所有的检查都是利用国家和通知代理，并命名活动的通知队列。

All checks are done using the State and notification Broker and Named Events in the notification queue.

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它不断将消息放置到输入队列上，并通知您放置操作的状态。

It keeps putting messages on the input queue and informs you about the status of the put.

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亚马逊还有另一项通知服务，称为简单队列服务，简称SQS，采用轮询的方式处理消息。

Amazon has another notification service, Simple Queue service (SQS), using a polling-based approach to messaging.

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