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WS-MessageDelivery ( w3/Submission/2004/SUBM-ws-messagedelivery-20040426/ )

WS-MessageDelivery ( http://www.w3.org/Submission/2004/SUBM-ws-messagedelivery-20040426/ ). Anish Karmarkar Jeff Mischkinsky Ashok Malhotra. Outline. Overview of WS-MessageDelivery Comparison of WS-MD and WS-A Summary. Overview of WS-MD. Web Service Reference (WSRef)

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WS-MessageDelivery ( w3/Submission/2004/SUBM-ws-messagedelivery-20040426/ )

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  1. WS-MessageDelivery(http://www.w3.org/Submission/2004/SUBM-ws-messagedelivery-20040426/)WS-MessageDelivery(http://www.w3.org/Submission/2004/SUBM-ws-messagedelivery-20040426/) Anish Karmarkar Jeff Mischkinsky Ashok Malhotra

  2. Outline • Overview of WS-MessageDelivery • Comparison of WS-MD and WS-A • Summary WS-MessageDelivery

  3. Overview of WS-MD • Web Service Reference (WSRef) • Abstract Message Delivery Properties (AMDP) • Mapping of AMDP to WSDL 1.1/2.0 MEPs • Composite MEPs • Callback pattern WS-MessageDelivery

  4. Overview of WS-MD (WSRef) • WSRef answers the questions: ‘where’, ‘what’ and ‘how’ • Where to send messages • What messages/operations can be sent / received /invoked • How to send the messages (transport/binding) • Reuses the syntax defined in WSDL 2.0/1.1 • Backports WSDL 2.0 service reference concepts to WSDL 1.1 WS-MessageDelivery

  5. Overview of WS-MD (AMDP) • AMDPs • Enables messages to be delivered to the right ‘place’ • Enables MEPs • Enables correlation of messages within an MEP • 7 AMDPs • wsmd:MessageOriginator • wsmd:MessageDestination • wsmd:ReplyDestination • wsmd:FaultDestination • wsmd:MessageID • wsmd:MessageReference • wsmd:OperationName WS-MessageDelivery

  6. Overview of WS-MD (Mappings/Callback) • Mapping of AMDPs to SOAP • Mapping of AMDPs to WSDL MEPs • 4 operations/message primitives in WSDL 1.1 • 7 MEPs in WSDL 2.0 • Callback Pattern • Composite MEP • Implements the WS-I Basic Callback Scenario (http://www.ws-i.org/SampleApplications/SupplyChainManagement/2003-12/UsageScenarios-1.01.pdf) • Correlates two in-out MEPs or two in MEPs WS-MessageDelivery

  7. Comparison of WSMD and WSA (similarities) • Similarities • Purpose • Both define a way to reference a Web service/endpoint • Both define MIH/AMDP to aid message delivery • 6 out 7 MIH/AMDP are isomorphic (sort of) WS-MessageDelivery

  8. Comparison of WSMD and WSA (MIH and AMDP) • MIH and AMDP • wsmd:MessageOriginator   wsa:From • wsmd:MessageDestination  wsa:To • wsmd:MessageID  wsa:MessageID • wsmd:MessageRef  wsa:RelatesTo • wsmd:ReplyDestination  wsa:ReplyTo • wsmd:FaultDestination  wsa:FaultTo • wsmd:OperationName  wsa:Action (sort of) WS-MessageDelivery

  9. Comparison of WSMD and WSA (EPR and WSRef) • EPR and WSRef • WS-Policy • Reference properties/parameters • Allows one to specify additional information that must be sent with a message • Reuse of existing syntactic structures (place of WSDL in the architecture) • wsa:Address – only item that is mandatory (need additional info before accessing a WS) • wsa:PortType/wsa:ServiceName -- optional WS-MessageDelivery

  10. Comparison of WSMD and WSA (faults/MEPs/Callback) • WS-A defines new WS-A specific faults • WS-MD specifies MEP mappings • WS-MD specifies how to implement Callbacks • Using two in-out MEPs • Using two in MEPs WS-MessageDelivery

  11. Summary • Substantially similarities in intent / usecases / requirements • MIH and AMDPs are analogous • Structure of EPR and WSRef have syntactic and functional differences but attempt to do similar things • MEP mappings absent in WS-A • Callback absent in WS-A • Faults absent in WS-MD WS-MessageDelivery

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