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From "Raymond Feng" <enjoyj...@gmail.com>
Subject Re: Fwd: Problem with "implementation.osgi" reference
Date Mon, 15 Jun 2009 16:36:22 GMT
To access an OSGi service from the SCA component, you will have to provide 
SCA configurations for the OSGi bundle so that it becomes an SCA component 
using implementation.osgi and the OSGi service becomes an SCA service so 
that the Calculator component can wire to that TestService.

There are two SCA files you to provide to model the OSGi bundle as an SCA 
* bundle.componentType to describe what OSGi services or references are used 
in the bundle (We potentially have better approach to introspect the OSGi 
bundle to build this up)
* bundle.composite to configure the component, for example, setting the 

These files can be in a separate OSGi bundle than the one that owns the 


From: Santiago Miguel Aranda Rojas
Sent: Monday, June 15, 2009 4:01 AM
To: user@tuscany.apache.org
Subject: Fwd: Problem with "implementation.osgi" reference


I can not understand this sample because there are many new concepts for me. 
For example "bundle.componentType". There is not too much information about 
that . I think I need something more simple. I have attached a picture with 
my idea.

** When my SCA service was working I had a main component 
"implementacion.java" with two references to another two components 
(implementation.java). The main component could be invoked as Web Service.

** Now, I want another reference to a Service (TestService in the picture) 
that was registered by another different bundle. But this is a OSGi bundle, 
without SCA information, Composite file nor ComponentType file. I mean it is 
a bundle that is registering a service in the OSGi registry. I need have a 
instance wired to this OSGi service in the class of the main Component in 
order to invoke their methods.

TestService testService;

//I need testService is not null in order to invoke their methods.

I hope you can understand my problem. You can ask me if you want.

Thank you very mucha

2009/6/10 Raymond Feng <enjoyjava@gmail.com>

Please see:




From: Santiago Miguel Aranda Rojas
Sent: Wednesday, June 10, 2009 12:07 AM
To: user@tuscany.apache.org
Subject: Re: Problem with "implementation.osgi" reference

Yes, you are right. I was doing some different tests and I copied you a 
wrong composite. I wanted to see if the change of @target made an error in 
tuscany.  But Tuscany doesn´t recognize this error because I think it 
supposes that will be a "remote Component". I can see this in the tuscany 

ADVERTENCIA: Component reference target not found, it might be a remote 
service running elsewhere in the SCA Domain: Composite = 

Service = PruebaComponent

But it is Ok, because the component I want if an Osgi Service registered in 
the Osgi registry.
I have fixed the error in @target and it is not working yet.

Do you know any example when an <implementation.osgi> component is used?

I have tried to change  "xmlns" tag, but it doesn´t work.

  <sca:component name="PruebaComponent">
            <sca:properties service="prueba.PruebaImpl">

Thank you very much.

2009/6/10 Raymond Feng <enjoyjava@gmail.com>

The @target is pointing to a wrong componentName/serviceName. It should be 
"Prueba" instead of "PruebaComponent" as the component name is "Prueba".

From: Santiago Miguel Aranda Rojas
Sent: Tuesday, June 09, 2009 1:28 PM
To: user@tuscany.apache.org
Subject: Re: Problem with "implementation.osgi" reference

Tuscany 2.02M. The last version I think. April 2009
----- Original Message ----- 
From: Raymond Feng
To: user@tuscany.apache.org
Sent: Tuesday, June 09, 2009 7:12 PM
Subject: Re: Problem with "implementation.osgi" reference

Are you using Tuscany/SCA 2.x or 1.x?

From: santiago.aranda@telvent.com
Sent: Tuesday, June 09, 2009 9:15 AM
To: user@tuscany.apache.org
Subject: Problem with "implementation.osgi" reference


I want to use an osgi service as a SCA component. But I can not access to 
their methods from other Component.  I mean I have created a wired instance 
to the Osgi Service ($Proxy25). It is not "null" but I can not invoke to one 
method because an error is happening

--->Unable to create SCA binding invoker for local target 
SensorNetworkManagementComponent reference prueba (bindingURI=null 

This is my composite file. I want to have to two components. The first had a 
reference to the second and it is normal "implementation.java". The second 
is the SCA component that is representing to the Osgi Service that I want to 
recover. This Osgi Service was registered in the Osgi registry by Activator 
class in "RegistroService" bundle.

 <sca:component name="SensorNetworkManagementComponent">
    <sca:service name="SensorNetworkManagementService">
  <sca:reference name="prueba" target="PruebaComponent"/>

  <sca:component name="Prueba">
            <sca:properties service="prueba.PruebaImpl">

***The Java code--> The first component.

public class SensorNetworkManagementServiceImpl  implements 
SensorNetworkManagementService {
private Prueba prueba;
public Prueba getPrueba() {
return prueba;
public void setPrueba(Prueba prueba) {
this.prueba = prueba;

**Java code       --> The second component. It is another bundle that is 
registering one simple Osgi Service. The interface was

public interface Prueba {
public abstract String sayHello();


This instance (prueba) is not null when an outside client invoke to the 
first component. But if I invoke to one method of this interface, for 
example "prueba.sayHello" I obtained the previous error.

I have read something about anottations like @AllowsPassByReference or 
@Scope, but I don´t know if they are neccesary . 

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