forked from mirror/ledisdb
488 lines
9.5 KiB
Go
488 lines
9.5 KiB
Go
package ledis
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"errors"
|
|
"github.com/siddontang/golib/hack"
|
|
"github.com/siddontang/golib/leveldb"
|
|
"strconv"
|
|
)
|
|
|
|
var errZSizeKey = errors.New("invalid zsize key")
|
|
var errZSetKey = errors.New("invalid zset key")
|
|
var errZScoreKey = errors.New("invalid zscore key")
|
|
|
|
const (
|
|
zsetNScoreSep byte = '<'
|
|
zsetPScoreSep byte = zsetNScoreSep + 1
|
|
zsetStopScoreSep byte = zsetPScoreSep + 1
|
|
|
|
zsetStartMemSep byte = ':'
|
|
zsetStopMemSep byte = zsetStartMemSep + 1
|
|
)
|
|
|
|
func encode_zsize_key(key []byte) []byte {
|
|
buf := make([]byte, len(key)+1)
|
|
buf[0] = ZSIZE_TYPE
|
|
|
|
copy(buf[1:], key)
|
|
return buf
|
|
}
|
|
|
|
func decode_zsize_key(ek []byte) ([]byte, error) {
|
|
if len(ek) == 0 || ek[0] != ZSIZE_TYPE {
|
|
return nil, errZSizeKey
|
|
}
|
|
|
|
return ek[1:], nil
|
|
}
|
|
|
|
func encode_zset_key(key []byte, member []byte) []byte {
|
|
buf := make([]byte, len(key)+len(member)+5)
|
|
|
|
pos := 0
|
|
buf[pos] = ZSET_TYPE
|
|
pos++
|
|
|
|
binary.BigEndian.PutUint32(buf[pos:], uint32(len(key)))
|
|
pos += 4
|
|
|
|
copy(buf[pos:], key)
|
|
pos += len(key)
|
|
|
|
copy(buf[pos:], member)
|
|
|
|
return buf
|
|
}
|
|
|
|
func decode_zset_key(ek []byte) ([]byte, []byte, error) {
|
|
if len(ek) < 5 || ek[0] != ZSET_TYPE {
|
|
return nil, nil, errZSetKey
|
|
}
|
|
|
|
keyLen := int(binary.BigEndian.Uint32(ek[1:]))
|
|
if keyLen+5 > len(ek) {
|
|
return nil, nil, errZSetKey
|
|
}
|
|
|
|
key := ek[5 : 5+keyLen]
|
|
member := ek[5+keyLen:]
|
|
return key, member, nil
|
|
}
|
|
|
|
func encode_zscore_key(key []byte, member []byte, score int64) []byte {
|
|
buf := make([]byte, len(key)+len(member)+15)
|
|
|
|
pos := 0
|
|
buf[pos] = ZSCORE_TYPE
|
|
pos++
|
|
|
|
binary.BigEndian.PutUint32(buf[pos:], uint32(len(key)))
|
|
pos += 4
|
|
|
|
copy(buf[pos:], key)
|
|
pos += len(key)
|
|
|
|
if score < 0 {
|
|
buf[pos] = zsetNScoreSep
|
|
} else {
|
|
buf[pos] = zsetPScoreSep
|
|
}
|
|
|
|
pos++
|
|
binary.BigEndian.PutUint64(buf[pos:], uint64(score))
|
|
pos += 8
|
|
|
|
buf[pos] = zsetStartMemSep
|
|
pos++
|
|
|
|
copy(buf[pos:], member)
|
|
return buf
|
|
}
|
|
|
|
func encode_start_zscore_key(key []byte, score int64) []byte {
|
|
k := encode_zscore_key(key, nil, score)
|
|
return k
|
|
}
|
|
|
|
func encode_stop_zscore_key(key []byte, score int64) []byte {
|
|
k := encode_zscore_key(key, nil, score)
|
|
k[len(k)-1] = zsetStopMemSep
|
|
return k
|
|
}
|
|
|
|
func decode_zscore_key(ek []byte) (key []byte, member []byte, score int64, err error) {
|
|
if len(ek) < 15 || ek[0] != ZSCORE_TYPE {
|
|
err = errZScoreKey
|
|
return
|
|
}
|
|
|
|
keyLen := int(binary.BigEndian.Uint32(ek[1:]))
|
|
