Re: The default service name is the same as the Java implementation class name

[Raymond Feng]

I assume you want some clarifications even though you didn't raise a 
question :-).

The behavior is defined by the SCA spec. There are a few cases to define an 
SCA service for the implementation class:

1) @Service is used to annotate the implementation class, then each 
interface in the value denotes an SCA service
2) If one or more interfaces implemented by the impl class have the 
@Remotable annotation, then those remotable interfaces denote SCA services
3) Default to the implementation class as the "interface" for the SCA 
service

The name of an SCA java service is the local name, in your case, 
DServiceImpl.

Thanks,
Raymond

From: kujunguo kujunguo
Sent: Wednesday, November 12, 2008 6:14 PM
To: dev@tuscany.apache.org
Subject: The default service name is the same as the Java implementation 
class name


If we don't define service in java implementation class or the componentType 
file, the default service is the same as implementation class.
for example, the java class is like:
public class DServiceImpl {
   public String sayHello() {
      return "Hello" ;
   }
}
The componentType is :
<componentType>
 <implementation.java class="com.ibm.was.sca.DServiceImpl"/>
</componentType>

The composite file is :
<composite>
   <component name="Component">
       <implementation.java class="com.ibm.was.sca.DServiceImpl"/>
   </component>

</composite>
You can pass the test with: DService service = 
ServiceFinder.getService(DService.class, "Component/DServiceImpl");
If you add a <service> in the composite file:
<composite>
   <component name="Component">
       <implementation.java class="com.ibm.was.sca.DServiceImpl"/>
       <service name="DService1">
          <interface.java interface="com.ibm.was.sca.DService"/>
       </service>
   </component>
</composite>
You can still get the service with the name "Component/DServiceImpl", but it 
will report a warning:
WARNING: Skipping component service not defined in the component type: 
Component#DService1
Then if you specify another name in the componentType:
<componentType>
 <implementation.java class="com.ibm.was.sca.DServiceImpl"/>
 <service name="DService1">
          <interface.java interface="com.ibm.was.sca.DService"/>
       </service>
</componentType>
Now the service name will be changed to DService1, so you will not get the 
service by "Component/DServiceImpl". You have to use DService1 instead.
If you change the name in composite file from DService1 to DService2, you 
can still get the service with name "Component/DService1" but with a 
warning:
WARNING: Skipping component service not defined in the component type: 
Component#DService2
Now change the DService2 to DServiceImpl in composite file, there will be no 
warning, all can pass.
So DServiceImpl is a specical name, a default name.