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Posted to user@tuscany.apache.org by Gary Brown <ga...@pi4tech.com> on 2011/05/30 13:32:40 UTC

Issue with binding on service element that promotes a component?

Hi

I have been experimenting with adding a binding, using the example
supplied with tuscany 2.0.Beta2. All works fine when the binding is
contained in a service element within the component, however when I
try to add an external service element to promote the component, and
move the binding to that external service element, it appears to be
ignored.

<composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"

	       xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.1"

           targetNamespace="http://itest"

           name="HelloWorldComposite">


    <service name="HelloWorldService" promote="HelloWorldComponent" >

        <tuscany:binding.sample someAttr="bla" />

    </service>


    <component name="HelloWorldComponent">

        <implementation.java class="helloworld.HelloWorldImpl"/>

        <service name="HelloWorldService" />
    </component>



    <component name="HelloWorldClient">

        <implementation.java class="helloworld.HelloWorldClient"/>

        <reference name="ref" >

            <tuscany:binding.sample
uri="HelloWorldComponent/HelloWorldService"/>

        </reference>

    </component>



</composite>


Found a similar problem mentioned here:
http://www.mail-archive.com/user@tuscany.apache.org/msg01994.html

Interestingly the reference binding provider is also not instantiated,
so wondering whether this sample binding is only intended for use
within a composite - i.e. because there is no service defined with the
binding type, the reference is ignored? If so, possibly this is the
underlying reason that the binding cannot be used for the external
service? If so, what needs to be added to the binding to make it
usable for external services?

Not sure if this is a known issue, or whether I have something wrong
with my binding, as there does not appear to be any examples in the
2.0.Beta2 distribution that uses a binding (e.g. binding.ws) in an
external service element?

Regards
Gary

Re: Issue with binding on service element that promotes a component?

Posted by Gary Brown <ga...@pi4tech.com>.

Thanks for the clarification.

Regards
Gary

On Mon, May 30, 2011 at 1:31 PM, Simon Nash <na...@apache.org> wrote:
> Gary Brown wrote:
>>
>> Hi
>>
>> I have been experimenting with adding a binding, using the example
>> supplied with tuscany 2.0.Beta2. All works fine when the binding is
>> contained in a service element within the component, however when I
>> try to add an external service element to promote the component, and
>> move the binding to that external service element, it appears to be
>> ignored.
>>
>> <composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
>>
>>               xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.1"
>>
>>           targetNamespace="http://itest"
>>
>>           name="HelloWorldComposite">
>>
>>
>>    <service name="HelloWorldService" promote="HelloWorldComponent" >
>>
>>        <tuscany:binding.sample someAttr="bla" />
>>
>>    </service>
>>
>>
>>    <component name="HelloWorldComponent">
>>
>>        <implementation.java class="helloworld.HelloWorldImpl"/>
>>
>>        <service name="HelloWorldService" />
>>    </component>
>>
>>
>>
>>    <component name="HelloWorldClient">
>>
>>        <implementation.java class="helloworld.HelloWorldClient"/>
>>
>>        <reference name="ref" >
>>
>>            <tuscany:binding.sample
>> uri="HelloWorldComponent/HelloWorldService"/>
>>
>>        </reference>
>>
>>    </component>
>>
>>
>>
>> </composite>
>>
>>
>> Found a similar problem mentioned here:
>> http://www.mail-archive.com/user@tuscany.apache.org/msg01994.html
>>
>> Interestingly the reference binding provider is also not instantiated,
>> so wondering whether this sample binding is only intended for use
>> within a composite - i.e. because there is no service defined with the
>> binding type, the reference is ignored? If so, possibly this is the
>> underlying reason that the binding cannot be used for the external
>> service? If so, what needs to be added to the binding to make it
>> usable for external services?
>>
>> Not sure if this is a known issue, or whether I have something wrong
>> with my binding, as there does not appear to be any examples in the
>> 2.0.Beta2 distribution that uses a binding (e.g. binding.ws) in an
>> external service element?
>>
>> Regards
>> Gary
>>
>>
> Hi Gary,
> This promoted service configuration approach works in Tuscany 1.x,
> which implements the SCA 1.0 spec.
>
> The SCA 1.1 spec was clarified by the OASIS TC to say that any
> promoted service configuration must be ignored for a top-level
> composite deployed into the domain.  Tuscany 2.0 complies with
> the SCA 1.1 spec, so this implementation was changed accordingly.
>
> For Tuscany 2.0 you'll need to put the binding configuration on
> the component service.  This also works on Tuscany 1.x.
>
>  Simon
>
>

Re: Issue with binding on service element that promotes a component?

Posted by Simon Nash <na...@apache.org>.

Gary Brown wrote:
> Hi
> 
> I have been experimenting with adding a binding, using the example
> supplied with tuscany 2.0.Beta2. All works fine when the binding is
> contained in a service element within the component, however when I
> try to add an external service element to promote the component, and
> move the binding to that external service element, it appears to be
> ignored.
> 
> <composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"
> 
> 	       xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.1"
> 
>            targetNamespace="http://itest"
> 
>            name="HelloWorldComposite">
> 
> 
>     <service name="HelloWorldService" promote="HelloWorldComponent" >
> 
>         <tuscany:binding.sample someAttr="bla" />
> 
>     </service>
> 
> 
>     <component name="HelloWorldComponent">
> 
>         <implementation.java class="helloworld.HelloWorldImpl"/>
> 
>         <service name="HelloWorldService" />
>     </component>
> 
> 
> 
>     <component name="HelloWorldClient">
> 
>         <implementation.java class="helloworld.HelloWorldClient"/>
> 
>         <reference name="ref" >
> 
>             <tuscany:binding.sample
> uri="HelloWorldComponent/HelloWorldService"/>
> 
>         </reference>
> 
>     </component>
> 
> 
> 
> </composite>
> 
> 
> Found a similar problem mentioned here:
> http://www.mail-archive.com/user@tuscany.apache.org/msg01994.html
> 
> Interestingly the reference binding provider is also not instantiated,
> so wondering whether this sample binding is only intended for use
> within a composite - i.e. because there is no service defined with the
> binding type, the reference is ignored? If so, possibly this is the
> underlying reason that the binding cannot be used for the external
> service? If so, what needs to be added to the binding to make it
> usable for external services?
> 
> Not sure if this is a known issue, or whether I have something wrong
> with my binding, as there does not appear to be any examples in the
> 2.0.Beta2 distribution that uses a binding (e.g. binding.ws) in an
> external service element?
> 
> Regards
> Gary
> 
> 
Hi Gary,
This promoted service configuration approach works in Tuscany 1.x,
which implements the SCA 1.0 spec.

The SCA 1.1 spec was clarified by the OASIS TC to say that any
promoted service configuration must be ignored for a top-level
composite deployed into the domain.  Tuscany 2.0 complies with
the SCA 1.1 spec, so this implementation was changed accordingly.

For Tuscany 2.0 you'll need to put the binding configuration on
the component service.  This also works on Tuscany 1.x.

   Simon