if keyLen+14 > len(ek) {
|
|
err = errZScoreKey
|
|
return
|
|
}
|
|
|
|
key = ek[5 : 5+keyLen]
|
|
pos := 5 + keyLen
|
|
|
|
if (ek[pos] != zsetNScoreSep) && (ek[pos] != zsetPScoreSep) {
|
|
err = errZScoreKey
|
|
return
|
|
}
|
|
pos++
|
|
|
|
score = int64(binary.BigEndian.Uint64(ek[pos:]))
|
|
pos += 8
|
|
|
|
if ek[pos] != zsetStartMemSep {
|
|
err = errZScoreKey
|
|
return
|
|
}
|
|
|
|
pos++
|
|
|
|
member = ek[pos:]
|
|
return
|
|
}
|
|
|
|
func (a *App) zset_setItem(key []byte, score int64, member []byte) (int64, error) {
|
|
if score <= MinScore || score >= MaxScore {
|
|
return 0, errScoreOverflow
|
|
}
|
|
|
|
t := a.zsetTx
|
|
|
|
var exists int64 = 0
|
|
ek := encode_zset_key(key, member)
|
|
if v, err := a.db.Get(ek); err != nil {
|
|
return 0, err
|
|
} else if v != nil {
|
|
exists = 1
|
|
|
|
if s, err := Int64(v, err); err != nil {
|
|
return 0, err
|
|
} else {
|
|
sk := encode_zscore_key(key, member, s)
|
|
t.Delete(sk)
|
|
}
|
|
}
|
|
|
|
t.Put(ek, PutInt64(score))
|
|
|
|
sk := encode_zscore_key(key, member, score)
|
|
t.Put(sk, []byte{})
|
|
|
|
return exists, nil
|
|
}
|
|
|
|
func (a *App) zset_delItem(key []byte, member []byte, skipDelScore bool) (int64, error) {
|
|
t := a.zsetTx
|
|
|
|
ek := encode_zset_key(key, member)
|
|
if v, err := a.db.Get(ek); err != nil {
|
|
return 0, err
|
|
} else if v == nil {
|
|
//not exists
|
|
return 0, nil
|
|
} else {
|
|
//exists
|
|
if !skipDelScore {
|
|
//we must del score
|
|
if s, err := Int64(v, err); err != nil {
|
|
return 0, err
|
|
} else {
|
|
sk := encode_zscore_key(key, member, s)
|
|
t.Delete(sk)
|
|
}
|
|
}
|
|
}
|
|
|
|
t.Delete(ek)
|
|
return 1, nil
|
|
}
|
|
|
|
func (a *App) zset_add(key []byte, args []interface{}) (int64, error) {
|
|
t := a.zsetTx
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
var num int64 = 0
|
|
for i := 0; i < len(args); i += 2 {
|
|
score := args[i].(int64)
|
|
member := args[i+1].([]byte)
|
|
|
|
if n, err := a.zset_setItem(key, score, member); err != nil {
|
|
return 0, err
|
|
} else if n == 0 {
|
|
//add new
|
|
num++
|
|
}
|
|
}
|
|
|
|
if _, err := a.zset_incrSize(key, num); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
//todo add binlog
|
|
err := t.Commit()
|
|
return num, err
|
|
}
|
|
|
|
func (a *App) zset_incrSize(key []byte, delta int64) (int64, error) {
|
|
t := a.zsetTx
|
|
sk := encode_zsize_key(key)
|
|
size, err := Int64(a.db.Get(sk))
|
|
if err != nil {
|
|
return 0, err
|
|
} else {
|
|
size += delta
|
|
if size <= 0 {
|
|
size = 0
|
|
t.Delete(sk)
|
|
} else {
|
|
t.Put(sk, PutInt64(size))
|
|
}
|
|
}
|
|
|
|
return size, nil
|
|
}
|
|
|
|
func (a *App) zset_card(key []byte) (int64, error) {
|
|
sk := encode_zsize_key(key)
|
|
size, err := Int64(a.db.Get(sk))
|
|
return size, err
|
|
}
|
|
|
|
