public void Dispatch(Object message) { try { var handlerTypes = _registry.GetHandlersType(message.GetType()); foreach (var handlerType in handlerTypes) { var handler = _serviceLocator.GetInstance(handlerType); 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) { attempt++; if (attempt == _maxRetries) { throw new HandlerException( $"Exception in the handler {handler.GetType().FullName} for message {message.GetType().FullName}", exception, message); } } } } } catch (Exception exception) { throw new DispatchingException("Error when dispatching message", exception); } }
/// <summary> /// Initializes a new instance of the <see cref="T:System.Object"/> class. /// </summary> public DispatcherInterceptorContext(IMessageHandlerInterceptor interceptor, DispatcherInvocationContext context) { _interceptor = interceptor; _context = context; }