store

Documentation

Overview

Package store defines etcd's in-memory key/value store.

Index

• Constants
• Variables
• type Event
  • func (e *Event) Clone() *Event
  • func (e *Event) Index() uint64
  • func (e *Event) IsCreated() bool
• type EventHistory
• type NodeExtern
  • func (eNode *NodeExtern) Clone() *NodeExtern
• type NodeExterns
  • func (ns NodeExterns) Len() int
  • func (ns NodeExterns) Less(i, j int) bool
  • func (ns NodeExterns) Swap(i, j int)
• type Stats
  • func (s *Stats) Inc(field int)
• type Store
  • func New(namespaces ...string) Store
• type TTLOptionSet
• type Watcher
  • func NewNopWatcher() Watcher

Constants

const (
	Get              = "get"
	Create           = "create"
	Set              = "set"
	Update           = "update"
	Delete           = "delete"
	CompareAndSwap   = "compareAndSwap"
	CompareAndDelete = "compareAndDelete"
	Expire           = "expire"
)

const (
	CompareMatch = iota
	CompareIndexNotMatch
	CompareValueNotMatch
	CompareNotMatch
)

explanations of Compare function result

const (
	SetSuccess = iota
	SetFail
	DeleteSuccess
	DeleteFail
	CreateSuccess
	CreateFail
	UpdateSuccess
	UpdateFail
	CompareAndSwapSuccess
	CompareAndSwapFail
	GetSuccess
	GetFail
	ExpireCount
	CompareAndDeleteSuccess
	CompareAndDeleteFail
)

const (
	GetRecursive = "getRecursive"
)

Variables

var Permanent time.Time

Types

type Event

type Event struct {
	Action    string      `json:"action"`
	Node      *NodeExtern `json:"node,omitempty"`
	PrevNode  *NodeExtern `json:"prevNode,omitempty"`
	EtcdIndex uint64      `json:"-"`
}

func (*Event) Clone

func (e *Event) Clone() *Event

func (*Event) Index

func (e *Event) Index() uint64

func (*Event) IsCreated

func (e *Event) IsCreated() bool

type EventHistory

type EventHistory struct {
	Queue      eventQueue
	StartIndex uint64
	LastIndex  uint64
	// contains filtered or unexported fields
}

type NodeExtern

type NodeExtern struct {
	Key           string      `json:"key,omitempty"`
	Value         *string     `json:"value,omitempty"`
	Dir           bool        `json:"dir,omitempty"`
	Expiration    *time.Time  `json:"expiration,omitempty"`
	TTL           int64       `json:"ttl,omitempty"`
	Nodes         NodeExterns `json:"nodes,omitempty"`
	ModifiedIndex uint64      `json:"modifiedIndex,omitempty"`
	CreatedIndex  uint64      `json:"createdIndex,omitempty"`
}

NodeExtern is the external representation of the internal node with additional fields PrevValue is the previous value of the node TTL is time to live in second

func (*NodeExtern) Clone

func (eNode *NodeExtern) Clone() *NodeExtern

type NodeExterns

type NodeExterns []*NodeExtern

func (NodeExterns) Len

func (ns NodeExterns) Len() int

func (NodeExterns) Less

func (ns NodeExterns) Less(i, j int) bool

func (NodeExterns) Swap

func (ns NodeExterns) Swap(i, j int)

type Stats

type Stats struct {
	GetSuccess uint64 `json:"getsSuccess"`
	GetFail    uint64 `json:"getsFail"`

	SetSuccess uint64 `json:"setsSuccess"`
	SetFail    uint64 `json:"setsFail"`

	DeleteSuccess uint64 `json:"deleteSuccess"`
	DeleteFail    uint64 `json:"deleteFail"`

	UpdateSuccess uint64 `json:"updateSuccess"`
	UpdateFail    uint64 `json:"updateFail"`

	CreateSuccess uint64 `json:"createSuccess"`
	CreateFail    uint64 `json:"createFail"`

	CompareAndSwapSuccess uint64 `json:"compareAndSwapSuccess"`
	CompareAndSwapFail    uint64 `json:"compareAndSwapFail"`

	CompareAndDeleteSuccess uint64 `json:"compareAndDeleteSuccess"`
	CompareAndDeleteFail    uint64 `json:"compareAndDeleteFail"`

	ExpireCount uint64 `json:"expireCount"`

	Watchers uint64 `json:"watchers"`
}

func (*Stats) Inc

func (s *Stats) Inc(field int)

type Store

type Store interface {
	Version() int
	Index() uint64

	Get(nodePath string, recursive, sorted bool) (*Event, error)
	Set(nodePath string, dir bool, value string, expireOpts TTLOptionSet) (*Event, error)
	Update(nodePath string, newValue string, expireOpts TTLOptionSet) (*Event, error)
	Create(nodePath string, dir bool, value string, unique bool,
		expireOpts TTLOptionSet) (*Event, error)
	CompareAndSwap(nodePath string, prevValue string, prevIndex uint64,
		value string, expireOpts TTLOptionSet) (*Event, error)
	Delete(nodePath string, dir, recursive bool) (*Event, error)
	CompareAndDelete(nodePath string, prevValue string, prevIndex uint64) (*Event, error)

	Watch(prefix string, recursive, stream bool, sinceIndex uint64) (Watcher, error)

	Save() ([]byte, error)
	Recovery(state []byte) error

	Clone() Store
	SaveNoCopy() ([]byte, error)

	JsonStats() []byte
	DeleteExpiredKeys(cutoff time.Time)
}

func New

func New(namespaces ...string) Store

New creates a store where the given namespaces will be created as initial directories.

type TTLOptionSet

type TTLOptionSet struct {
	ExpireTime time.Time
	Refresh    bool
}

type Watcher

type Watcher interface {
	EventChan() chan *Event
	StartIndex() uint64 // The EtcdIndex at which the Watcher was created
	Remove()
}

func NewNopWatcher

func NewNopWatcher() Watcher