该工具由运行时库和前端图形用户界面组成，前者必须在启动所要监视的应用程序时加载，后者可以显示结果和性能分析。
The tool consists of a runtime library that must be loaded at startup with the application you wish to monitor and a front-end graphical user interface that displays the results and performs analysis.
本文中讨论的示例的用户界面是一组JSR 168 portlet，它们提供了访问Domino应用程序的前端。
The user interface for the examples discussed in this article is a set of JSR 168 portlets that provide the frontend to access the Domino application.
创建假的数据层是一种有用的用户界面开发实践，因为最终应用程序要使用的持续存储层对于前端开发人员来说，通常是看不到的。
Creating a fake data layer is a useful UI development practice because the persistence layer to be used by the final application is often unavailable to front-end developers.
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