在Android中嵌入OSGi Felix

Question

我的问题与旧的未解决的问题Android embedded Felix missing requirement osgi.ee非常相关。

我只是将OSGi Felix 5.4.0的一个实例嵌入到一个安卓应用程序中，并试图在其中安装一个纯Java非常简单的捆绑包，由以下代码表示：

@Component
public class ExampleBattery
{
    @Activate
    public void activate()
    {
        Thread t = new Thread(new Work());
        t.start();
    }

    private class Work implements Runnable
    {
        boolean continueLoop = true;

        @Override
        public void run() 
        {
            while (continueLoop)
            {
                System.out.println("hello");
                try 
                {
                    Thread.sleep(2500);
                } 
                catch (InterruptedException e) 
                {
                    continueLoop = false;
                }
            }
        }
    } 
}

它显然需要osgi.ee=JavaSE在它自己的清单中：

Manifest-Version: 1.0
Bnd-LastModified: 1448019954932
Bundle-ManifestVersion: 2
Bundle-Name: ExampleBattery.ExampleBattery
Bundle-SymbolicName: ExampleBattery.ExampleBattery
Bundle-Version: 1.0.0
Created-By: 1.8.0_66 (Oracle Corporation)
Private-Package: user.producer.battery
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=1.7))"
Service-Component: OSGI-INF/user.producer.battery.ExampleBattery.xml
Tool: Bnd-3.0.0.201509101326

下面的代码显示了我在Android应用程序中到底做了什么：

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    launchFramework();
}

private void launchFramework()
{
    // properties Map for the Felix instance
    Map<String, String> configMap = configMap = new HashMap<String, String>();

    // set some properties (like Felix's cache directory, etc.)
    configMap.put("felix.cache.rootdir", felixBaseDir);                 
    configMap.put("org.osgi.framework.storage", FELIX_CACHE_DIR_NAME);  
    try
    {
        // create and initialize the instance of the Framework
        this.felixInstance = new Felix(configMap);
        this.felixInstance.init();
        Log.i("Felix", "Framework successfully created and initialized");

        // simply use the Bundle context of the Felix 
        // instance to install ExampleBattery from the project's assets folder
        installBasicBundlesFromAssets();
        Log.i("Felix", "All basic Bundles installed successfully");

        // start the framework
        this.felixInstance.start();
        Log.i("Felix", "Framework successfully started");       
        //
        Log.i("Felix", "Starting installed Bundles ...");

        // simply call "start()" on all the installed Bundles
        if (startInstalledBundles())
        {
            Log.i("Felix", "ALL OK");
        }
    }
    catch (Exception ex)
    {
        Log.e("Felix", "Could not create framework: " + ex);
        return;
    }
}

它非常简单，但是当我尝试启动ExampleBattery包时，我得到了以下错误：

(&(osgi.ee=JavaSE)(version=1.7))]：03-29 05:29:29:44.942: E/Felix(8156)：无法启动捆绑" ExampleBattery.ExampleBattery "：org.osgi.framework.BundleException:无法解决ExampleBattery.ExampleBattery 1：缺失需求[ExampleBattery.ExampleBattery 1] osgi.ee；(&(osgi.ee=JavaSE)(version=1.7))未解决的要求：[[ExampleBattery.ExampleBattery 1] osgi.ee；ExampleBattery.ExampleBattery

这种情况非常奇怪，因为Felix默认使用其default.properties配置文件导出felix.jar中的

…… org.osgi.framework.system.capabilities=${eecap-${java.specification.version}} eecap-1.8= osgi.ee；osgi.ee=“OSGi/最小值”；version:List="1.0,1.1,1.2"，osgi.ee；osgi.ee="JavaSE"；osgi.ee=“JavaSE” version:List="1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7“eecap-1.7= osgi.ee；osgi.ee="OSGi/Minimum"；version:List="1.0,1.1,1.2"，osgi.ee；osgi.ee="JavaSE"；version:List=”1.0，1.1，1.2“ ……

我真的不知道发生了什么，感谢大家的回答。

Answer 1

我可以通过将以下属性设置为felix来解决这个问题：

configMap.put(Constants.FRAMEWORK_SYSTEMCAPABILITIES, "osgi.ee; osgi.ee=\"JavaSE\";version:List=\"1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8\"");