forked from mirror/ledisdb
99 lines
1.4 KiB
Go
99 lines
1.4 KiB
Go
package ledis
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import (
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"encoding/json"
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"fmt"
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"github.com/siddontang/go-leveldb/leveldb"
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"sync"
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)
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type Config struct {
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DataDB leveldb.Config `json:"data_db"`
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BinLog BinLogConfig `json:"binlog"`
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}
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type DB struct {
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db *leveldb.DB
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index uint8
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kvTx *tx
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listTx *tx
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hashTx *tx
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zsetTx *tx
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}
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type Ledis struct {
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sync.Mutex
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cfg *Config
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ldb *leveldb.DB
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dbs [MaxDBNumber]*DB
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binlog *BinLog
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}
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func Open(configJson json.RawMessage) (*Ledis, error) {
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var cfg Config
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if err := json.Unmarshal(configJson, &cfg); err != nil {
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return nil, err
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}
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return OpenWithConfig(&cfg)
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}
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func OpenWithConfig(cfg *Config) (*Ledis, error) {
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ldb, err := leveldb.OpenWithConfig(&cfg.DataDB)
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if err != nil {
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return nil, err
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}
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l := new(Ledis)
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l.ldb = ldb
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if len(cfg.BinLog.Path) > 0 {
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l.binlog, err = NewBinLogWithConfig(&cfg.BinLog)
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if err != nil {
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return nil, err
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}
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} else {
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l.binlog = nil
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}
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for i := uint8(0); i < MaxDBNumber; i++ {
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l.dbs[i] = newDB(l, i)
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}
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return l, nil
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}
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func newDB(l *Ledis, index uint8) *DB {
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d := new(DB)
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d.db = l.ldb
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d.index = index
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d.kvTx = newTx(l)
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d.listTx = newTx(l)
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d.hashTx = newTx(l)
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d.zsetTx = newTx(l)
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return d
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}
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func (l *Ledis) Close() {
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l.ldb.Close()
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}
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func (l *Ledis) Select(index int) (*DB, error) {
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if index < 0 || index >= int(MaxDBNumber) {
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return nil, fmt.Errorf("invalid db index %d", index)
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}
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return l.dbs[index], nil
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}
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