Unity Dependance Injection of a WCF service via web.config

Question

I have a project that I am experimenting with DI in. I am using Unity and things seem to work well for normal assemblies and the injections.

I am trying to further break dependencies with WCF services. The WCF service that I want to inject is created at runtime currently without using DI and I don't use the VS .net generated proxies:

MyService = new ChannelFactory<IMyService>("BasicHttpBinding_IMyService").CreateChannel();

Endpoint for the above is in the web.config:

<endpoint address="http://localhost:35806/MyService.svc"
       binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IMyService"
       contract="Interfaces.IMyService" name="BasicHttpBinding_IMyService" />

I am trying to figure out how to map this WCF service to an interface via the web.config so that I can use constructor injection

In web.config the normal mapping occurs using the "mapTo" where you would specify the interface alias and an alias to a class you previously defined.

<type type="IMyService" mapTo="MyService">
 <lifetime type="singleton"/>
</type>

Since the WCF service proxy is created dynamically at run time I do not have this reference to "MyService" class instead it needs to pull from the "BasicHttpBinding_IMyService" endpoint for the service.

Any ideas on how this can be accomplished?

Answer 1

The only way I see this working from the config file is to create a MyService class that implements IMyService - and behind the scenes it creates its own Channel (using the ChannelFactory code snippet) and essentially acts as a proxy.

But instead of that, why not just call

RegisterInstance<IMyService>(myServiceChannelInstance)

on your unity container and pass in an already created MyService channel instance?