OSGi Declarative Service (ds) usage

Question

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: https://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 1

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.
    }

}

Answer 2

it use the org.apache.felix.shell.Command , is the service will provide osgi console command, in org.apache.felix.shell.impl.Activator.ShellServiceImpl will get all services which implement org.apache.felix.shell.Command interface. so when user input a command name , the ShellServiceImpl will execute special service . Just let services customer know the interface , the interface is the contract between services provider and the services customer.

hope , it's usefull!