forked from mirror/ledisdb
151 lines
2.3 KiB
Go
151 lines
2.3 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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"github.com/siddontang/go-log/log"
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"path"
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"sync"
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)
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type Config struct {
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DataDir string `json:"data_dir"`
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//if you not set leveldb path, use data_dir/data
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DataDB leveldb.Config `json:"data_db"`
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UseBinLog bool `json:"use_bin_log"`
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//if you not set bin log path, use data_dir/bin_log
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BinLog BinLogConfig `json:"bin_log"`
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}
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type DB struct {
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l *Ledis
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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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quit chan struct{}
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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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if len(cfg.DataDir) == 0 {
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return nil, fmt.Errorf("must set correct data_dir")
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}
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if len(cfg.DataDB.Path) == 0 {
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cfg.DataDB.Path = path.Join(cfg.DataDir, "data")
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}
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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.quit = make(chan struct{})
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l.ldb = ldb
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if cfg.UseBinLog {
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if len(cfg.BinLog.Path) == 0 {
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cfg.BinLog.Path = path.Join(cfg.DataDir, "bin_log")
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}
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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.l = l
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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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d.activeExpireCycle()
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return d
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}
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func (l *Ledis) Close() {
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close(l.quit)
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l.ldb.Close()
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if l.binlog != nil {
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l.binlog.Close()
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l.binlog = nil
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}
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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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func (l *Ledis) FlushAll() error {
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for index, db := range l.dbs {
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if _, err := db.FlushAll(); err != nil {
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log.Error("flush db %d error %s", index, err.Error())
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}
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}
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return nil
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}
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//very dangerous to use
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func (l *Ledis) DataDB() *leveldb.DB {
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return l.ldb
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}
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