Routing with WCF

Here is sample code for routing with WCF.

WCFRoutingServiceTest.zip

Web.config for service

<?xml version="1.0"?>

<!--

  For more information on how to configure your ASP.NET application, please visit

  http://go.microsoft.com/fwlink/?LinkId=169433

  -->

<configuration>

  <system.web>

    <compilation debug="true" targetFramework="4.0" >

      <assemblies>

        <add assembly="System.ServiceModel.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

      </assemblies>

    </compilation>

  </system.web>

  <system.serviceModel>

    <serviceHostingEnvironment multipleSiteBindingsEnabled="true">

      <serviceActivations>

        <add relativeAddress="RiskManagementServiceUAT.svc" service="System.ServiceModel.Routing.RoutingService, System.ServiceModel.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

      </serviceActivations>

    </serviceHostingEnvironment>

    <services>

      <!--ROUTING SERVICE -->

      <service name="System.ServiceModel.Routing.RoutingService" behaviorConfiguration="routerConfig">

        <endpoint address=""

                  binding="basicHttpBinding"

                  contract="System.ServiceModel.Routing.IRequestReplyRouter"

                  name="reqReplyEndpoint" />

      </service>

    </services>

    <routing>

      <filters>

        <filter name="matchAll" filterType="MatchAll" />

      </filters>

      <filterTables>

        <filterTable name="routingTable">

          <add filterName="matchAll" endpointName="RiskService" backupList="RiskServiceBackup" />

        </filterTable>

      </filterTables>

      <backupLists>

        <backupList name="RiskServiceBackup">

          <add endpointName="RiskService2"/>

        </backupList>

      </backupLists>

    </routing>

    <behaviors>

      <serviceBehaviors>

        <behavior name="routerConfig">

          <serviceMetadata httpGetEnabled="true" />

          <serviceDebug includeExceptionDetailInFaults="true" />

          <routing routeOnHeadersOnly="false" filterTableName="routingTable" />

        </behavior>

      </serviceBehaviors>

    </behaviors>

    <client>

      <!-- Define the client endpoint(s) to route messages to -->

      <endpoint name="RiskService"

            address="http://localhost:81/Service1.svc"

            binding="basicHttpBinding"

            contract="*" />

      <endpoint name="RiskService2"

            address="http://localhost:82/Service1.svc"

            binding="basicHttpBinding"

            contract="*" />

    </client>

  </system.serviceModel>

  <system.webServer>

    <modules runAllManagedModulesForAllRequests="true"/>

  </system.webServer>

</configuration>

client.config for silverlight client

<configuration>

    <system.serviceModel>

        <bindings>

            <basicHttpBinding>

                <binding name="BasicHttpBinding_IService1" maxBufferSize="2147483647"

                    maxReceivedMessageSize="2147483647">

                    <security mode="None" />

                </binding>

            </basicHttpBinding>

        </bindings>

        <client>

            <endpoint address="http://localhost/RiskManagementServiceUAT.svc" binding="basicHttpBinding"

                bindingConfiguration="BasicHttpBinding_IService1" contract="ServiceReference1.IService1"

                name="BasicHttpBinding_IService1" />

        </client>

    </system.serviceModel>

</configuration> 

* I updated source to make someone to understand better.

WCFRoutingServiceTest_updated.zip

* Address filter decides where to go using client's ip address. Like the sticky session under L4 load balancer, address filter ensures client to be directed to same was.

WCFRoutingServiceTest_addressfilter.zip

References:

• http://www.javierholguera.com/2012/07/18/routing-with-wcf/
• http://www.codeproject.com/Articles/423064/Getting-Started-with-WCF-Routing-Service
• http://www.codeproject.com/Articles/778575/WCF-Routing-Service-Part-III-Failover-Load-Balanci