Hi, If you had also read the SCA Policy spec you would see that it contains an algorithm in section 4.10 that describes how intents can be mapped to policySets at deployment time. This alleviates the need to attach the conversation policySet to the binding explicitly. The algorithm will see the conversation intent in the interface, look for a policySet that provides the intent (notice the provides attribute in the policySet definition) and then automatically and logically attach a policySet that will do the job. I cannot comment on how much of this has been implemented by Tuscany, I've just lost track of it. Luciano might be able to comment.
The SCA specs come as a group and you have to be somewhat familiar with them all in order to get a complete picture. The Assembly spec is the one that describes attachment of intents directly into WSDL interface definitions. Dave Booz ----- Original Message ----- From: Sun Yang To: [email protected] Sent: Saturday, July 05, 2008 1:29 AM Subject: Tuscany policy implementation 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