func (a *App) zset_score(key []byte, member []byte) ([]byte, error) {
|
|
k := encode_zset_key(key, member)
|
|
score, err := Int64(a.db.Get(k))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return hack.Slice(strconv.FormatInt(score, 10)), nil
|
|
}
|
|
|
|
func (a *App) zset_rem(key []byte, args [][]byte) (int64, error) {
|
|
t := a.zsetTx
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
var num int64 = 0
|
|
for i := 0; i < len(args); i++ {
|
|
if n, err := a.zset_delItem(key, args[i], false); err != nil {
|
|
return 0, err
|
|
} else if n == 1 {
|
|
num++
|
|
}
|
|
}
|
|
|
|
if _, err := a.zset_incrSize(key, -num); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
err := t.Commit()
|
|
return num, err
|
|
}
|
|
|
|
func (a *App) zset_incrby(key []byte, delta int64, member []byte) ([]byte, error) {
|
|
t := a.zsetTx
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
ek := encode_zset_key(key, member)
|
|
var score int64 = delta
|
|
v, err := a.db.Get(ek)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if v != nil {
|
|
if s, err := Int64(v, err); err != nil {
|
|
return nil, err
|
|
} else {
|
|
sk := encode_zscore_key(key, member, s)
|
|
t.Delete(sk)
|
|
|
|
score = s + delta
|
|
|
|
if score >= MaxScore || score <= MinScore {
|
|
return nil, errScoreOverflow
|
|
}
|
|
}
|
|
} else {
|
|
a.zset_incrSize(key, 1)
|
|
}
|
|
|
|
t.Put(ek, PutInt64(score))
|
|
|
|
t.Put(encode_zscore_key(key, member, score), []byte{})
|
|
|
|
err = t.Commit()
|
|
return hack.Slice(strconv.FormatInt(score, 10)), err
|
|
}
|
|
|
|
func (a *App) zset_count(key []byte, min int64, max int64) (int64, error) {
|
|
minKey := encode_start_zscore_key(key, min)
|
|
maxKey := encode_stop_zscore_key(key, max)
|
|
|
|
rangeType := leveldb.RangeROpen
|
|
|
|
it := a.db.Iterator(minKey, maxKey, rangeType, 0, -1)
|
|
var n int64 = 0
|
|
for ; it.Valid(); it.Next() {
|
|
n++
|
|
}
|
|
it.Close()
|
|
|
|
return n, nil
|
|
}
|
|
|
|
func (a *App) zset_rank(key []byte, member []byte, reverse bool) (int64, error) {
|
|
k := encode_zset_key(key, member)
|
|
|
|
if v, err := a.db.Get(k); err != nil {
|
|
return 0, err
|
|
} else if v == nil {
|
|
return -1, nil
|
|
} else {
|
|
if s, err := Int64(v, err); err != nil {
|
|
return 0, err
|
|
} else {
|
|
var it *leveldb.Iterator
|
|
|
|
sk := encode_zscore_key(key, member, s)
|
|
|
|
if !reverse {
|
|
minKey := encode_start_zscore_key(key, MinScore)
|
|
it = a.db.Iterator(minKey, sk, leveldb.RangeClose, 0, -1)
|
|
} else {
|
|
maxKey := encode_stop_zscore_key(key, MaxScore)
|
|
it = a.db.RevIterator(sk, maxKey, leveldb.RangeClose, 0, -1)
|
|
}
|
|
|
|
var lastKey []byte = nil
|
|
var n int64 = 0
|
|
|
|
for ; it.Valid(); it.Next() {
|
|
n++
|
|
|
|
lastKey = it.Key()
|
|
}
|
|
|
|
it.Close()
|
|
|
|
if _, m, _, err := decode_zscore_key(lastKey); err == nil && bytes.Equal(m, member) {
