WCF 4 includes exciting improvements like simplified configuration, discovery, routing services and web HTTP programming. In this session we will explore those features and many more goodies that WCF 4 has to offer, and learn how to design and use the enhanced WCF 4 infrastructure.

1. What’s New in WCF 4.0
Eyal Vardi
CEO E4D Solutions LTD
Microsoft MVP Visual C#
blog: www.eVardi.com

2. Agenda
• Simplified Configuration
• Discovery
• Routing Services

3. Simplified Configuration

4. Simplified Configuration

5. Kind Attribute
• Set the type of the standard endpoint
<service name="HelloService">
...
<endpoint binding="webHttpBinding" contract= "IService1"
kind= "webHttpEndpoint" />
<endpoint kind="mexEndpoint" /> No need in
<endpoint kind="webHttpEndpoint" /> bindingConfiguration
</service> endpointConfiguration

6. Custom Standard Endpoint
• Standard endpoint must be registered in the
<endpointExtensions> section.
<system.serviceModel>
<service name="HelloService">
<endpoint kind= "udpDiscoveryEndpoint" />
</service>
<extensions>
<endpointExtensions>
<add name="udpDiscoveryEndpoint" type="..." />
</endpointExtensions>
</extensions>
</system.serviceModel>

7. Standard Endpoint

8. Service Discovery

9. Why We Need Discovery?

10. Async WCF Services

11. WS – Discovery
Service Opened
Hello Target
Client
Service
Target
Client
Service
Target
Client
Service

12. WS – Discovery
Client Look for Service
Probe Target
Client
Service
Target
Client
Service
Target
Client
Service

13. WS – Discovery
Service Return Match Message
Probe Match Target
Client
Service
Target
Client
Service
Target
Client
Service

14. WS – Discovery
Service Closed
By Target
Client
Service
Target
Client
Service
Target
Client
Service

15. Basic Discovery

16. Discovery Announcements

17. Routing Services

18. Router Service Architecture
Client
Router Filter
Filters
Service Tables
Server A
Service A Service B Service C
Server B Server C

19. Router Endpoints & Contracts
<service name ="System.ServiceModel.Routing.RoutingService">
<endpoint name = "reqReplyEndpoint"
address = ""
binding = "basicHttpBinding"
contract = "System.ServiceModel.Routing.IRequestReplyRouter"
/>
</service>

20. Configuring Filters
• The RouterService evaluates filters to determine
how to forward the message.
<serviceBehaviors>
<behavior>
<routing filterTableName="MyRoutingTable" />
<routing>
</behavior>
<filters>
</serviceBehaviors>
<filter name="MatchAllFilter1" filterType="MatchAll" />
</filters>
<filterTables>
<filterTable name="MyroutingTable">
<add filterName="MatchAllFilter1"
endpointName="CalculatorService" />
</filterTable>
</filterTables>
<client>
</routing>
<endpoint name="CalculatorService"
address="http://..."
binding="basicHtttpBinding"
contract="*" >
</client>

21. Routing Services

22. Error Handing
• You can define different lists of alternate endpoints that will be
used if communicating with the initial target endpoint results in
an error.
<routing>
...
<filterTable name="MyroutingTable">
<add filterName ="f1"
endpointName ="t1"
backupList ="altEndpoints" />
</filterTable>
...
<backupLists>
<backupList name="altEndpoints">
<add endpointName="CalculatorService2"/>
</backupList>
</backupLists>
</routing>

23. Multicast Routing Behavior
• Supports automatically routing a particular
incoming message to multiple destinations in a
“multicast” fashion.
<routing>
<filters>
<filter name="Filter1" filterType="MatchAll" />
</filters>
<filterTables> “Multicast”
<filterTable name="MyroutingTable">
<add filterName="Filter1" endpointName="Target1" />
<add filterName="Filter1" endpointName="Target2" />
<add filterName="Filter1" endpointName="Target3" />
</filterTable>
</filterTables>
</routing>

25. Summary
• Simplified Configuration
• Discovery
• Routing Services

26. Resources
• http://blogs.microsoft.co.il/blogs/vardi/
• A Developer’s Introduction to WCF 4 Beta 1
• Service Configuration Improvements in .NET 4
• What’s New in WCF 4.0?
• Jesus Rodriguez's WebLog