mirror of https://github.com/ledisdb/ledisdb.git
180 lines
3.4 KiB
Go
180 lines
3.4 KiB
Go
package store
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import (
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"github.com/siddontang/ledisdb/config"
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"github.com/siddontang/ledisdb/store/driver"
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"sync"
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"time"
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)
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type DB struct {
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db driver.IDB
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name string
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st *Stat
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cfg *config.Config
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lastCommit time.Time
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m sync.Mutex
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}
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func (db *DB) Close() error {
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return db.db.Close()
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}
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func (db *DB) String() string {
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return db.name
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}
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func (db *DB) NewIterator() *Iterator {
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db.st.IterNum.Add(1)
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it := new(Iterator)
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it.it = db.db.NewIterator()
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it.st = db.st
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return it
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}
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func (db *DB) Get(key []byte) ([]byte, error) {
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t := time.Now()
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v, err := db.db.Get(key)
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db.st.statGet(v, err)
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db.st.GetTotalTime.Add(time.Now().Sub(t))
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return v, err
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}
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func (db *DB) Put(key []byte, value []byte) error {
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db.st.PutNum.Add(1)
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if db.needSyncCommit() {
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return db.db.SyncPut(key, value)
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} else {
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return db.db.Put(key, value)
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}
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}
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func (db *DB) Delete(key []byte) error {
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db.st.DeleteNum.Add(1)
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if db.needSyncCommit() {
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return db.db.SyncDelete(key)
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} else {
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return db.db.Delete(key)
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}
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}
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func (db *DB) NewWriteBatch() *WriteBatch {
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db.st.BatchNum.Add(1)
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wb := new(WriteBatch)
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wb.wb = db.db.NewWriteBatch()
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wb.st = db.st
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wb.db = db
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return wb
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}
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func (db *DB) NewSnapshot() (*Snapshot, error) {
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db.st.SnapshotNum.Add(1)
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var err error
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s := &Snapshot{}
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if s.ISnapshot, err = db.db.NewSnapshot(); err != nil {
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return nil, err
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}
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s.st = db.st
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return s, nil
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}
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func (db *DB) Compact() error {
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db.st.CompactNum.Add(1)
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t := time.Now()
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err := db.db.Compact()
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db.st.CompactTotalTime.Add(time.Now().Sub(t))
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return err
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}
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func (db *DB) RangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
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return NewRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
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}
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func (db *DB) RevRangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
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return NewRevRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
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}
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//count < 0, unlimit.
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//
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//offset must >= 0, if < 0, will get nothing.
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func (db *DB) RangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
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return NewRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
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}
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//count < 0, unlimit.
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//
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//offset must >= 0, if < 0, will get nothing.
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func (db *DB) RevRangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
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return NewRevRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
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}
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func (db *DB) Begin() (*Tx, error) {
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tx, err := db.db.Begin()
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if err != nil {
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return nil, err
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}
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db.st.TxNum.Add(1)
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return &Tx{tx, db.st}, nil
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}
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func (db *DB) Stat() *Stat {
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return db.st
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}
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func (db *DB) needSyncCommit() bool {
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if db.cfg.DBSyncCommit == 0 {
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return false
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} else if db.cfg.DBSyncCommit == 2 {
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return true
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} else {
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n := time.Now()
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need := false
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db.m.Lock()
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if n.Sub(db.lastCommit) > time.Second {
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need = true
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}
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db.lastCommit = n
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db.m.Unlock()
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return need
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}
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}
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func (db *DB) GetSlice(key []byte) (Slice, error) {
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if d, ok := db.db.(driver.ISliceGeter); ok {
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t := time.Now()
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v, err := d.GetSlice(key)
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db.st.statGet(v, err)
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db.st.GetTotalTime.Add(time.Now().Sub(t))
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return v, err
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} else {
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v, err := db.Get(key)
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if err != nil {
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return nil, err
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} else if v == nil {
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return nil, nil
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} else {
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return driver.GoSlice(v), nil
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}
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}
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}
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