[Spec related] @Requires on interfaces specified in component services, was: requires and policySets attribute support

[Jean-Sebastien Delfino <js...@apache.org>]

[snip]
Jean-Sebastien Delfino wrote:
>
> You'll need to handle both interfaces and implementation classes, 
> which both can have @Requires. I would expect @Requires on a Java 
> implementation class and its interfaces to translate to Intent 
> metadata in the ComponentType model describing the implementation.
>
> A Java interface can also be specified in a service or reference for a 
> particular component (independent of the implementation class and the 
> interfaces it implements). You may have to handle that too and 
> translate @Requires to Intent metadata in the Component model 
> describing the particular component (somehow refining the Intents 
> specified on the implementation). This is something to investigate as 
> I couldn't find a clear description of the behavior in this case in 
> the SCA Java C&I spec.
>
> Let us know if you run into any issues or questions.
>

Could anyone working on this particular aspect of the policy and Java 
C&I spec help shed some light on the use case I outlined above? What 
happens if I do the following:

<component name="CustomerInfoComponent">
  <service name="CustomerInfoService">
    <interface.java interface="CustomerInfo"/>
  </service>
  <implementation.java class="CustomerInfoImpl"/>
</component>

@Requires(CONFIDENTIALITY.MESSAGE)
interface CustomerInfo {
  ... retrieveCustomer(...);
}

class CustomerInfoImpl implements CustomerInfo {
  ... retrieveCustomer(...);
}

Does this make the confidentiality/message policy intent effective for 
service CustomerInfoService or not?

Thanks

-- 
Jean-Sebastien


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Re: [Spec related] @Requires on interfaces specified in component services, was: requires and policySets attribute support

[scabooz <sc...@gmail.com>]

Hi Sebastien,

I don't see any other replies, and I feel like I'm being tricked in
some way....

First, let me say that this could be more clearly described. However,
there is a precedent in the WSDL extension for @requires. It is
described in section 1.5.4 of the assembly spec.  When applied to
this case, you get:

Use of the @requires annotation in this example is the same as:

<service name="CustomerInfoService" requires="confidentiality.message">
   <interface.java interface="CustomerInfo"/>
</service>

So the answer is yes.

Dave


----- Original Message ----- 
From: "Jean-Sebastien Delfino" <js...@apache.org>
To: <tu...@ws.apache.org>
Sent: Thursday, March 15, 2007 2:44 AM
Subject: [Spec related] @Requires on interfaces specified in component 
services, was: requires and policySets attribute support


> [snip]
> Jean-Sebastien Delfino wrote:
>>
>> You'll need to handle both interfaces and implementation classes, which 
>> both can have @Requires. I would expect @Requires on a Java 
>> implementation class and its interfaces to translate to Intent metadata 
>> in the ComponentType model describing the implementation.
>>
>> A Java interface can also be specified in a service or reference for a 
>> particular component (independent of the implementation class and the 
>> interfaces it implements). You may have to handle that too and translate 
>> @Requires to Intent metadata in the Component model describing the 
>> particular component (somehow refining the Intents specified on the 
>> implementation). This is something to investigate as I couldn't find a 
>> clear description of the behavior in this case in the SCA Java C&I spec.
>>
>> Let us know if you run into any issues or questions.
>>
>
> Could anyone working on this particular aspect of the policy and Java C&I 
> spec help shed some light on the use case I outlined above? What happens 
> if I do the following:
>
> <component name="CustomerInfoComponent">
>  <service name="CustomerInfoService">
>    <interface.java interface="CustomerInfo"/>
>  </service>
>  <implementation.java class="CustomerInfoImpl"/>
> </component>
>
> @Requires(CONFIDENTIALITY.MESSAGE)
> interface CustomerInfo {
>  ... retrieveCustomer(...);
> }
>
> class CustomerInfoImpl implements CustomerInfo {
>  ... retrieveCustomer(...);
> }
>
> Does this make the confidentiality/message policy intent effective for 
> service CustomerInfoService or not?
>
> Thanks
>
> -- 
> Jean-Sebastien
>
>
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> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
> 


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