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Golang Meta.GetDDLJobOwner方法代码示例

本文整理汇总了Golang中github.com/pingcap/tidb/meta.Meta.GetDDLJobOwner方法的典型用法代码示例。如果您正苦于以下问题:Golang Meta.GetDDLJobOwner方法的具体用法?Golang Meta.GetDDLJobOwner怎么用?Golang Meta.GetDDLJobOwner使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在github.com/pingcap/tidb/meta.Meta的用法示例。


在下文中一共展示了Meta.GetDDLJobOwner方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: checkOwner

func (d *ddl) checkOwner(t *meta.Meta, flag JobType) (*model.Owner, error) {
	var owner *model.Owner
	var err error

	switch flag {
	case ddlJobFlag:
		owner, err = t.GetDDLJobOwner()
	case bgJobFlag:
		owner, err = t.GetBgJobOwner()
	default:
		err = errInvalidJobFlag
	}
	if err != nil {
		return nil, errors.Trace(err)
	}

	if owner == nil {
		owner = &model.Owner{}
		// try to set onwer
		owner.OwnerID = d.uuid
	}

	now := time.Now().UnixNano()
	// we must wait 2 * lease time to guarantee other servers update the schema,
	// the owner will update its owner status every 2 * lease time, so here we use
	// 4 * lease to check its timeout.
	maxTimeout := int64(4 * d.lease)
	if owner.OwnerID == d.uuid || now-owner.LastUpdateTS > maxTimeout {
		owner.OwnerID = d.uuid
		owner.LastUpdateTS = now
		// update status.
		switch flag {
		case ddlJobFlag:
			err = t.SetDDLJobOwner(owner)
		case bgJobFlag:
			err = t.SetBgJobOwner(owner)
		}
		if err != nil {
			return nil, errors.Trace(err)
		}
		log.Debugf("[ddl] become %s job owner %s", flag, owner.OwnerID)
	}

	if owner.OwnerID != d.uuid {
		log.Debugf("[ddl] not %s job owner, owner is %s", flag, owner.OwnerID)
		return nil, errors.Trace(errNotOwner)
	}

	return owner, nil
}
开发者ID:XuHuaiyu,项目名称:tidb,代码行数:50,代码来源:ddl_worker.go

示例2: getJobOwner

func (d *ddl) getJobOwner(t *meta.Meta, flag JobType) (*model.Owner, error) {
	var owner *model.Owner
	var err error

	switch flag {
	case ddlJobFlag:
		owner, err = t.GetDDLJobOwner()
	case bgJobFlag:
		owner, err = t.GetBgJobOwner()
	default:
		err = errInvalidJobFlag
	}

	return owner, errors.Trace(err)
}
开发者ID:jmptrader,项目名称:tidb,代码行数:15,代码来源:ddl_worker.go


注:本文中的github.com/pingcap/tidb/meta.Meta.GetDDLJobOwner方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。