Spring + ActiveMQ 整合实现点对点（point to point）消息发送案例

本节演示点对点模式的消息发送的 Spring + ActiveMQ 代码。

Spring + ActiveMQ 整合

1、依懒包

spring：4.2.5.RELEASE，activemq-all：5.15.0

<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>


    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>2.9.1</version>
    </dependency>


    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <version>2.9.1</version>
    </dependency>


    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.0</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.2.5.RELEASE</version>
    </dependency>


    <dependency>
      <groupId>org.apache.activemq</groupId>
      <artifactId>activemq-all</artifactId>
      <version>5.15.0</version>
    </dependency>


    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
      <version>2.4.2</version>
    </dependency>

2、工程介绍

• producer 生产者工程
• consumer 消费者工程

3、整合关键类 JmsTemplate

Spring 官方提供了一个 JmsTemplate 的类，这个类就专门用来处理JMS的，在该类的Bean配置标签中有两个属性connectionFactory-ref 和 defaultDestination-ref 正好对应 JMS 中的 ConnectionFactory 和 Destination。

点对点（point to point）消息发送

1、生产者代码

• spring 关键代码：springContext-activemq.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  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.xsd">


  <!-- 创建一个ConnectionFactory,为了提升性能用了连接池 -->
  <bean id="connectionFactory" 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</value>
        </property>
      </bean>
    </property>
    <property name="maxConnections" value="50" />
  </bean>


  <!-- 创建消息目的地，constructor-arg是目的地的名称，此处为spring-queue -->
  <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue">
    <constructor-arg index="0" value="spring-queue" />
  </bean>


  <!-- 构建JmsTemplate -->
  <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
    <property name="connectionFactory" ref="connectionFactory" />
    <property name="defaultDestination" ref="destination" />
    <property name="messageConverter">
      <bean
        class="org.springframework.jms.support.converter.SimpleMessageConverter" />
    </property>
  </bean>


</beans>

• 生产者关键代码：SpringMessageSender

package producer;


import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
import javax.jms.TextMessage;


import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;


/**
 * 点对点（point to point）消息发送，spring整合
 * 
 * @author JPM
 */
public class SpringMessageSender {
  public static void main(String[] args) {


    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
        "classpath:spring/springContext-activemq.xml");
    JmsTemplate jmsTemplate = (JmsTemplate) context.getBean("jmsTemplate");
    jmsTemplate.send(new MessageCreator() {


      public Message createMessage(Session session) throws JMSException {
        TextMessage message = session.createTextMessage();
        message.setText("hello,spring-queue!");
        return message;
      }
    });
    context.close();
  }
}

运行 SpringMessageSender 类，查看 ActiveMQ 管理界面

说明消息已经发送到了 spring-queue 中。

2、消费者代码（receive方法获取消息）

• spring 关键代码：springContext-activemq.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  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.xsd">


  <bean id="connectionFactory" 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</value>
        </property>
      </bean>
    </property>
    <property name="maxConnections" value="50" />
  </bean>
  <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue">
    <constructor-arg index="0" value="spring-queue" />
  </bean>


  <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
    <property name="connectionFactory" ref="connectionFactory" />
    <property name="defaultDestination" ref="destination" />
    <property name="messageConverter">
      <bean
        class="org.springframework.jms.support.converter.SimpleMessageConverter" />
    </property>
  </bean>


</beans>

• 消费者关键代码：SpringMessageReceiver

package consumer;


import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jms.core.JmsTemplate;


/**
 * 点对点（point to point）消息接收，spring整合
 * 
 * @author JPM
 */
public class SpringMessageReceiver {


  public static void main(String[] args) {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
        "classpath:spring/springContext-activemq.xml");
    JmsTemplate jmsTemplate = (JmsTemplate) context.getBean("jmsTemplate");
    String message = (String) jmsTemplate.receiveAndConvert();
    System.out.println(message);
    context.close();
  }
}

运行 SpringMessageReceiver 类，查看控制台和 ActiveMQ 管理界面

说明消费者读取到了消息，并打印到控制台显示。

3、消费者代码（使用消息监听器获取消息）

• 使用刚才的生产者，再次发送一条消息

spring 关键代码：springContext-activemq.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  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.xsd">


  <bean id="connectionFactory" 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</value>
        </property>
      </bean>
    </property>
    <property name="maxConnections" value="50" />
  </bean>
  <bean id="destination" class="org.apache.activemq.command.ActiveMQQueue">
    <constructor-arg index="0" value="spring-queue" />
  </bean>


  <bean id="jmsContainer"
    class="org.springframework.jms.listener.DefaultMessageListenerContainer">
    <property name="connectionFactory" ref="connectionFactory" />
    <property name="destination" ref="destination" />
    <property name="messageListener" ref="messageListener" />
  </bean>


  <bean id="messageListener" class="consumer.SpringMessageListener" />


</beans>

消费者关键代码：SpringMessageListener

package consumer;


import java.io.IOException;


import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;


import org.springframework.context.support.ClassPathXmlApplicationContext;


/**
 * 点对点（point to point）消息接收，spring整合，使用Listener
 * 
 * @author JPM
 */
public class SpringMessageListener implements MessageListener {


  public void onMessage(Message message) {
    String msg = null;
    try {
      msg = ((TextMessage) message).getText();
    } catch (JMSException e) {
      e.printStackTrace();
    }
    System.out.println(msg);
  }


  public static void main(String[] args) {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
        "classpath:spring/springContext-activemq.xml");
    try {
      System.in.read();
    } catch (IOException e) {
      e.printStackTrace();
    }
    context.close();
  }


}

运行 SpringMessageListener 类，查看控制台和 ActiveMQ 管理界面

说明消费者读取到了消息，并打印到控制台显示。

使用 Listener 和 receive方法的区别在于 Listener 会一直运行，主动监听消息的变化，及时消费。

Listener 验证，再次运行生产者，观察 ActiveMQ 管理界面