How to add global error handling in wcf rest service - wcf

Question

In my web applications I make use of the Application_Error function in global.asax to log all exceptions like so:
void Application_Error(object sender, EventArgs e)
{
Exception ex = Server.GetLastError();
while (ex.GetBaseException() != null)
{
ex = ex.GetBaseException();
}
log.writeError(ex.ToString());
}
I've tried similiar in a WCF REST service with no luck. How would I add global error handling? I saw this article, but I'm new to implementing the IServiceBehavior. Where would I add the above code?

Answer 1

I use:
1) AppDomain.CurrentDomain.UnhandledException event
2) TaskScheduler.UnobservedTaskException event
3) IErrorHandler:
public class ErrorHandler : IErrorHandler
{
public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
{
var faultException = new FaultException<string>("Server error: " + error.Format());
var messageFault = faultException.CreateMessageFault();
fault = Message.CreateMessage(version, messageFault, null);
}
public bool HandleError(Exception error)
{
return false;
//return true; //if handled
}
}
[AttributeUsage(AttributeTargets.Class)]
public class ErrorHandlerBehavior : Attribute, IEndpointBehavior, IServiceBehavior
{
public void Validate(ServiceEndpoint endpoint)
{
}
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
endpointDispatcher.ChannelDispatcher.ErrorHandlers.Add(new ErrorHandler());
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
}
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
}
public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
{
}
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
foreach (ChannelDispatcher channelDispatcher in serviceHostBase.ChannelDispatchers)
{
channelDispatcher.ErrorHandlers.Add(new ErrorHandler());
}
}
}
This can be applied to entire service impl. class:
[ErrorHandlerBehavior]
public class SubscriberInfoTaskService : {}
or to endpoint:
var endpoint = Host.Description.Endpoints.FirstOrDefault();
//foreach (ChannelDispatcher channelDispatcher in Host.ChannelDispatchers) //ChannelDispatcherBase
//{
// channelDispatcher.ErrorHandlers.Add(new ErrorHandler());
//}
endpoint.Behaviors.Add(new ErrorHandlerBehavior());
here about using config: http://www.steverb.com/post/2008/11/24/Useful-WCF-Behaviors-IErrorHandler.aspx