通过org.osgi.service.component注释的抽象组件

Question

我正在从org.apache.felix.scr注释迁移到org.osgi.service.component注释。我有一组从一个共同的抽象类继承的组件。在felix的情况下，我可以在超类中使用@Component注释和componentAbstract=true选项，然后在超类中使用@Reference注释。我找不到如何将其迁移到osgi注释。

是否有可能在Component的超类中使用Component注释？如果是这样，那么处理属性和元类型生成的适当方式是什么？

所以，我找的，是这样的

/* No component definition should be generated for the parent, as it is 
    abstract and cannot be instantiated */ 
@Component(property="parent.property=parentValue") 
public abstract class Parent { 
    @Reference 
    protected Service aService; 

    protected activate(Map<String,Object> props) { 
    System.out.println("I have my parent property: "+props.get("parent.property")); 

    @Override 
    public abstract void doSomething(); 
} 

/* For this class, the proper Component definition should be generated, also 
    including the information coming from the annotations in the parent */ 
@Component(property="child.property=childValue") 
public class Child extends Parent { 

    @Activate 
    public activate(Map<String,Object> props) { 
    super.activate(props); 
    System.out.println("I have my child property: "+props.get("child.property")); 
    } 

    public void doSomething() { 
    aService.doSomething(); 
    } 
} 

Answer 1

默认情况下BND在父类不会处理DS注释。你可以用-dsannotations-options: inherit来改变它，但请参阅http://enroute.osgi.org/faq/ds-inheritance.html为什么你不应该这样做！