private void HandleCommand(ProcessingCommand processingCommand, ICommandHandlerProxy commandHandler)
{
var command = processingCommand.Message;
//调用command handler执行当前command
var handleSuccess = false;
try
{
commandHandler.Handle(processingCommand.CommandExecuteContext, command);
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Handle command success. handlerType:{0}, commandType:{1}, commandId:{2}, aggregateRootId:{3}",
commandHandler.GetInnerHandler().GetType().Name,
command.GetType().Name,
command.Id,
processingCommand.Message.AggregateRootId);
}
handleSuccess = true;
}
catch (IOException ex)
{
_logger.Error(ex);
RetryCommand(processingCommand);
return;
}
catch (Exception ex)
{
HandleExceptionAsync(processingCommand, commandHandler, ex, 0);
return;
}
//如果command执行成功，则提交执行后的结果
if (handleSuccess)
{
try
{
CommitAggregateChanges(processingCommand);
}
catch (Exception ex)
{
LogCommandExecuteException(processingCommand, commandHandler, ex);
NotifyCommandExecuted(processingCommand, CommandStatus.Failed, ex.GetType().Name, "Unknown exception caught when committing changes of command.");
}
}
}
