public async Task <ApiResponse <PatchResult> > Patch(
Guid id, [FromBody] StateMachineInstancePatchDto dto)
{
var patchResult = await _stateMachineInstanceService.Patch(id, dto);
var result = new PatchResult(patchResult.Code == 200 ? 1 : 0);
return(ApiResponse.Custom(Response, patchResult.Code, patchResult.Message, result));
}
public async Task <StateMachineInstancePatchResultDto> Patch(Guid id, StateMachineInstancePatchDto dto)
{
// 更新阶段, 参数和并发键
StateMachineInstanceEntity stateMachineInstanceEntity = null;
StateMachineEntity stateMachineEntity = null;
for (int from = 0; from <= ConcurrencyErrorMaxRetryTimes; ++from)
{
stateMachineInstanceEntity = await _repository.QueryAsync(q =>
q.FirstOrDefaultAsyncTestable(x => x.Id == id));
if (stateMachineInstanceEntity == null)
{
return(StateMachineInstancePatchResultDto.NotFound("state machine instance not found"));
}
stateMachineEntity = await _stateMachineRepository.QueryNoTrackingAsync(q =>
q.FirstOrDefaultAsyncTestable(x => x.Name == stateMachineInstanceEntity.Name));
if (stateMachineEntity == null)
{
return(StateMachineInstancePatchResultDto.NotFound("state machine not found"));
}
stateMachineInstanceEntity.Status = StateMachineStatus.Running;
stateMachineInstanceEntity.Stage = dto.Stage ?? StateMachineBase.InitialStage;
stateMachineInstanceEntity.ExecutionKey = PrimaryKeyUtils.Generate <Guid>().ToString();
stateMachineInstanceEntity.FromManagementService = _configuration.Name;
stateMachineInstanceEntity.StartTime = DateTime.UtcNow; // 柚子大姐要求
if (dto.Parameters != null)
{
var parameters = stateMachineInstanceEntity.Parameters;
foreach (var pair in dto.Parameters)
{
parameters[pair.Key] = pair.Value;
}
stateMachineInstanceEntity.Parameters = parameters;
}
try
{
await _repository.SaveChangesAsync();
break;
}
catch (DbUpdateConcurrencyException)
{
if (from == ConcurrencyErrorMaxRetryTimes)
{
throw;
}
await Task.Delay(1);
}
}
// 创建状态机实例
var stateMachineInstance = await _stateMachineInstanceStore.CreateInstance(
stateMachineEntity, stateMachineInstanceEntity);
// 运行状态机, 从这里开始会在后台运行
#pragma warning disable CS4014
_stateMachineInstanceStore.RunInstance(stateMachineInstance);
#pragma warning restore CS4014
return(StateMachineInstancePatchResultDto.Success());
}
