This document, along with the samples and Javadoc™ in the IBM Sametime Software Development Kit (SDK), provides you with the information you need to build Eclipse plug-ins that extend the capabilities of IBM Sametime Connect and integrate your own applications with IBM Sametime.
1、Eclipse的设计思想是：一切皆插件。Eclipse核心很小，其它所有功能都以插件的形式附加于Eclipse核心之上。Eclipse基本内核包括：图形API (SWT/Jface)， Java开发环境插件(JDT )，插件开发环境(PDE)等。
Eclipse 中的所有东西都是插件，但是，某些插件比其它插件更重要些。Workbench 和 Workspace 是 Eclipse 平台的两个必备的插件 ― 它们提供了大多数插件使用的扩展点，插件需要扩展点才可以插入，这样它才能运行。
“在eclipse中开发要习惯每天6个小时阅读代码，一个小时编程。即便这样你也会发现自己的生产效率非常高。”
2、When you’ve finished developing and testing your custom plug-in for IBM Sametime Connect, you’ll need to make your plug-in available to your target end users. To do so, you have a couple of options:
A、Work with the Sametime administrator to automatically provision your plug-in to all IBM Sametime Connect users in a particular community. When using this option, your plug-in is automatically downloaded to the client when the user launches IBM Sametime Connect. The user is notified of the update and can have the client restart automatically to load the new plug-in. The user doesn’t need to take any other action.
B、Post your plug-in on an Eclipse update site, and instruct end users to install the plug-in using the IBM Sametime Connect Install Plug-ins UI. Note that Sametime administrators can disable the ability for end users to install plug-ins in this way, in which case you’ll need to use the first option.