RabbitMQ学习之队列监控

今天药忘吃喽~ 2022-07-13 08:41 219阅读 0赞

对于RabbitMQ的监控，除了服务器基本信息（硬盘、CPU、内存、IO等）以及MQ的进程和端口，我们也可以通过请求url访问[管理API][API]监控其集群和队列的情况。在java api 3.6.0以后，channel接口为我们提供了如下接口：

/** * Returns the number of messages in a queue ready to be delivered * to consumers. This method assumes the queue exists. If it doesn't, * an exception will be closed with an exception. * @param queue the name of the queue * @return the number of messages in ready state * @throws IOException Problem transmitting method. */
        long messageCount(String queue) throws IOException;
    
      /** * Returns the number of consumers on a queue. * This method assumes the queue exists. If it doesn't, * an exception will be closed with an exception. * @param queue the name of the queue * @return the number of consumers * @throws IOException Problem transmitting method. */
        long consumerCount(String queue) throws IOException;

**messageCount**：查询队列未消费的消息数，可以监控消息堆积的情况。  
**consumerCount**：队列的消费者个数，可以对消费者进行监控  
java实例：

public class JavaAPIMonitor { 
    
        private static String queue_name = "test_queue";
    
        public static void main(String[] args) throws Exception {
            ConnectionFactory factory = new ConnectionFactory();
            // amqp://userName:password@hostName:portNumber/virtualHost
            factory.setUri("amqp://test:test@10.1.199.169:5672/test");
            Connection conn = factory.newConnection();
            // System.out.println(conn.getChannelMax());
            Channel channel = conn.createChannel();
            // System.out.println(channel.getChannelNumber());
            System.out.println(channel.messageCount(queue_name));
            System.out.println(channel.consumerCount(queue_name));
            channel.close();
            conn.close();
        }
    }
    运行结果：
    277782
    3

![SouthEast][]

除此之外，也可以通过连接的状态变化，进行监控，如：连接被阻塞（内存，CPU等不足）

ConnectionFactory factory = new ConnectionFactory();
            Connection connection = factory.newConnection();
            connection.addBlockedListener(new BlockedListener() {
    
                public void handleUnblocked() throws IOException {
                    // 连接取消阻塞
                }
                public void handleBlocked(String reason) throws IOException {
                    // 连接阻塞
                }
            });
            connection.addShutdownListener(new ShutdownListener() {
                public void shutdownCompleted(ShutdownSignalException cause) {
                    //连接关闭
                }
            });

先关监控参考文章：  
1.[RabbitMQ之管理与监控][RabbitMQ]  
2.[REST API监控RabbitMQ][REST API_RabbitMQ]  
3.[如何监控RabbitMQ][RabbitMQ 1]  
4.[使用AMQP模拟检测来确认RabbitMQ是否运行][AMQP_RabbitMQ]  
5.[监控队列状态][Link 1]

[API]: https://rawcdn.githack.com/rabbitmq/rabbitmq-management/rabbitmq_v3_6_0/priv/www/api/index.html
[SouthEast]: /images/20220713/969184fc57a249a6a89f64d818cf246c.png
[RabbitMQ]: http://blog.chinaunix.net/uid-22312037-id-3468329.html
[REST API_RabbitMQ]: https://my.oschina.net/lzhaoqiang/blog/549921
[RabbitMQ 1]: http://docs-ci.oneapm.com/services_example/rabbitmq.html
[AMQP_RabbitMQ]: https://my.oschina.net/u/3421586/blog/890813
[Link 1]: https://my.oschina.net/u/3421586/blog/892269