private void ExecuteHandler(Object handler, Object message, Action <Exception> exceptionObserver = null) { var attempt = 0; while (attempt < _maxRetries) { try { var context = new DispatcherInvocationContext(this, handler, message); if (_registry.Interceptors.Count > 0) { // Call interceptors in backward order for (int i = _registry.Interceptors.Count - 1; i >= 0; i--) { var interceptorType = _registry.Interceptors[i]; var interceptor = (IMessageHandlerInterceptor)_serviceLocator.GetInstance(interceptorType); context = new DispatcherInterceptorContext(interceptor, context); } } context.Invoke(); // message handled correctly - so that should be // the final attempt attempt = _maxRetries; } catch (Exception exception) { if (exceptionObserver != null) { exceptionObserver(exception); } attempt++; if (attempt == _maxRetries) { throw new HandlerException(String.Format( "Exception in the handler {0} for message {1}", handler.GetType().FullName, message.GetType().FullName), exception, message); } } } }
/// <summary> /// Initializes a new instance of the <see cref="T:System.Object"/> class. /// </summary> public DispatcherInterceptorContext(IMessageHandlerInterceptor interceptor, DispatcherInvocationContext context) { _interceptor = interceptor; _context = context; }