Introducing WCF Duplex services
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This document discusses Windows Communication Foundation (WCF) basics including message exchange patterns like duplex messaging. Duplex messaging allows both the client and server to exchange messages through the use of a callback contract and the wsDualHttpBinding binding. It provides advantages over alternatives by supporting protocols besides HTTP, hosting outside a web server, and enabling transactions and reliable sessions. The document also covers WCF runtime architecture, endpoints, address, binding and contract, and provides examples of one-way, request-reply, and duplex services.
Introducing WCF Duplex services
- 2. • • • • WCF Basics Message Exchange Patterns Duplex Message Exchange Advantages of Duplex Messaging
- 3. • WCF Provide runtime environment for Services Message Client Service Message
- 4. • Advantages over other alternatives – Support protocols other than http – Host in other than web server – Transactions and reliable sessions – Message formats other than SOAP
- 5. • Endpoints Service Client 1 End point 1 End point 2 Message End point 1 Client 2 Message End point 2
- 6. • ABC of WCF • Address – Where ? • Binding – How? • Contract – What?
- 7. • Channel
- 8. • WCF runtime architecture
- 11. • One-Way
- 13. • Duplex
- 14. • Both client and server can exchange messages • Use callback contract to call to client • Use “wsDualHttpBinding” binding
- 16. • Alternative for client polling • Enhanced performance • Integration with Silverlight
- 17. WCF Chat
- 18. Q&A
- 19. Thank You !
Editor's Notes
- #4: System.ServiceModel namespaceUsing message passingHistory – COM , DCOM, .NetRemorting, ASMX Web Services
- #6: Clients consume the service using endpoints
- #8: Bindings will govern the behavior of channel like security, transactions, protocols, encoding etc..There are 2 types of channels. Transport channels and protocol channels