Re: Use EmbeddedScaDomain to deploy multiple contributions

[Raymond Feng]

Hi,

The wire element has some errors:
 <wire  source=”HelloComponent/Store"
            Target="/StoreServiceComponent /StoreService"/>

should be:

 <wire  source=”HelloComponent/Store"
           target="StoreServiceComponent /StoreService"/>

Thanks,
Raymond

From: Dong Liu
Sent: Tuesday, March 31, 2009 12:43 PM
To: user@tuscany.apache.org
Subject: Use EmbeddedScaDomain to deploy multiple contributions


I tried to use Tuscany EmbeddedScaDomain to deploy multiple contributions 
which can share some common resources. Here are my contributions:

Contribution A (http://inner) contains InnerComposite, looks like:

<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"; 
targetNamespace="http://inner";
  name="InnerComposite">
 <component name="StoreServiceComponent">
       <implementation.java class="store.StoreServiceImpl"/>
       <service name="StroreService">
                       <binding.sca uri="/StoreServiceComponent 
/StoreService"/>
      </service>
  </component>
</composite>

Contribution B(http://outer) contains OuterComposite, looks like:

<composite xmlns="http://www.osoa.org/xmlns/sca/1.0";
   targetNamespace="http://hello";  xmlns:inner="http://inner";
   name="OuterComposite">

  <!--
    <include name="inner:InnerComposite"/>
   -->
  <component name="HelloComponent">
       <implementation.java class="hello.HelloImpl"/>
       <reference name=”Store”/>
    </component>
 <wire  source=”HelloComponent/Store"
            Target="/StoreServiceComponent /StoreService"/>
</composite>

Both composites are declared as deployable. Contribution A is exported to 
namespace http://inner and contribution B imports it.

The “Store” service is implemented using “COMPOSITE” Scope annotation, which 
is intend to provide a shareable store instance for other contributions such 
like B.

However, I got a warning message when deploying B after contribution A is 
deployed successfully. The warning message is “Wire target not found : 
HelloComponent/Store”. It looks like the wire in one composite can’t link to 
components belongs to other composites.

I can make contribution B deployed only by adding the “include” declaration. 
But I am not sure this will meet my requirement because now the "Store" 
service belongs to two composites.  The instance shouldn’t be shared among 
multiple composites since its scope is “COMPOSITE”.

If there are other solutions for this problem?


Thanks

Dong