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
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
2.REST API监控RabbitMQ
3.如何监控RabbitMQ
4.使用AMQP模拟检测来确认RabbitMQ是否运行
5.监控队列状态