我们可以创建测试客户端，它使用代理发送请求消息到服务实现，进行定制。

We can create a test client that USES the proxy to send a request message to the service implementation asking for an order.

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典型的消息代理系统经常将以异步方式处理来自相同流或并行队列的多个请求。

A typical message broker system will often be processing multiple requests from the same stream or queue in a parallel, asynchronous manner.

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代理类会为您完成定位Web服务、发送请求消息以及向您返回响应(股票价格)等全部工作。

The proxy classes do all the work to locate your Web service, send the request message, and return the response (the stock price) to you.

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