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

[kujunguo kujunguo]

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.