以编程方式开始/停止片段 [英] Start / Stop Fragment Programmatically

问题描述

我想在OSGI中实现一个功能切换，这意味着我想以编程方式启动和停止软件包。

I want to implement a feature toggle in OSGI, which means I want to start and stop bundles programmatically.

对于非常容易的插件：

Bundle plugin = //...
plugin.start();
plugin.stop();

对于片段，这不是那么容易。停止不起作用，如果我使用 uninstall（）片段已经不好了，我无法再安装，因为我不知道正确的位置 BundleContext＃installBundle（...）（并查看 Bundle＃getLocation（）这个片段本身）。

For fragments it's not so easy. Stopping does not work at all, and if I use uninstall() the fragment is gone for good, and I'm not able to install it again, since I don't know the correct location for BundleContext#installBundle(...) (and looking at Bundle#getLocation(), neither does the fragment itself).

我面临的问题是有一个片段有助于一些Eclipse扩展点。只是停止主机插件不会删除这些服务（无论什么原因）。所以我需要手动停止该片段（或者可能会清楚那个保持螺丝拧紧应用程序的愚蠢Eclipse缓存？）。

The problem I'm facing is I have a fragment contributing to some Eclipse extension points. Just stopping the host plug-in will not remove these services (for whatever reason). So I need to stop the fragment manually (or maybe clear that stupid Eclipse cache that keeps screwing applications up?).

那么如何在运行时安装碎片？ p>

So how can I install fragments at runtime?

推荐答案

片段没有自己的生命周期。它们是主机捆绑的生命周期的一部分。这意味着没有办法独立于主机启动/停止它们。

Fragments do not have their own life cycle. They are part of the life cycle of their host bundle. That means there is no way to start/stop them independently of the host.

如果您需要更多关于捆绑，碎片和生命周期的背景知识，我建议您阅读OSGi规范，可从 http://osgi.org/ 网站下载。

If you need more background about bundles, fragments and life cycles, I advise you to read the OSGi specification, which can be downloaded from the http://osgi.org/ website.

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