Operation Overloading and multiple @Remotable interfaces on one Component - presuming this is allowed.

["Mark Combellack" <mcombellack@avaya.com>]

Hi,

 

I have a question about operation overloading when a Component implements multiple @Remotable interfaces.

 

I know that on a single @Remotable interface, I cannot use operation overloading. The Assembly specification disallows this:

 

http://www.oasis-open.org/apps/org/workgroup/sca-assembly/download.php/27619/sca-assembly-1.1-spec-WD-03.pdf

 

2264        The style of remotable interfaces is typically coarse grained and intended for loosely coupled

2265        interactions. Remotable service Interfaces MUST NOT make use of method or operation

2266        overloading.

 

As a result, I cannot do the following:

 

@Remotable

public interface TimeService {

    Date getCurrentTime();

    Date getCurrentTime(String timeZone);

}

 

 

However, is it valid for a Component to implement multiple @Remotable interfaces that have operations with the same name but different parameters? Each @Remotable interface does not have operation overloading but the resulting Component does.

 

I’ll give you a Java example.

 

I have two @Remotable services as defined by the following Java interfaces:

 

@Remotable

public interface LocalTimeService {

    Date getCurrentTime();

}

 

@Remotable

public interface WorldTimeService {

    Date getCurrentTime(String timeZone);

}

 

 

I have a single Java Component that implements both of these @Remotable Interfaces:

 

@Service(interfaces = {LocalTimeService.class, WorldTimeService.class})

public void class TimeServiceImpl implements LocalTimeService, WorldTimeService {

 

    public Date getCurrentTime() {

        // Code not shown

    }

 

    public Date getCurrentTime(String timeZone) {

        // Code not shown

    }

}

 

 

It can be seen that the Java Implementation of the Component does have operation overloading but I am presuming that this is allowed since each @Remotable interface exposed by the Component does not use operation overloading.

 

Thanks,

 

Mark