Adding global error handling to WCF REST service - wcf

Question

I have a WCF/REST Web Service that I'm trying to add a global exception handler to. I'm looking for something similar to the Application_Error event in a standard .NET website.
I've found lots of info about using IErrorHandler and IServiceBehavior like what's detailed here: http://msdn.microsoft.com/en-us/library/system.servicemodel.dispatcher.ierrorhandler.aspx#Y1479
That seems like what I need, but every example I've found assumes that the service is defined in the web.config. I'm not doing that - I'm using RouteTables, configured in the global.asax, like so:
public class Global : HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
RegisterRoutes();
}
private void RegisterRoutes()
{
// Edit the base address of Service1 by replacing the "Service1" string below
RouteTable.Routes.Add(new ServiceRoute("", new WebServiceHost2Factory(), typeof(myService)));
}
So, given that, how do I configure my custom IErrorHandler and IServiceBehavior? Am I even on the right track, given that I'm using a RouteTable rather than configuring it via the web.config? I'm very new to WCF....

Answer 1

The wiring up of your IServiceBehaviour can be achieved by creating a custom WebServiceHostFactory that overrides CreateServiceHost.
For example if you have a class GlobalErrorHandlerBehaviour which implements IServiceBehavior, then you could wire it up as follows:
public class CustomWebServiceHostFactory : WebServiceHostFactory
{
protected override ServiceHost CreateServiceHost(System.Type serviceType, System.Uri[] baseAddresses)
{
return ApplyGlobalErrorHandler(base.CreateServiceHost(serviceType, baseAddresses));
}
private ServiceHost ApplyGlobalErrorHandler(ServiceHost serviceHost)
{
serviceHost.Description.Behaviors.Add(new GlobalErrorHandlerBehaviour());
return serviceHost;
}
}
You would then update your call to the ServiceRoute constructor to pass in this custom factory.