This example USES a predefined "ping" Nagios plug-in, which sends Internet Control Message Protocol (ICMP) echo requests to determine if a host is responsive or not.
这个示例使用了一个预定义的“ping”Nagios插件，它将发送Internet控制信息协议(Internet Control Message Protocol, ICMP)回显请求以确定主机是否有响应。
Certain predefined situations are triggered when there are faults caused by Web services, such as when message sizes or response times for the Web services exceed the configured thresholds.
当Web服务导致错误时(如web服务的消息大小或响应时间超过配置的阈值时)，将触发特定的预定义境况。
From a message Broker perspective, target endpoints need note be predefined in your message flow, since they can be retrieved dynamically at runtime.
从Message Broker的角度看，不需要在消息流中预定义目标端点，因为可以在运行时动态检索这些端点。
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