/// <summary>
    /// Атрибут для логирования действий контроллеров
    /// </summary>
    public class LogAttribute: ActionFilterAttribute
    {
        public LogLevel Level { get; set; }
        public String Name { get; set; }

        public LogAttribute()
        {
            Level = LogLevel.All;
        }

        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (String.IsNullOrEmpty(Name))
                Name = String.Format("{0}.{1}", filterContext.ActionDescriptor.ControllerDescriptor.ControllerType.FullName, filterContext.ActionDescriptor.ActionName);

            var logger = LogManager.GetLogger(Name);

            if (logger is NoOpLogger)
                throw new KeyNotFoundException(String.Format("Не найден логгер для указанного источника '{0}'", Name));

            Action<FormatMessageHandler> action = handler => handler(
                "Пользователь: {0}, Источник: {1}, Метод: {2}, Аргументы: {3}", 
                filterContext.RequestContext.HttpContext.User.Identity.Name,
                filterContext.ActionDescriptor.ControllerDescriptor.ControllerType.FullName,
                filterContext.ActionDescriptor.ActionName,
                String.Join(", ", filterContext.ActionParameters.Select(kv => String.Format("{0}='{1}'", kv.Key, kv.Value))));

            switch (Level)
            {
                case LogLevel.All:
                case LogLevel.Trace:
                    logger.Trace(action);
                    break;
                case LogLevel.Debug:
                    logger.Debug(action);
                    break;
                case LogLevel.Info:
                    logger.Info(action);
                    break;
                case LogLevel.Warn:
                    logger.Warn(action);
                    break;
                case LogLevel.Error:
                    logger.Error(action);
                    break;
                case LogLevel.Fatal:
                    logger.Fatal(action);
                    break;
                case LogLevel.Off:
                    break;
                default:
                    throw new ArgumentOutOfRangeException("Неизвестный науке зверь...");
            }

            base.OnActionExecuting(filterContext);
        }
    }