通常使用这个模式检验应用程序的服务质量和调优需求。
This pattern is typically used to verify quality of service and tuning requirements of an application.
这个例子使用了由XMethods支持的“书价检验程序”Web服务，该服务返回请求中给定isbn的书的价格。
This example USES the "book price checker" Web service hosted by XMethods, which returns the price of the book whose ISBN is listed in the request.
这样的处理程序有助于调试Web服务应用程序的问题，或者简单地说，它扮演着“心跳”的角色，检验请求是否已接收到。
Such a handler helps debug problems with web services applications, or simply ACTS as a 'heartbeat' to verify that requests are being received.
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