activemq的使用

一.常用的消息队列:

1 activemq java，apache

2 rabbitmq c的mq

3 kafuka 大数据mq

4 zeromq 简单版的mq

5 mateMq 基于amqp

6 RocketMQ 阿里

 

二.mq的使用

1 解压和启动mq

---

 

activeMq start

 

 

 

 三 .mq的角色

producer消息的发送者

Comsumer消息的消费者

queue方式; 把消息发给activemq服务器,消费端监听到只要有一个执行完成其他就不会再执行了.

topic方式: 把消息发给activemq服务器,消费端监听到都会执行.

 

 

 

 

 

四: 加入Pom依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-activemq</artifactId>
   <exclusions>
      <exclusion>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-log4j12</artifactId>
      </exclusion>
   </exclusions>
</dependency>

<dependency>
   <groupId>org.apache.activemq</groupId>
   <artifactId>activemq-pool</artifactId>
   <version>5.15.2</version>
   <exclusions>
      <exclusion>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-log4j12</artifactId>
      </exclusion>
   </exclusions>
</dependency>

 五:页面访问地址：localhost:8161  ,账号密码都是admin 

六:整合activemq客户端到项目中

@Configuration
public class ActiveMQConfig {

    @Value("${spring.activemq.broker-url:disabled}")
    String brokerURL ;

    @Value("${activemq.listener.enable:disabled}")
    String listenerEnable;

    @Bean
    public ActiveMQUtil getActiveMQUtil() throws JMSException {
        if(brokerURL.equals("disabled")){
            return null;
        }
        ActiveMQUtil activeMQUtil=new ActiveMQUtil();
        activeMQUtil.init(brokerURL);
        return  activeMQUtil;
    }

    //定义一个消息监听器连接工厂，这里定义的是点对点模式的监听器连接工厂
    @Bean(name = "jmsQueueListener")
    public DefaultJmsListenerContainerFactory jmsQueueListenerContainerFactory(ActiveMQConnectionFactory activeMQConnectionFactory ) {
        DefaultJmsListenerContainerFactory factory = new DefaultJmsListenerContainerFactory();
        if(!listenerEnable.equals("true")){
            return null;
        }

        factory.setConnectionFactory(activeMQConnectionFactory);
        //设置并发数
        factory.setConcurrency("5");

        //重连间隔时间
        factory.setRecoveryInterval(5000L);
        factory.setSessionTransacted(false);
        factory.setSessionAcknowledgeMode(Session.CLIENT_ACKNOWLEDGE);

        return factory;
    }


    @Bean
    public ActiveMQConnectionFactory activeMQConnectionFactory ( ){
/*        if((url==null||url.equals(""))&&!brokerURL.equals("disabled")){
            url=brokerURL;
        }*/
        ActiveMQConnectionFactory activeMQConnectionFactory =
                new ActiveMQConnectionFactory(  brokerURL);
        return activeMQConnectionFactory;
    }

}

---

public class ActiveMQUtil {
    PooledConnectionFactory pooledConnectionFactory=null;

    public ConnectionFactory init(String brokerUrl) {

        ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(brokerUrl);
        //加入连接池
        pooledConnectionFactory=new PooledConnectionFactory(factory);
        //出现异常时重新连接
        pooledConnectionFactory.setReconnectOnException(true);
        //
        pooledConnectionFactory.setMaxConnections(5);
        pooledConnectionFactory.setExpiryTimeout(10000);
        return pooledConnectionFactory;
    }

    public ConnectionFactory getConnectionFactory(){
        return pooledConnectionFactory;
    }
}

---

例子: 
支付controller 层支付成功后,发送系统消息 =》 更新订单状态  锁定商品库存  物流订单等等,例如在支付的service层发送消息告诉订单需要更改状态, 然后在订单服务里面写component注解,里面实现监听更改业务即可.

@RequestMapping("alipay/callback/return")
public String alipay_callback(Model model, HttpServletRequest request){

    String alipay_trade_no = request.getParameter("trade_no");//支付宝的交易单号
    String order_sn = request.getParameter("out_trade_no");// 外部订单号total_amount
    String pay_amount = request.getParameter("total_amount");

    // 更新支付信息
    PaymentInfo paymentInfo = new PaymentInfo();
    // 交易单号
    // 支付状态
    String payment_status = "已支付";
    // 回调内容
    String callback_content = request.getQueryString();
    // 回调时间
    Date callback_time = new Date();

    paymentInfo.setOrderSn(order_sn);
    paymentInfo.setPaymentStatus(payment_status);
    paymentInfo.setCallbackTime(callback_time);
    paymentInfo.setAlipayTradeNo(alipay_trade_no);
    paymentInfo.setCallbackContent(callback_content);
    paymentInfo.setTotalAmount(new BigDecimal(pay_amount));
    paymentService.updatePayment(paymentInfo);

    // 发送系统消息 =》 更新订单状态  锁定商品库存  物流订单等等
    paymentService.sendPaymentResult(paymentInfo);

    return "finish";
}

---

@Autowired
ActiveMQUtil activeMQUtil;

@Override
public void sendPaymentResult(PaymentInfo paymentInfo) {

    ConnectionFactory connectionFactory = activeMQUtil.getConnectionFactory();

    Connection connection = null;
    Session session = null;// 开启消息事务
    Queue paymentResultQueue = null; // 队列
    MessageProducer producer = null;
    try {
        connection = connectionFactory.createConnection();
        connection.start();
        session = connection.createSession(true, Session.SESSION_TRANSACTED);
        paymentResultQueue = session.createQueue("PAYMENT_SUCCESS_QUEUE");
        //text文本格式，map键值格式
        MapMessage mapMessage=new ActiveMQMapMessage();
        mapMessage.setString("out_trade_no",paymentInfo.getOrderSn());
        mapMessage.setDouble("pay_amount",paymentInfo.getTotalAmount().doubleValue());
        producer = session.createProducer(paymentResultQueue);// 消息的生成者
        producer.send(mapMessage);
        session.commit();
    } catch (JMSException e) {
        e.printStackTrace();
    }finally {
        try {
            producer.close();
            session.close();
            connection.close();
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }
}

---

@Component
public class OrderConsumer {

    @Autowired
    OrderService orderService;

    @JmsListener(containerFactory = "jmsQueueListener",destination = "PAYMENT_SUCCESS_QUEUE")
    public void consumePaymentSuccess(MapMessage mapMessage) throws JMSException {
        String out_trade_no = mapMessage.getString("out_trade_no");
        Double pay_amount = mapMessage.getDouble("pay_amount");

        // 根据支付状态，更新订单信息
        OmsOrder omsOrder = new OmsOrder();
        omsOrder.setPayAmount(new BigDecimal(pay_amount));
        omsOrder.setPaymentTime(new Date());
        omsOrder.setOrderSn(out_trade_no);
        omsOrder.setStatus("1");
        orderService.updateOrder(omsOrder);

        System.out.println("已监听到"+out_trade_no+"号订单，订单消费PAYMENT_SUCCESS_QUEUE队列");

    }

}