owner

type DDLOwnerChecker interface {
	// IsOwner returns whether the ownerManager is the owner.
	IsOwner() bool
}

type Listener interface {
	OnBecomeOwner()
	OnRetireOwner()
}

type ListenersWrapper struct {
	// contains filtered or unexported fields
}

type Manager interface {
	// ID returns the ID of the manager.
	ID() string
	// IsOwner returns whether the ownerManager is the owner.
	IsOwner() bool
	// RetireOwner make the manager to be a not owner. It's exported for testing.
	RetireOwner()
	// GetOwnerID gets the owner ID.
	GetOwnerID(ctx context.Context) (string, error)
	// SetOwnerOpValue updates the owner op value.
	SetOwnerOpValue(ctx context.Context, op OpType) error
	// CampaignOwner campaigns the owner. It will start a background goroutine to
	// campaign owner in a loop, and when become or retire owner, it will call methods
	// of the listener.
	CampaignOwner(...int) error
	// CampaignCancel cancels one etcd campaign, it will also close the underlying
	// etcd session. After this method is called, the manager can be used to campaign
	// owner again.
	CampaignCancel()
	// BreakCampaignLoop breaks the campaign loop, related listener methods will
	// be called. The underlying etcd session the related campaign key will remain,
	// so if some instance is the owner before, after break and campaign again, it
	// will still be the owner.
	BreakCampaignLoop()
	// ResignOwner will resign and start a new election if it's the owner.
	ResignOwner(ctx context.Context) error
	// Close closes the manager, after close, no methods can be called.
	Close()
	// SetListener sets the listener, set before CampaignOwner.
	SetListener(listener Listener)
	// ForceToBeOwner restart the owner election and trying to be the new owner by
	// end campaigns of all candidates and start a new campaign in a single transaction.
	//
	// This method is only used during upgrade and try to make node of newer version
	// to be the DDL owner, to mitigate the issue https://github.com/pingcap/tidb/issues/54689,
	// current instance shouldn't call CampaignOwner before calling this method.
	// don't use it in other cases.
	//
	// Note: only one instance can call this method at a time, so you have to use
	// a distributed lock when there are multiple instances of new version TiDB trying
	// to be the owner. See runInBootstrapSession for where we lock it in DDL.
	ForceToBeOwner(ctx context.Context) error
}

type MockGlobalState struct {
	// contains filtered or unexported fields
}

type MockGlobalStateSelector struct {
	// contains filtered or unexported fields
}

type OpType byte