本文整理匯總了Golang中github.com/pingcap/tidb/meta.Meta.SetDDLJobOwner方法的典型用法代碼示例。如果您正苦於以下問題：Golang Meta.SetDDLJobOwner方法的具體用法？Golang Meta.SetDDLJobOwner怎麽用？Golang Meta.SetDDLJobOwner使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/pingcap/tidb/meta.Meta的用法示例。
在下文中一共展示了Meta.SetDDLJobOwner方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
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
}示例2: checkOwner
func (d *ddl) checkOwner(t *meta.Meta, flag JobType) (*model.Owner, error) {
owner, err := d.getJobOwner(t, flag)
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()
maxTimeout := d.getCheckOwnerTimeout(flag)
sub := now - owner.LastUpdateTS
if owner.OwnerID == d.uuid || sub > 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, owner is %s sub %vs", flag, owner, sub/1e9)
}
if owner.OwnerID != d.uuid {
log.Debugf("[ddl] not %s job owner, self id %s owner is %s", flag, d.uuid, owner.OwnerID)
return nil, errors.Trace(errNotOwner)
}
return owner, nil
}