user1737519 user1737519 - 7 months ago 18
Java Question

OSGi Declarative Service (ds) usage

Right now I try to implement the services of my OSGi-application as ds.

Unfortunately I can't figure out how to access consume the service.

My Service looks like this:

public interface IService {
public void foo(<T> bar);
}


public class ServiceImpl implemets IService {
public void foo( bar){
...
}
}


<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="iservice">
<implementation class="ServiceImpl"/>
<service>
<provide interface="IService"/>
</service>
</scr:component>


That's as far as I am right now.

But how can I access the service?


  1. I tried the following solution: http://it-republik.de/jaxenter/artikel/OSGi-in-kleinen-Dosen-Services-auf-deklarative-Weise-2340.html

    But eclipse won't find the import for

    ComponentContext
    h**p://www.osgi.org/javadoc/r4v42/org/osgi/service/component/ComponentContext.html

  2. I also found this solution: h**p://www.eclipsezone.com/eclipse/forums/t97690.rhtml

    But I'm a bit disappointed I'd have to wrap every single method and I'd have to use Eclipse specific apis

    There are the same problems with this solution: http://stackoverflow.com/a/11034485/1737519 although the example uses the apache felix api and not the Eclipse api.



All I want to do is access/reference the service like this:

Iservice s = ???;
s.foo(<T> bar);


Thx for your help in advance!

P.S. sry for masking the links, but I can't include more than 2!

Answer

Here's a way to consume your service. I have invented a fictional Billing component that needs to call your IService. Instead of using the XML I am using bnd annotations, which are much more convenient:

@Component
public class Billing {

    private IService service;

    @Reference
    public void setService(IService service) {
        this.service = service;
    }

    public void billCustomer() {
         // Do some stuff related to billing, whatever.

         // Blah blah blah

         // Now call the service, even though it wasn't real Java because
         // the <T> type parameter was unbound, but who cares...
         service.foo(bar);

         // Yay.
    }

}

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