owner

Documentation

Index

• Constants
• Variables
• func GetOwnerInfo(ctx, logCtx context.Context, elec *concurrency.Election, id string) (string, error)
• func NewSession(ctx context.Context, logPrefix string, etcdCli *clientv3.Client, ...) (*concurrency.Session, error)
• type DDLOwnerChecker
• type Manager
  • func NewMockManager(id string, cancel context.CancelFunc) Manager
  • func NewOwnerManager(etcdCli *clientv3.Client, prompt, id, key string, cancel context.CancelFunc) Manager

Constants

const (
	// NewSessionDefaultRetryCnt is the default retry times when create new session.
	NewSessionDefaultRetryCnt = 3
	// NewSessionRetryUnlimited is the unlimited retry times when create new session.
	NewSessionRetryUnlimited = math.MaxInt64
)

Variables

var ManagerSessionTTL = 60

ManagerSessionTTL is the etcd session's TTL in seconds. It's exported for testing.

Functions

func GetOwnerInfo

func GetOwnerInfo(ctx, logCtx context.Context, elec *concurrency.Election, id string) (string, error)

GetOwnerInfo gets the owner information.

func NewSession

func NewSession(ctx context.Context, logPrefix string, etcdCli *clientv3.Client, retryCnt, ttl int) (*concurrency.Session, error)

NewSession creates a new etcd session.

Types

type DDLOwnerChecker

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

DDLOwnerChecker is used to check whether tidb is owner.

type Manager

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)
	// CampaignOwner campaigns the owner.
	CampaignOwner(ctx context.Context) error
	// ResignOwner lets the owner start a new election.
	ResignOwner(ctx context.Context) error
	// Cancel cancels this etcd ownerManager campaign.
	Cancel()
}

Manager is used to campaign the owner and manage the owner information.

func NewMockManager

func NewMockManager(id string, cancel context.CancelFunc) Manager

NewMockManager creates a new mock Manager.

func NewOwnerManager

func NewOwnerManager(etcdCli *clientv3.Client, prompt, id, key string, cancel context.CancelFunc) Manager

NewOwnerManager creates a new Manager.