Elmah Pipeline Module for Signalr

ElmahPipelineModule.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using Elmah;
using Microsoft.AspNet.SignalR.Hubs;

namespace App.Website.Support.SignalrPipelineExtensions
{
    public class ElmahPipelineModule : HubPipelineModule
    {
        private static bool RaiseErrorSignal(Exception e)
        {
            var context = HttpContext.Current;
            if (context == null)
                return false;
            var signal = ErrorSignal.FromContext(context);
            if (signal == null)
                return false;
            signal.Raise(e, context);
            return true;
        }

        private static void LogException(Exception e)
        {
            var context = HttpContext.Current;
            ErrorLog.GetDefault(context).Log(new Error(e, context));
        }

        protected override void OnIncomingError(Exception ex, IHubIncomingInvokerContext context)
        {
            var exception = ex;
            if (ex is TargetInvocationException)
            {
                exception = ex.InnerException;
            }
            else if (ex is AggregateException)
            {
                exception = ex.InnerException;
            }

            if(!RaiseErrorSignal(exception))
                LogException(exception);
        }
    }
}