/// <summary>
/// 执行命令
/// </summary>
/// <typeparam name="TCommand">命令类型</typeparam>
/// <typeparam name="TPrimaryKey">主键类型</typeparam>
/// <param name="command">命令对象</param>
/// <returns>命令结果对象</returns>
public CommandResult Execute <TCommand, TPrimaryKey>(TCommand command) where TCommand : ICommand <TPrimaryKey>
{
ICommandContext context = ObjectContainer.Resolve <ICommandContext>();
CommandResult commandResult;
try
{
ICommandHandler <TCommand, TPrimaryKey> commandHandler = ObjectContainer.Resolve <ICommandHandler <TCommand, TPrimaryKey> >();
TimeSpan ts = ActionHelper.StopwatchAction(() =>
{
commandHandler.Handler(context, command);
context.Commit();
});
commandResult = new CommandResult(command.AggregateRoot, CommandStatus.Success, command.Id.ToString(), ts.Milliseconds);
}
catch (Exception ex)
{
ObjectContainer.Resolve <ILoggerFactory>().CreateLogger(typeof(CommandService)).Error("CommandService执行出错", ex);
context.Rollback();
commandResult = new CommandResult(command.AggregateRoot, CommandStatus.Failed, result: ex.Message);
}
finally
{
context.Dispose();
}
this.SaveCommand(commandResult);
return(commandResult);
}
CommandResult Handle(ICommandContext commandContext, CommandRequest command)
{
var commandResult = new CommandResult();
try
{
using (_localizer.BeginScope())
{
_logger.Information($"Handle command of type {command.Type}");
commandResult = CommandResult.ForCommand(command);
_logger.Trace("Authorize");
var authorizationResult = _commandSecurityManager.Authorize(command);
if (!authorizationResult.IsAuthorized)
{
_logger.Trace("Command not authorized");
commandResult.SecurityMessages = authorizationResult.BuildFailedAuthorizationMessages();
commandContext.Rollback();
return(commandResult);
}
_logger.Trace("Validate");
var validationResult = _commandValidationService.Validate(command);
commandResult.ValidationResults = validationResult.ValidationResults;
commandResult.CommandValidationMessages = validationResult.CommandErrorMessages;
if (commandResult.Success)
{
_logger.Trace("Command is considered valid");
try
{
_logger.Trace("Handle the command");
_commandHandlerManager.Handle(command);
_logger.Trace("Collect any broken rules");
commandResult.BrokenRules = commandContext.GetObjectsBeingTracked()
.SelectMany(_ => _.BrokenRules)
.Select(_ => new BrokenRuleResult(
_.Rule.Name,
$"EventSource: {_.Context.Target.GetType().Name} - with id {((IEventSource)_.Context.Target).EventSourceId.Value}",
_.Instance?.ToString() ?? "[Not Set]",
_.Causes));
_logger.Trace("Commit transaction");
commandContext.Commit();
}
catch (TargetInvocationException ex)
{
_logger.Error(ex, "Error handling command");
commandResult.Exception = ex.InnerException;
commandContext.Rollback();
}
catch (Exception ex)
{
_logger.Error(ex, "Error handling command");
commandResult.Exception = ex;
commandContext.Rollback();
}
}
else
{
_logger.Information("Command was not successful, rolling back");
commandContext.Rollback();
}
}
}
catch (TargetInvocationException ex)
{
_logger.Error(ex, "Error handling command");
commandResult.Exception = ex.InnerException;
}
catch (Exception ex)
{
_logger.Error(ex, "Error handling command");
commandResult.Exception = ex;
}
return(commandResult);
}
public void Dispose()
{
_commandContext.Commit();
}