badgerstore

Documentation

Index

• Variables
• func DecodeMsgPack(buf []byte, out interface{}) error
• func EncodeMsgPack(in interface{}, useNewTimeFormat bool) (*bytes.Buffer, error)
• func End(prefix []byte) []byte
• type BadgerStore
  • func New(db *badger.DB, options Options) (*BadgerStore, error)
  • func NewBadgerStore(path string) (*BadgerStore, error)
  • func (b *BadgerStore) Close() error
  • func (b *BadgerStore) DeleteRange(min, max uint64) error
  • func (b *BadgerStore) FirstIndex() (uint64, error)
  • func (b *BadgerStore) Get(k []byte) ([]byte, error)
  • func (b *BadgerStore) GetLog(idx uint64, raftLog *raft.Log) error
  • func (b *BadgerStore) GetUint64(key []byte) (uint64, error)
  • func (b *BadgerStore) LastIndex() (uint64, error)
  • func (b *BadgerStore) RunValueLogGC(discardRatio float64) error
  • func (b *BadgerStore) Set(k, v []byte) error
  • func (b *BadgerStore) SetUint64(key []byte, val uint64) error
  • func (b *BadgerStore) Size() (lsm, vlog int64)
  • func (b *BadgerStore) StoreLog(log *raft.Log) error
  • func (b *BadgerStore) StoreLogs(logs []*raft.Log) error
• type Options
• type Store

Variables

var (

	// An error indicating a given key does not exist
	ErrKeyNotFound = errors.New("not found")
)

Functions

func DecodeMsgPack

func DecodeMsgPack(buf []byte, out interface{}) error

Decode reverses the encode operation on a byte slice input

func EncodeMsgPack

func EncodeMsgPack(in interface{}, useNewTimeFormat bool) (*bytes.Buffer, error)

Encode writes an encoded object to a new bytes buffer

func End

func End(prefix []byte) []byte

Copy the prefix into a new slice that is one larger than the prefix and add an `0xFF` byte to it so

Types

type BadgerStore

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

BadgerStore provides access to Badger for Raft to store and retrieve log entries. It also provides key/value storage, and can be used as a LogStore and StableStore.

func New

func New(db *badger.DB, options Options) (*BadgerStore, error)

New uses the supplied options to open the Badger and prepare it for use as a raft backend.

func NewBadgerStore

func NewBadgerStore(path string) (*BadgerStore, error)

NewBadgerStore takes a file path and returns a connected Raft backend.

func (*BadgerStore) Close

func (b *BadgerStore) Close() error

Close is used to gracefully close the DB connection.

func (*BadgerStore) DeleteRange

func (b *BadgerStore) DeleteRange(min, max uint64) error

DeleteRange is used to delete logs within a given range inclusively.

func (*BadgerStore) FirstIndex

func (b *BadgerStore) FirstIndex() (uint64, error)

FirstIndex returns the first known index from the Raft log.

func (*BadgerStore) Get

func (b *BadgerStore) Get(k []byte) ([]byte, error)

Get is used to retrieve a value from the k/v store by key

func (*BadgerStore) GetLog

func (b *BadgerStore) GetLog(idx uint64, raftLog *raft.Log) error

GetLog is used to retrieve a log from badger at a given index.

func (*BadgerStore) GetUint64

func (b *BadgerStore) GetUint64(key []byte) (uint64, error)

GetUint64 is like Get, but handles uint64 values

func (*BadgerStore) LastIndex

func (b *BadgerStore) LastIndex() (uint64, error)

LastIndex returns the last known index from the Raft log.

func (*BadgerStore) RunValueLogGC

func (b *BadgerStore) RunValueLogGC(discardRatio float64) error

func (*BadgerStore) Set

func (b *BadgerStore) Set(k, v []byte) error

Set is used to set a key/value set outside of the raft log

func (*BadgerStore) SetUint64

func (b *BadgerStore) SetUint64(key []byte, val uint64) error

SetUint64 is like Set, but handles uint64 values

func (*BadgerStore) Size

func (b *BadgerStore) Size() (lsm, vlog int64)

func (*BadgerStore) StoreLog

func (b *BadgerStore) StoreLog(log *raft.Log) error

StoreLog is used to store a single raft log

func (*BadgerStore) StoreLogs

func (b *BadgerStore) StoreLogs(logs []*raft.Log) error

StoreLogs is used to store a set of raft logs

type Options

type Options struct {
	// NoSync causes the database to skip fsync calls after each
	// write to the log. This is unsafe, so it should be used
	// with caution.
	NoSync bool

	// MsgpackUseNewTimeFormat when set to true, force the underlying msgpack
	// codec to use the new format of time.Time when encoding (used in
	// go-msgpack v1.1.5 by default). Decoding is not affected, as all
	// go-msgpack v2.1.0+ decoders know how to decode both formats.
	MsgpackUseNewTimeFormat bool
}

Options contains all the configuration used to open the Badger

type Store

type Store interface {
	Close() error
	FirstIndex() (uint64, error)
	LastIndex() (uint64, error)
	GetLog(idx uint64, log *raft.Log) error
	StoreLog(log *raft.Log) error
	StoreLogs(logs []*raft.Log) error
	DeleteRange(min, max uint64) error
	Set(k, v []byte) error
	Get(k []byte) ([]byte, error)
	SetUint64(key []byte, val uint64) error
	GetUint64(key []byte) (uint64, error)
	RunValueLogGC(discardRatio float64) error
	Size() (lsm, vlog int64)
}