public override void OnActionExecuting(HttpActionContext actionContext)
        {
            try
            {
                if (actionContext != null)
                {
                    var requestContext = actionContext.RequestContext;
                    if (requestContext != null && requestContext.RouteData != null)
                    {
                        var route = requestContext.RouteData.Route;

                        if (route != null && route.DataTokens != null)
                        {
                            // check whether route is marked as deprecated
                            if (route.DataTokens.ContainsKey(Infrastructure.RouteCollectionExtensions.DeprecatedKey))
                            {
                                var request = actionContext.Request;

                                _analytics.DeprecatedApiUsed(
                                    route.RouteTemplate,
                                    ToString(request.Headers.UserAgent),
                                    ToString(request.Method),
                                    request.RequestUri.AbsolutePath);
                            }
                        }
                    }
                }

                base.OnActionExecuting(actionContext);
            }
            catch (Exception ex)
            {
                _traceFactory.GetTracer().TraceWarning("Trace deprecated error: {0}", ex.ToString());
            }
        }