Golang WorkUnit.ActiveAttempt方法代码示例

// workUnitStatus extracts a summary of the status of a single work
// unit.  This produces its external coordinate status and the active
// attempt (if any) on success.
func workUnitStatus(workUnit coordinate.WorkUnit) (status WorkUnitStatus, attempt coordinate.Attempt, err error) {
	var attemptStatus coordinate.AttemptStatus
	attempt, err = workUnit.ActiveAttempt()
	if err == nil && attempt == nil {
		// NB: this also includes "delayed" status
		status = Available
		return
	}
	if err == nil {
		attemptStatus, err = attempt.Status()
	}
	if err == nil {
		switch attemptStatus {
		case coordinate.Pending:
			status = Pending
		case coordinate.Expired:
			status = Available
			attempt = nil
		case coordinate.Finished:
			status = Finished
		case coordinate.Failed:
			status = Failed
		case coordinate.Retryable:
			status = Available
			attempt = nil
		default:
			err = errors.New("unexpected attempt status")
		}
	}
	return
}

func (api *restAPI) fillWorkUnit(namespace coordinate.Namespace, spec coordinate.WorkSpec, unit coordinate.WorkUnit, repr *restdata.WorkUnit) error {
	err := api.fillWorkUnitShort(namespace, spec, unit.Name(), &repr.WorkUnitShort)
	if err == nil {
		repr.Data, err = unit.Data()
	}
	if err == nil {
		var meta coordinate.WorkUnitMeta
		meta, err = unit.Meta()
		repr.Meta = &meta
	}
	if err == nil {
		repr.Status, err = unit.Status()
	}
	if err == nil {
		err = buildURLs(api.Router,
			"namespace", namespace.Name(),
			"spec", spec.Name(),
			"unit", unit.Name(),
		).
			URL(&repr.WorkSpecURL, "workSpec").
			URL(&repr.AttemptsURL, "workUnitAttempts").
			Error
	}
	if err == nil {
		var attempt coordinate.Attempt
		attempt, err = unit.ActiveAttempt()
		if err == nil && attempt != nil {
			// This is cheating, a little, but it's probably
			// the easiest way to reuse this code
			var short restdata.AttemptShort
			err = api.fillAttemptShort(namespace, attempt, &short)
			if err == nil {
				repr.ActiveAttemptURL = short.URL
			}
		}
	}
	return err
}

// UpdateWorkUnit causes some state change in a work unit.  If the
// work unit is pending, this is the principal interface to complete
// or renew it; if it is already complete this can cause it to be
// retried.
func (jobs *JobServer) UpdateWorkUnit(
	workSpecName string,
	workUnitKey string,
	options map[string]interface{},
) (bool, string, error) {
	// Note that in several corner cases, the behavior of this as
	// written disagrees with Python coordinated's:
	//
	// * If neither "lease_time" nor "status" is specified,
	//   Python coordinated immediately returns False without
	//   checking if workUnitKey is valid
	//
	// * Python coordinated allows arbitrary status changes,
	//   including AVAILABLE -> FINISHED
	//
	// * This openly ignores "worker_id", as distinct from Python
	//   coordinated, which logs an obscure warning and changes it,
	//   but only on a renew
	var (
		attempt    coordinate.Attempt
		changed    bool
		err        error
		status     coordinate.AttemptStatus
		uwuOptions UpdateWorkUnitOptions
		workSpec   coordinate.WorkSpec
		workUnit   coordinate.WorkUnit
	)
	err = decode(&uwuOptions, options)
	if err == nil {
		workSpec, err = jobs.Namespace.WorkSpec(workSpecName)
	}
	if err == nil {
		workUnit, err = workSpec.WorkUnit(workUnitKey)
	}
	if err == nil {
		if workUnit == nil {
			return false, fmt.Sprintf("no such work unit key=%v", workUnitKey), nil
		}
	}
	if err == nil {
		attempt, err = workUnit.ActiveAttempt()
	}
	if err == nil && attempt != nil {
		status, err = attempt.Status()
	}
	if err == nil && attempt != nil {
		if status == coordinate.Expired || status == coordinate.Retryable {
			// The Python Coordinate API sees both of these
			// statuses as "available", and we want to fall
			// into the next block.
			attempt = nil
		}
	}
	if err == nil && attempt == nil {
		// Caller is trying to manipulate an AVAILABLE work
		// unit.  Either they are trying to change the work
		// unit data in place, or they are trying to jump a
		// work unit directly to a completed state.  (The
		// latter is possible during the Python work unit
		// parent cleanup, if the timing is bad.)
		if uwuOptions.Status == Available || uwuOptions.Status == 0 {
			// The only thing we are doing is changing the
			// work unit data.
			if uwuOptions.Data != nil {
				meta, err := workUnit.Meta()
				if err == nil {
					_, err = workSpec.AddWorkUnit(workUnit.Name(), uwuOptions.Data, meta)
				}
				if err == nil {
					changed = true
				}
			}
			return changed && err == nil, "", err
		}
		// Otherwise we are trying to transition to another
		// state; so force-create an attempt.
		worker, err := jobs.Namespace.Worker(uwuOptions.WorkerID)
		if err == nil {
			attempt, err = worker.MakeAttempt(workUnit, uwuOptions.LeaseDuration())
			status = coordinate.Pending
		}
	}
	if err == nil {
		switch status {
		case coordinate.Pending:
			changed = true // or there's an error
			switch uwuOptions.Status {
			case 0, Pending:
				err = attempt.Renew(uwuOptions.LeaseDuration(), uwuOptions.Data)
			case Available:
				err = attempt.Expire(uwuOptions.Data)
			case Finished:
				err = attempt.Finish(uwuOptions.Data)
			case Failed:
				err = attempt.Fail(uwuOptions.Data)
			default:
//.........这里部分代码省略.........