what are the default service behaviors on ServiceModel.Routing?

Question

What are the default service behaviors on ServiceModel.Routing?

I'm not talking about the Azure stuff I mean these Interfaces from

System.ServiceModel.Routing

• IDuplexSessionRouter
• IRequestReplyRouter
• ISimplexDatagramRouter
• ISimplexSessionRouter

I understand about picking the correct 'binding' for the desired context at the actual service endpoint that's doing the work,....

(I.E. the service that this router (hand-rolled-service_bus) is actually going to route (by EndPointName) messages to)

(there will of course be several services, in the future that are routed per the callers supplied ---EndPointName--- to various services)

...but how are Concurrency and Instance modes handled by these routing "contracts" at this middle layer THE Routing service that implements one or more of these System.ServiceModel.Routing Namespace Interfaces?!

Am I over thinking this and these Routing Contracts (Interfaces) just pass the messages through? As I type this I wonder if I should perhaps actually create a class that inherits the desired routing interface/contract and try to manually apply my desired service behaviors, like one would a normal WCF Interface...

All the examples have been just "using" these routing interfaces not creating a class that implements one of them and tacking on service behaviors thereafter.

Answer 1

The "Routing Service" just passes messages through to the target service based on the routing table.

According to the System.ServiceModel.Routing.dll, v4.0.0.0 assembly, the interface is defined with InstanceContextMode = InstanceContextMode.PerSession definition included below:

namespace System.ServiceModel.Routing
{
    // Summary:
    //     Defines the routing service, which is responsible for routing messages between
    //     endpoints based on filter criteria.
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    [ServiceBehavior(AddressFilterMode = AddressFilterMode.Any, InstanceContextMode = InstanceContextMode.PerSession, UseSynchronizationContext = false, ValidateMustUnderstand = false)]
    public sealed class RoutingService : ISimplexDatagramRouter, ISimplexSessionRouter, IRequestReplyRouter, IDuplexSessionRouter, IDisposable
    {
    }
}