    <bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" destroy-method="stop">  
        <property name="connectionFactory">  
            <bean class="org.apache.activemq.ActiveMQConnectionFactory">  
                <property name="brokerURL" value="tcp://localhost:61616" />  
            </bean>  
        </property>  
    </bean>  
      
    <!-- 连接工厂 -->
    <bean id="activeMQConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">  
        <property name="brokerURL" value="tcp://localhost:61616" />  
    </bean>  
    
    <!-- 配置消息目标 -->
    <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue">  
        <!-- 目标,在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp -->
        <constructor-arg index="0" value="wsheng.mq.queue" />  
    </bean>  
 
    <!-- 消息模板 -->
    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">  
        <property name="connectionFactory" ref="activeMQConnectionFactory" />  
        <property name="defaultDestination" ref="destination" />  
        <property name="messageConverter">  
            <bean class="org.springframework.jms.support.converter.SimpleMessageConverter" />
        </property>  
    </bean>  
</beans>

这里的整合就比较简单了,如果你是web工程,那你在需要用jms的时候,只需用注入jmsTemplate即可。

 

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