RabbitMQ学习之队列监控

来源：互联网发布：java中isnotempty 编辑：程序博客网时间：2024/06/05 16:01

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访问管理页面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：2777823

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

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