|
|
n--
|
|
return n, nil
|
|
}
|
|
}
|
|
}
|
|
|
|
return -1, nil
|
|
}
|
|
|
|
func (a *App) zset_iterator(key []byte, min int64, max int64, offset int, limit int, reverse bool) *leveldb.Iterator {
|
|
minKey := encode_start_zscore_key(key, min)
|
|
maxKey := encode_stop_zscore_key(key, max)
|
|
|
|
if !reverse {
|
|
return a.db.Iterator(minKey, maxKey, leveldb.RangeClose, offset, limit)
|
|
} else {
|
|
return a.db.RevIterator(minKey, maxKey, leveldb.RangeClose, offset, limit)
|
|
}
|
|
}
|
|
|
|
func (a *App) zset_remRange(key []byte, min int64, max int64, offset int, limit int) (int64, error) {
|
|
t := a.zsetTx
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
it := a.zset_iterator(key, min, max, offset, limit, false)
|
|
var num int64 = 0
|
|
for ; it.Valid(); it.Next() {
|
|
k := it.Key()
|
|
_, m, _, err := decode_zscore_key(k)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
if n, err := a.zset_delItem(key, m, true); err != nil {
|
|
return 0, err
|
|
} else if n == 1 {
|
|
num++
|
|
}
|
|
|
|
t.Delete(k)
|
|
}
|
|
|
|
if _, err := a.zset_incrSize(key, -num); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
//todo add binlog
|
|
|
|
err := t.Commit()
|
|
return num, err
|
|
}
|
|
|
|
func (a *App) zset_reverse(s []interface{}, withScores bool) []interface{} {
|
|
if withScores {
|
|
for i, j := 0, len(s)-2; i < j; i, j = i+2, j-2 {
|
|
s[i], s[j] = s[j], s[i]
|
|
s[i+1], s[j+1] = s[j+1], s[i+1]
|
|
}
|
|
} else {
|
|
for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
|
|
s[i], s[j] = s[j], s[i]
|
|
}
|
|
}
|
|
|
|
return s
|
|
}
|
|
|
|
func (a *App) zset_range(key []byte, min int64, max int64, withScores bool, offset int, limit int, reverse bool) ([]interface{}, error) {
|
|
nv := 64
|
|
if limit > 0 {
|
|
nv = limit
|
|
}
|
|
if withScores {
|
|
nv = 2 * nv
|
|
}
|
|
v := make([]interface{}, 0, nv)
|
|
|
|
var it *leveldb.Iterator
|
|
|
|
//if reverse and offset is 0, limit < 0, we may use forward iterator then reverse
|
|
//because leveldb iterator prev is slower than next
|
|
if !reverse || (offset == 0 && limit < 0) {
|
|
it = a.zset_iterator(key, min, max, offset, limit, false)
|
|
} else {
|
|
it = a.zset_iterator(key, min, max, offset, limit, true)
|
|
}
|
|
|
|
for ; it.Valid(); it.Next() {
|
|
_, m, s, err := decode_zscore_key(it.Key())
|
|
//may be we will check key equal?
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
v = append(v, m)
|
|
|
|
if withScores {
|
|
v = append(v, hack.Slice(strconv.FormatInt(s, 10)))
|
|
}
|
|
}
|
|
|
|
if reverse && (offset == 0 && limit < 0) {
|
|
v = a.zset_reverse(v, withScores)
|
|
}
|
|
|
|
return v, nil
|
|
}
|
|
|
|
func (a *App) zset_clear(key []byte) (int64, error) {
|
|
return a.zset_remRange(key, MinScore, MaxScore, 0, -1)
|
|
}
|