kvdb

package

v0.0.0-...-59da782 Latest Latest Go to latest Published: Jul 30, 2020 License: GPL-3.0, GPL-2.0, GPL-3.0 Imports: 11 Imported by: 0

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Repository

github.com/33cn/chat33

Links

Open Source Insights

README ¶

TODO: syndtr/goleveldb should be replaced with actual LevelDB instance

Documentation ¶

Constants ¶

View Source

const DBBackendLevelDB = "leveldb"

View Source

const DBBackendMemDB = "memdb"

Database types

View Source

const DBBackendRocksDB = "rocksdb"

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type DB ¶

type DB interface {
	Get([]byte) []byte
	Set([]byte, []byte)
	SetSync([]byte, []byte)
	Delete([]byte)
	DeleteSync([]byte)
	Close()
	Query(key string, beg, end, bitSize int64) IQuery
	GetIter(key string, bitSize int64) IQuery
	NewBatch(sync bool) IBatch
	// For debugging
	Print()
}

func NewDB ¶

func NewDB(name string, backend string, dir string) DB

func NewLevelDB ¶

func NewLevelDB(name string) (DB, error)

func NewMemDB ¶

func NewMemDB(path string) (DB, error)

type IBatch ¶

type IBatch interface {
	Put(key, value []byte) error
	Delete(key []byte) error
	Commit() error
}

type IQuery ¶

type IQuery interface {
	Seek(i int64) IQuery
	FetchAll(limit int64, asc bool) (keys [][]byte, vals [][]byte, err error)
	Key() []byte
	Close()
	Error() error
	Value() []byte
	Prev() bool
	Next() bool
}

type LevelDB ¶

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

func (*LevelDB) Close ¶

func (db *LevelDB) Close()

func (*LevelDB) DB ¶

func (db *LevelDB) DB() *leveldb.DB

func (*LevelDB) Delete ¶

func (db *LevelDB) Delete(key []byte)

func (*LevelDB) DeleteSync ¶

func (db *LevelDB) DeleteSync(key []byte)

func (*LevelDB) Get ¶

func (db *LevelDB) Get(key []byte) []byte

func (*LevelDB) GetIter ¶

func (db *LevelDB) GetIter(key string, bitSize int64) IQuery

func (*LevelDB) NewBatch ¶

func (d *LevelDB) NewBatch(sync bool) IBatch

因为是金融系统，这个选项还是有必要，避免发生丢数据的情况而我们设计整个系统尽量采用批量提交，所以性能应该还是可以的

func (*LevelDB) Print ¶

func (db *LevelDB) Print()

func (*LevelDB) Query ¶

func (db *LevelDB) Query(key string, beg, end, bitSize int64) IQuery

func (*LevelDB) Set ¶

func (db *LevelDB) Set(key []byte, value []byte)

func (*LevelDB) SetSync ¶

func (db *LevelDB) SetSync(key []byte, value []byte)

type MemDB ¶

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

func (*MemDB) Close ¶

func (db *MemDB) Close()

func (*MemDB) Delete ¶

func (db *MemDB) Delete(key []byte)

func (*MemDB) DeleteSync ¶

func (db *MemDB) DeleteSync(key []byte)

func (*MemDB) Get ¶

func (db *MemDB) Get(key []byte) []byte

func (*MemDB) GetIter ¶

func (db *MemDB) GetIter(key string, bitSize int64) IQuery

func (*MemDB) NewBatch ¶

func (db *MemDB) NewBatch(sync bool) IBatch

func (*MemDB) Print ¶

func (db *MemDB) Print()

func (*MemDB) Query ¶

func (db *MemDB) Query(key string, beg, end, bitSize int64) IQuery

func (*MemDB) Set ¶

func (db *MemDB) Set(key []byte, value []byte)

func (*MemDB) SetSync ¶

func (db *MemDB) SetSync(key []byte, value []byte)

Source Files ¶

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