Tuscany policy implementation

[Sun Yang]

Hi,

I am confused with the policy intent regards to sca:conversation between
specs (SCA assembly and SCA web services binding). I use a few days looking
at the specs, examples and src code, but I cannot get an answer by myself.
Pls advise me.

1. In SCA assembly spec, it suggests to use
sca:requires="sca:conversational" at the wsdl porttype. (Line 883-Line 925)
2. In SCA web services binding spec, the example policyset applies to
binding.ws as below:
<policySet name="WSRM-Sequence-based-conversation"
provides="sca:conversation" appliesTo="sca:binding.ws">
 <wsp:Policy>
   <wsrmp:RMAssertion xmlns:wsrmp="
http://docs.oasis-open.org/ws-rx/wsrmp/200608"/>
 </wsp:Policy>
</policySet>

Does it mean we need to declare the WS-RM based conversation at two places
simultaneously?
1. composite file: (at the ws.bind tag since the example policy only applies
to binding.ws)
    for example:
    <binding.ws uri="http://localhost:8085/HelloWorldService"; *
sca:policySets="tuscany:conversation"*/>
    when we declare the definitions.xml like the following:
*    <sca:definitions xmlns="http://www.osoa.org/xmlns/sca/1.0";
             targetNamespace="http://tuscany.apache.org/xmlns/sca/1.0";
             xmlns:sca="http://www.osoa.org/xmlns/sca/1.0";
             xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.0";
             xmlns:wsp="http://www.w3.org/2006/07/ws-policy";>

    <sca:policySet name="WSRM-Sequence-based-conversation"
        provides="sca:conversation"
        appliesTo="sca:binding.ws">
        <wsp:Policy>
            <wsrmp:RMAssertion
                xmlns:wsrmp="http://docs.oasis-open.org/ws-rx/wsrmp/200608
"/>
            </wsp:Policy>
    </sca:policySet>
   </sca:definitions>*

2. wsdl file: (at the port type)
        <wsdl:portType name="HelloWorld" *sca:requires="sca:conversational"*
>
        <wsdl:operation name="getGreetings">
            <wsdl:input message="tns:getGreetingsRequest"
name="getGreetingsRequest"/>
            <wsdl:output message="tns:getGreetingsResponse"
name="getGreetingsResponse"/>
        </wsdl:operation>
        <wsdl:operation name="bye" *sca:endsConversation="true"*>
            <wsdl:input message="tns:byeRequest" name="byeRequest"/>
            <wsdl:output message="tns:byeResponse" name="byeResponse"/>
        </wsdl:operation>
    </wsdl:portType>

And another question I have is whether we should look at the*
*"sca:conversational"
literally at the wsdl porttype tag? I cannot find any reference to apply the
policy to wsdl file in the policy framework spec. How to define an
applicable tuscany policy which will apply to wsdl file?

Best Regards,
Yang Sun