Hi,
In the sample, the component is implemented in java and the service is
introspected from the java class:
public class CalculatorServiceImpl implements CalculatorService {
...
@Reference
public void setAddService(AddService addService) {
this.addService = addService;
}
...
}
Can you add the following annotation to the class?
@Service(CalculatorService.class)
public class CalculatorServiceImpl implements CalculatorService {
...
}
It defines a service with CalculatorService as the interface and the name of
the service is the short name of the interface (i.e., CalculatorService).
Without the annotation, the service will be typed by CalculatorServiceImpl
and the name of the service will be CalculatorServiceImpl.
As a summary, you have two options:
1) Add the @Service to explicitly define the service
or
2) Change the promote to be
"CalculatorServiceComponent/CalculatorServiceImpl"
Thanks,
Raymond
----- Original Message -----
From: "Jason Clark" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, October 12, 2007 4:46 PM
Subject: RE: Promote?
That makes sense. Thanks for the reply. My follow-up question is regarding
the composite file in the user's guide on the Tuscany website regarding
the
calculator example.
In the file:
<composite xmlns="http://www.osoa.org/xmlns/sca/1.0";
name="Calculator">
<service name="CalculatorService"
promote="CalculatorServiceComponent/CalculatorService">
<interface.java interface="calculator.CalculatorService"/>
<binding.jsonrpc/>
</service>
<component name="CalculatorServiceComponent">
<implementation.java
class="calculator.CalculatorServiceImpl"/>
<reference name="addService" target="AddServiceComponent" />
</component>
<component name="AddServiceComponent">
<implementation.java class="calculator.AddServiceImpl"/>
</component>
</composite>
In this example, in the first service, they promote
CalculatorServiceComponent/CalculatorService, but when I run the project,
I
get the following error:
Promoted component service not found:
CalculatorServiceComponent/CalculatorService null
Am I missing something here? In the promote, I see it refers to the
CalculatorServiceComponent, but I don't see where the CalculatorService
comes from following that.
Also, am I correct is saying what it is trying to do is expose the
CalculatorServiceComponent as a Service on the Composite?
Thanks again.
-Jason
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-----Original Message-----
From: Raymond Feng [mailto:[EMAIL PROTECTED]
Sent: Friday, October 12, 2007 12:50 PM
To: [email protected]
Subject: Re: Promote?
Hi,
A SCA composite can be used as an implementation
(implementation.composite)
for a component. This is so-called recursive composition. It allows
pre-assembled composites to be reused.
"promote" can be used to make services or references declared on a
component
inside the composite visible for wiring at the composite level. The
composite services and references can be then further configured when it's
used as a component implementation at outer level.
Hope the following samples help.
<composite name="Composite1" xmlns:ns="http://dummy";>
<component name="C1">
<implementation.composite name="ns:Composite2">
<!-- wire ref1 to component C3's service1 -->
<reference name="ref1" target="C3/service1"/>
<!-- configure the service with ws binding -->
<service name="svc1">
<binding.ws .../>
</service>
</component>
</composite>
<composite name="Composite2" targetNamespace="http://dummy";
xmlns:ns="http://dummy";>
<component name="C2">
<implementation.java class="my.C2Impl">
</component>
<!-- innerService of component C2 is promoted as svc1 -->
<service name="svc1" promote="C2/innerService"/>
<!-- innerReference of component C2 is promoted as ref1 -->
<reference name="ref1" promote="C2/innerReference"/>
</composite>
Thanks,
Raymond
----- Original Message -----
From: "Jason Clark" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, October 12, 2007 2:21 PM
Subject: Promote?
Hello all. I am trying to understand what the promote keyword in the
composite file means? I've so far been able to find a definition of that,
and the composite file in general.
Thanks,
Jason
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