不论在客户端应用程序还是服务器组件(包括窗口服务)定时器通常扮演一个重要的角色。
Timers often play an important role in both client applications and server-based components (including Windows services).
这会在8070端口启动一个TCP服务器，它在任意一个客户端与本机的8080端口(在本例中，由Tomcat提供)之间扮演一个中介的角色。
This starts a TCP server on port 8070 that ACTS as an intermediary between any client and port 8080 on the local host, which in this case is serviced by Tomcat.
该测试应用程序是一个简单的JMS应用程序，它同时扮演了客户端和服务器，并且使用单个数值作为参数。
The test application is a simple JMS application that ACTS both as the client and the server, and takes a single number as an argument.
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