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From "Raymond Feng" <enjoyj...@gmail.com>
Subject Re: Fwd: Problem with "implementation.osgi" reference
Date Tue, 16 Jun 2009 16:33:46 GMT
Tuscany checks the OSGi bundle based on one of the following patterns:
* An "SCA-Composite" header in the MANIFEST.MF. It points to an SCA 
composite file within the bundle.
* Any files under OSGI-INF/sca.

In your case, the first bundle contains three java components. The second 
bundle contains one OSGi component.  There are a few options to get them 
work together (CalculatorService with a reference to TestService).

Option 1:
1) Place bundle.composite under OSGI-INF/sca in the calculator bundle. The 
composite contains 4 components: 3 java components and 1 OSGi component.
The @target for CalculatorService component's testService reference will be 

2) Place bundle.componentType under OSGI-INF/sca in the test service bundle.
Alternatively, you have place the file as 
OSGI-INF/sca/<bundleSymbolicName>/bundle.componentType in the calculator 

In this case, we are going to start one Node.

Option 2:
1) Place bundle.composite under OSGI-INF/sca in the calculator bundle. The 
composite contains 3 java components
2) Place bundle.composite under OSGI-INF/sca in the test service bundle. The 
composite contains 1 OSGi component.
3) Place bundle.componentType under OSGI-INF/sca in the test service bundle.

In this case, we are going to start two nodes. You can configure the 
CalculatorService.testService reference and the OSGi service to use the same 
binding (such as RMI, or WS) to communicate. Make sure the interface is 
remotable. binding.sca is not working yet.


From: santiago.aranda@telvent.com
Sent: Tuesday, June 16, 2009 1:33 AM
To: user@tuscany.apache.org
Subject: Re: Fwd: Problem with "implementation.osgi" reference

So, I have to attach two files (componentType and composite) to my two 
different bundles (TestService and Calculator) and model it as 
"implementation.osgi".   I have TestService in a bundle I will add these two 
file and I will design as "implementation.osgi" .

But Calculator Service (this is in other bundle) has three components and 
they are all "implementation.java" and it is working OK. How can I put a 
reference to TestService?? Do I need change "implementation.osgi" in 
CalculatorComponent instead "implementation.java"? and is it neccesary for 
AddServiceComponent and SubstractService??

I will try a example I will copy my files in the email.

Thank you very much

Un saludo.
Santiago Miguel Aranda Rojas
Telvent Interactiva
Extension: 35999
Telefono: 955637418

"Raymond Feng" <enjoyjava@gmail.com>
"Raymond Feng"
15/06/2009 18:36
Para: <user@tuscany.apache.org>, <santiago.aranda@telvent.com>
Asunto: Re: Fwd: Problem with "implementation.osgi" reference

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 doesn4t 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 doesn4t 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 don4t know if they are neccesary . 

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