Golang Job.Error方法代碼示例

// runDDLJob runs a DDL job.
func (d *ddl) runDDLJob(t *meta.Meta, job *model.Job) {
	log.Infof("[ddl] run DDL job %s", job)
	if job.IsFinished() {
		return
	}

	if job.State != model.JobRollback {
		job.State = model.JobRunning
	}

	var err error
	switch job.Type {
	case model.ActionCreateSchema:
		err = d.onCreateSchema(t, job)
	case model.ActionDropSchema:
		err = d.onDropSchema(t, job)
	case model.ActionCreateTable:
		err = d.onCreateTable(t, job)
	case model.ActionDropTable:
		err = d.onDropTable(t, job)
	case model.ActionAddColumn:
		err = d.onAddColumn(t, job)
	case model.ActionDropColumn:
		err = d.onDropColumn(t, job)
	case model.ActionModifyColumn:
		err = d.onModifyColumn(t, job)
	case model.ActionAddIndex:
		err = d.onCreateIndex(t, job)
	case model.ActionDropIndex:
		err = d.onDropIndex(t, job)
	case model.ActionAddForeignKey:
		err = d.onCreateForeignKey(t, job)
	case model.ActionDropForeignKey:
		err = d.onDropForeignKey(t, job)
	case model.ActionTruncateTable:
		err = d.onTruncateTable(t, job)
	default:
		// Invalid job, cancel it.
		job.State = model.JobCancelled
		err = errInvalidDDLJob.Gen("invalid ddl job %v", job)
	}

	// Save errors in job, so that others can know errors happened.
	if err != nil {
		// If job is not cancelled, we should log this error.
		if job.State != model.JobCancelled {
			log.Errorf("[ddl] run ddl job err %v", errors.ErrorStack(err))
		} else {
			log.Infof("[ddl] the job is normal to cancel because %v", errors.ErrorStack(err))
		}

		job.Error = toTError(err)
		job.ErrorCount++
	}
}

func (d *ddl) runDDLJob(t *meta.Meta, job *model.Job) {
	if job.IsFinished() {
		return
	}

	job.State = model.JobRunning

	var err error
	switch job.Type {
	case model.ActionCreateSchema:
		err = d.onCreateSchema(t, job)
	case model.ActionDropSchema:
		err = d.onDropSchema(t, job)
	case model.ActionCreateTable:
		err = d.onCreateTable(t, job)
	case model.ActionDropTable:
		err = d.onDropTable(t, job)
	case model.ActionAddColumn:
		err = d.onAddColumn(t, job)
	case model.ActionDropColumn:
		err = d.onDropColumn(t, job)
	case model.ActionAddIndex:
		err = d.onCreateIndex(t, job)
	case model.ActionDropIndex:
		err = d.onDropIndex(t, job)
	case model.ActionAddForeignKey:
		err = d.onCreateForeignKey(t, job)
	case model.ActionDropForeignKey:
		err = d.onDropForeignKey(t, job)
	default:
		// invalid job, cancel it.
		job.State = model.JobCancelled
		err = errInvalidDDLJob.Gen("invalid ddl job %v", job)
	}

	// saves error in job, so that others can know error happens.
	if err != nil {
		// if job is not cancelled, we should log this error.
		if job.State != model.JobCancelled {
			log.Errorf("run ddl job err %v", errors.ErrorStack(err))
		}

		job.Error = err.Error()
		job.ErrorCount++
	}
}

// runBgJob runs a background job.
func (d *ddl) runBgJob(t *meta.Meta, job *model.Job) {
	job.State = model.JobRunning

	var err error
	switch job.Type {
	case model.ActionDropSchema:
		err = d.delReorgSchema(t, job)
	case model.ActionDropTable, model.ActionTruncateTable:
		err = d.delReorgTable(t, job)
	default:
		job.State = model.JobCancelled
		err = errInvalidBgJob
	}

	if err != nil {
		if job.State != model.JobCancelled {
			log.Errorf("[ddl] run background job err %v", errors.ErrorStack(err))
		}
		job.Error = toTError(err)
		job.ErrorCount++
	}
}

func (d *ddl) runJob(job *model.Job) error {
	if job.State == model.JobDone || job.State == model.JobCancelled {
		return nil
	}

	job.State = model.JobRunning

	var err error
	switch job.Type {
	case model.ActionCreateSchema:
	case model.ActionDropSchema:
	case model.ActionCreateTable:
	case model.ActionDropTable:
	case model.ActionAddColumn:
	case model.ActionDropColumn:
	case model.ActionAddIndex:
	case model.ActionDropIndex:
	case model.ActionAddConstraint:
	case model.ActionDropConstraint:
	default:
		return errors.Errorf("invalid job %v", job)
	}

	// if err and inner doesn't cancel job, return err.
	if err != nil {
		if job.State != model.JobCancelled {
			return errors.Trace(err)
		}

		job.Error = err.Error()
	} else {
		job.State = model.JobDone
	}

	return nil
}