forked from astaxie/docker-registry
/
db.go
179 lines (140 loc) · 3.37 KB
/
db.go
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package store
import (
"github.com/siddontang/ledisdb/config"
"github.com/siddontang/ledisdb/store/driver"
"sync"
"time"
)
type DB struct {
db driver.IDB
name string
st *Stat
cfg *config.Config
lastCommit time.Time
m sync.Mutex
}
func (db *DB) Close() error {
return db.db.Close()
}
func (db *DB) String() string {
return db.name
}
func (db *DB) NewIterator() *Iterator {
db.st.IterNum.Add(1)
it := new(Iterator)
it.it = db.db.NewIterator()
it.st = db.st
return it
}
func (db *DB) Get(key []byte) ([]byte, error) {
t := time.Now()
v, err := db.db.Get(key)
db.st.statGet(v, err)
db.st.GetTotalTime.Add(time.Now().Sub(t))
return v, err
}
func (db *DB) Put(key []byte, value []byte) error {
db.st.PutNum.Add(1)
if db.needSyncCommit() {
return db.db.SyncPut(key, value)
} else {
return db.db.Put(key, value)
}
}
func (db *DB) Delete(key []byte) error {
db.st.DeleteNum.Add(1)
if db.needSyncCommit() {
return db.db.SyncDelete(key)
} else {
return db.db.Delete(key)
}
}
func (db *DB) NewWriteBatch() *WriteBatch {
db.st.BatchNum.Add(1)
wb := new(WriteBatch)
wb.wb = db.db.NewWriteBatch()
wb.st = db.st
wb.db = db
return wb
}
func (db *DB) NewSnapshot() (*Snapshot, error) {
db.st.SnapshotNum.Add(1)
var err error
s := &Snapshot{}
if s.ISnapshot, err = db.db.NewSnapshot(); err != nil {
return nil, err
}
s.st = db.st
return s, nil
}
func (db *DB) Compact() error {
db.st.CompactNum.Add(1)
t := time.Now()
err := db.db.Compact()
db.st.CompactTotalTime.Add(time.Now().Sub(t))
return err
}
func (db *DB) RangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
return NewRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
}
func (db *DB) RevRangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
return NewRevRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
}
//count < 0, unlimit.
//
//offset must >= 0, if < 0, will get nothing.
func (db *DB) RangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
return NewRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
}
//count < 0, unlimit.
//
//offset must >= 0, if < 0, will get nothing.
func (db *DB) RevRangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
return NewRevRangeLimitIterator(db.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
}
func (db *DB) Begin() (*Tx, error) {
tx, err := db.db.Begin()
if err != nil {
return nil, err
}
db.st.TxNum.Add(1)
return &Tx{tx, db.st}, nil
}
func (db *DB) Stat() *Stat {
return db.st
}
func (db *DB) needSyncCommit() bool {
if db.cfg.DBSyncCommit == 0 {
return false
} else if db.cfg.DBSyncCommit == 2 {
return true
} else {
n := time.Now()
need := false
db.m.Lock()
if n.Sub(db.lastCommit) > time.Second {
need = true
}
db.lastCommit = n
db.m.Unlock()
return need
}
}
func (db *DB) GetSlice(key []byte) (Slice, error) {
if d, ok := db.db.(driver.ISliceGeter); ok {
t := time.Now()
v, err := d.GetSlice(key)
db.st.statGet(v, err)
db.st.GetTotalTime.Add(time.Now().Sub(t))
return v, err
} else {
v, err := db.Get(key)
if err != nil {
return nil, err
} else if v == nil {
return nil, nil
} else {
return driver.GoSlice(v), nil
}
}
}