public void Handle(ProcessingCommand processingCommand)
{
var command = processingCommand.Message;
if (string.IsNullOrEmpty(command.AggregateRootId))
{
var errorMessage = string.Format("The aggregateRootId of command cannot be null or empty. commandType:{0}, commandId:{1}", command.GetType().Name, command.Id);
_logger.Error(errorMessage);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, errorMessage);
return;
}
ICommandHandlerProxy commandHandler;
var findResult = GetCommandHandler(processingCommand, commandType => _commandHandlerProvider.GetHandlers(commandType), out commandHandler);
if (findResult == HandlerFindResult.Found)
{
HandleCommand(processingCommand, commandHandler);
}
else if (findResult == HandlerFindResult.TooManyHandlerData)
{
_logger.ErrorFormat("Found more than one command handler data, commandType:{0}, commandId:{1}", command.GetType().FullName, command.Id);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, "More than one command handler data found.");
}
else if (findResult == HandlerFindResult.TooManyHandler)
{
_logger.ErrorFormat("Found more than one command handler, commandType:{0}, commandId:{1}", command.GetType().FullName, command.Id);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, "More than one command handler found.");
}
else if (findResult == HandlerFindResult.NotFound)
{
ICommandAsyncHandlerProxy commandAsyncHandler;
findResult = GetCommandHandler(processingCommand, commandType => _commandAsyncHandlerProvider.GetHandlers(commandType), out commandAsyncHandler);
if (findResult == HandlerFindResult.Found)
{
HandleCommand(processingCommand, commandAsyncHandler);
}
else if (findResult == HandlerFindResult.TooManyHandlerData)
{
_logger.ErrorFormat("Found more than one command async handler data, commandType:{0}, commandId:{1}", command.GetType().FullName, command.Id);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, "More than one command async handler data found.");
}
else if (findResult == HandlerFindResult.TooManyHandler)
{
_logger.ErrorFormat("Found more than one command async handler, commandType:{0}, commandId:{1}", command.GetType().FullName, command.Id);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, "More than one command async handler found.");
}
else if (findResult == HandlerFindResult.NotFound)
{
var errorMessage = string.Format("No command handler found of command. commandType:{0}, commandId:{1}", command.GetType().Name, command.Id);
_logger.Error(errorMessage);
CompleteCommand(processingCommand, CommandStatus.Failed, typeof(string).FullName, errorMessage);
}
}
}
private ICommandAsyncHandlerProxy GetCommandAsyncHandler(ProcessingCommand processingCommand)
{
var command = processingCommand.Message;
var commandAsyncHandlers = _commandAsyncHandlerProvider.GetHandlers(command.GetType());
if (commandAsyncHandlers.Count() > 1)
{
_logger.ErrorFormat("Found more than one command handlers, commandType:{0}, commandId:{1}.", command.GetType().FullName, command.Id);
NotifyCommandExecuted(processingCommand, CommandStatus.Failed, null, "More than one command handlers found.");
return(null);
}
return(commandAsyncHandlers.SingleOrDefault());
}