获取api的所有实现 [英] get all implementations of an api

问题描述

我已经编写了API捆绑包和一些实施服务.

I have written an API Bundle and some implementing services.

现在我想将它们用作插件，所以首先我需要列出我拥有的所有服务.

Now i want to use them as plugins, so first of all i need a list of all the services i have.

我正在像这样启动api:

I'm starting the api like this:

    Framework m_fwk = new org.apache.felix.framework.FrameworkFactory().newFramework(null);
    m_fwk.init();
    AutoProcessor.process(null, m_fwk.getBundleContext());
    m_fwk.start();

    Bundle api = m_fwk.getBundleContext().installBundle(
    "file:/foo/bar/api/target/api-1.0.jar");

    api.start();

因此，现在已加载API.现在我需要知道哪些捆绑软件实现了此API，如何从框架中获取此信息?

So now the API is loaded. Now i need to know which bundles implements this API, how can i get this information from the framework?

推荐答案

您似乎只加载了一个API捆绑包，我想您想为实现安装其他捆绑包?然后，大多数人会聘请导演左右:

You only seem to load an API bundle, I guess you want to install other bundles for the implementations? Most people then load a director or so:

for ( File b : bundles.listFiles() ) {
    ctx.installBundle( b.toURI().toURL() );
}

这些捆绑包中的每一个都应该看起来像(使用DS):

Each of these bundle should look like (using DS):

@Component
public class Impl implements API {
  public whatever() { ... }
}

收集服务的捆绑软件如下所示:

The bundle collecting the services could look like:

@Component
public class Collector {
  @Reference(type='*')
  void addAPI( API api ) { ... }
  void removeAPI( API api ) { ... }
}

这是通过DS的bnd注释完成的(有关示例，请参见bndtools).但是，您也可以在Blueprint，iPojo和许多其他帮助器中实现/收集服务.

This is done with the bnd annotations for DS (see bndtools for examples). However, you can also implement/collect the services in Blueprint, iPojo, and many other helpers.

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