adoption

type HashableTiDB struct {
	Features []metav1alpha1.Feature
	Template *v1alpha1.TiDBTemplate
}

type Manager interface {
	// Register records all standby tidbs and will delete records of normal and deleting tidbs.
	Register(dbs ...*v1alpha1.TiDB)
	// Unregister delete a tidb record directly.
	Unregister(ns, name string)
	// Adopt returns an adoptable tidb for a tidbgroup.
	// Index means the adopt times in one reconciliation.
	// Returned adoptable instance will be locked until UnlockFunc is called
	// or locked db is deleted or activated
	Adopt(dbg *v1alpha1.TiDBGroup, index int) (*v1alpha1.TiDB, UnlockFunc)
}

type UnlockFunc func()