CancelRobotTaskCommandHandler.cs
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using MassTransit;
using Microsoft.Extensions.Logging;
using Rcs.Application.Common;
using Rcs.Application.MessageBus.Commands;
using Rcs.Domain.Extensions;
using Rcs.Domain.Repositories;
namespace Rcs.Infrastructure.MessageBus.Handlers.Commands;
/// <summary>
/// 取消机器人任务命令处理器
/// 职责：协调领域操作，实际取消指令下发由领域事件处理器完成
/// @author zzy
/// </summary>
public class CancelRobotTaskCommandHandler : IConsumer<CancelRobotTaskCommand>
{
private readonly ILogger<CancelRobotTaskCommandHandler> _logger;
private readonly IRobotRepository _robotRepository;
public CancelRobotTaskCommandHandler(
ILogger<CancelRobotTaskCommandHandler> logger,
IRobotRepository robotRepository)
{
_logger = logger;
_robotRepository = robotRepository;
}
public async Task Consume(ConsumeContext<CancelRobotTaskCommand> context)
{
var command = context.Message;
try
{
var robot = await _robotRepository.GetByIdAsync(command.RobotId, context.CancellationToken);
if (robot == null)
{
throw new BusinessException($"机器人ID {command.RobotId} 不存在");
}
// 调用 Robot 领域方法取消任务，触发 RobotTaskCancelledDomainEvent
// 事件处理器负责：1.向机器人下发取消指令 2.更新任务状态
robot.CancelTask(null);
// 保存变更，领域事件会在 SaveChangesAsync 中同步分发
// await _robotRepository.SaveChangesAsync(context.CancellationToken);
await context.RespondAsync(ApiResponse.Successful());
}
catch (Exception ex)
{
_logger.LogError(ex, "取消机器人任务失败: {RobotId}", command.RobotId);
await context.RespondAsync(ApiResponse.Failed(ex.Message));
}
}
}