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db.go
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db.go
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package store
import (
"github.com/siddontang/ledisdb/store/driver"
)
type DB struct {
db driver.IDB
}
// Close database
//
// Caveat
// Any other DB operations like Get, Put, etc... may cause a panic after Close
//
func (db *DB) Close() error {
if db.db == nil {
return nil
}
err := db.db.Close()
db.db = nil
return err
}
// Get Value with Key
func (db *DB) Get(key []byte) ([]byte, error) {
return db.db.Get(key)
}
// Put value with key
func (db *DB) Put(key []byte, value []byte) error {
err := db.db.Put(key, value)
return err
}
// Delete by key
func (db *DB) Delete(key []byte) error {
err := db.db.Delete(key)
return err
}
func (db *DB) NewIterator() *Iterator {
it := new(Iterator)
it.it = db.db.NewIterator()
return it
}
func (db *DB) NewWriteBatch() *WriteBatch {
return &WriteBatch{db.db.NewWriteBatch()}
}
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})
}