activeMQ

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activeMQ：消息中间件是在分布式系统中完成消息的发送和接受的基础软件

应用场景：

支付成功后由activeMQ进行后续的成本计算、商户计费、财务更新、风控归档等推送消息

有点对点模式和发布者订阅者模式（rabbitMQ）上架商品时项目中更改商品状态、发送消息到MQ中，商品信息保存到索引库，单品页静态化处理

点对点使用：

配置

发送方;

<bean id="pooledConnectionFactoryBean" class="org.apache.activemq.pool.PooledConnectionFactoryBean">
           <property name="connectionFactory" ref="activeMQConnectionFactory"/>
       </bean>

       
       <bean id="singleConnectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
           <property name="targetConnectionFactory" ref="pooledConnectionFactoryBean"/>
       </bean>

       
       <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
           <property name="connectionFactory" ref="singleConnectionFactory"/>
           
           <property name="defaultDestinationName" value="productId"/>
       </bean>

//发送消息给MQ
           jmsTemplate.send(new MessageCreator() {
               @Override
               public Message createMessage(Session session) throws JMSException {
                   // TODO Auto-generated method stub
                   return session.createTextMessage(String.valueOf(id));
               }
           });

接收方：

<bean id="activeMQConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
           <property name="brokerURL" value="tcp://192.168.200.128:61616"/>
           <property name="userName" value="admin"/>
           <property name="password" value="admin"/>
       </bean>

       
       <bean id="pooledConnectionFactoryBean" class="org.apache.activemq.pool.PooledConnectionFactoryBean">
           <property name="connectionFactory" ref="activeMQConnectionFactory"/>
       </bean>

       
       <bean id="singleConnectionFactory" class="org.springframework.jms.connection.SingleConnectionFactory">
           <property name="targetConnectionFactory" ref="pooledConnectionFactoryBean"/>
       </bean>

       
       <bean id="customMessageListener" class="com.core.service.message.CustomMessageListener"></bean>

        
        <bean class="org.springframework.jms.listener.DefaultMessageListenerContainer">
           <property name="connectionFactory" ref="singleConnectionFactory"/>
           <property name="destinationName" value="productId"/>
           <property name="messageListener" ref="customMessageListener"/>
        </bean>

处理类的代码

public class CustomMessageListener implements MessageListener{


   @Autowired
   private SearchService searchService;
   @Override
   public void onMessage(Message message) {
       // TODO Auto-generated method stub
       ActiveMQTextMessage atm = (ActiveMQTextMessage)message;
       try {
           String id = atm.getText();
           //保存商品信息到Solr服务器
           searchService.insertProductToSolr(Long.parseLong(id));
       } catch (JMSException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

   }

}

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