另外，它允许对应用程序指标轮询，如事务率和时间、mq队列管理器状态、消息计数器或SLM指标。
Additionally, it allows polling of application metrics such as transaction rates and times, MQ queue manager status, message counters, or SLM metrics.
数码相机将能自动上传照，智能计数器可以发送房子的耗电量，所有的感应器都能发送消息，油箱没油了量油计都能发送提醒。
Smart meters will send readings of how much electricity a house consumes. All kinds of sensors will be able to send messages, even things like dipsticks when tanks of liquid are low.
显示系统当前严重警报、事件日志消息、性能和计数器。
Displays your system's current critical alerts, event log messages, performance, and counters.
乍一看，似乎觉得计数器是根据订阅设置QoS的；但是每条消息的QoS都是由MQTT发布服务器设置的。
At first glance, it may seem counter intuitive to set the QoS on the subscription; specially, when the QoS for each message is set by an MQTT publisher.
统计信息由消息驱动的 bean (MDB)收集，MDB被构建为在收到消息时侦听主题并增量内部计数器。
The statistics are being collected by a message-driven bean (MDB) that is constructed to listen to the topic and increment an internal counter when a message is received.
可以通过在计时器请求消息本身中带一个计数器，并在每次尝试之后进行递增，从而完成此任务，请参阅前面“Redrive”的讨论。
(This could be done by carrying a counter in the timer request message itself and incrementing each time thru, see the discussion of "Redrive" previously).
可以通过在计时器请求消息本身中带一个计数器，并在每次尝试之后进行递增，从而完成此任务，请参阅前面“Redrive”的讨论。
(This could be done by carrying a counter in the timer request message itself and incrementing each time thru, see the discussion of "Redrive" previously).
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