mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-08-22 12:38:06 +02:00
601 lines
10 KiB
Go
601 lines
10 KiB
Go
package nodb
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"time"
|
|
|
|
"github.com/lunny/nodb/store"
|
|
)
|
|
|
|
var errSetKey = errors.New("invalid set key")
|
|
var errSSizeKey = errors.New("invalid ssize key")
|
|
|
|
const (
|
|
setStartSep byte = ':'
|
|
setStopSep byte = setStartSep + 1
|
|
UnionType byte = 51
|
|
DiffType byte = 52
|
|
InterType byte = 53
|
|
)
|
|
|
|
func checkSetKMSize(key []byte, member []byte) error {
|
|
if len(key) > MaxKeySize || len(key) == 0 {
|
|
return errKeySize
|
|
} else if len(member) > MaxSetMemberSize || len(member) == 0 {
|
|
return errSetMemberSize
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (db *DB) sEncodeSizeKey(key []byte) []byte {
|
|
buf := make([]byte, len(key)+2)
|
|
|
|
buf[0] = db.index
|
|
buf[1] = SSizeType
|
|
|
|
copy(buf[2:], key)
|
|
return buf
|
|
}
|
|
|
|
func (db *DB) sDecodeSizeKey(ek []byte) ([]byte, error) {
|
|
if len(ek) < 2 || ek[0] != db.index || ek[1] != SSizeType {
|
|
return nil, errSSizeKey
|
|
}
|
|
|
|
return ek[2:], nil
|
|
}
|
|
|
|
func (db *DB) sEncodeSetKey(key []byte, member []byte) []byte {
|
|
buf := make([]byte, len(key)+len(member)+1+1+2+1)
|
|
|
|
pos := 0
|
|
buf[pos] = db.index
|
|
pos++
|
|
buf[pos] = SetType
|
|
pos++
|
|
|
|
binary.BigEndian.PutUint16(buf[pos:], uint16(len(key)))
|
|
pos += 2
|
|
|
|
copy(buf[pos:], key)
|
|
pos += len(key)
|
|
|
|
buf[pos] = setStartSep
|
|
pos++
|
|
copy(buf[pos:], member)
|
|
|
|
return buf
|
|
}
|
|
|
|
func (db *DB) sDecodeSetKey(ek []byte) ([]byte, []byte, error) {
|
|
if len(ek) < 5 || ek[0] != db.index || ek[1] != SetType {
|
|
return nil, nil, errSetKey
|
|
}
|
|
|
|
pos := 2
|
|
keyLen := int(binary.BigEndian.Uint16(ek[pos:]))
|
|
pos += 2
|
|
|
|
if keyLen+5 > len(ek) {
|
|
return nil, nil, errSetKey
|
|
}
|
|
|
|
key := ek[pos : pos+keyLen]
|
|
pos += keyLen
|
|
|
|
if ek[pos] != hashStartSep {
|
|
return nil, nil, errSetKey
|
|
}
|
|
|
|
pos++
|
|
member := ek[pos:]
|
|
return key, member, nil
|
|
}
|
|
|
|
func (db *DB) sEncodeStartKey(key []byte) []byte {
|
|
return db.sEncodeSetKey(key, nil)
|
|
}
|
|
|
|
func (db *DB) sEncodeStopKey(key []byte) []byte {
|
|
k := db.sEncodeSetKey(key, nil)
|
|
|
|
k[len(k)-1] = setStopSep
|
|
|
|
return k
|
|
}
|
|
|
|
func (db *DB) sFlush() (drop int64, err error) {
|
|
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
return db.flushType(t, SetType)
|
|
}
|
|
|
|
func (db *DB) sDelete(t *batch, key []byte) int64 {
|
|
sk := db.sEncodeSizeKey(key)
|
|
start := db.sEncodeStartKey(key)
|
|
stop := db.sEncodeStopKey(key)
|
|
|
|
var num int64 = 0
|
|
it := db.bucket.RangeLimitIterator(start, stop, store.RangeROpen, 0, -1)
|
|
for ; it.Valid(); it.Next() {
|
|
t.Delete(it.RawKey())
|
|
num++
|
|
}
|
|
|
|
it.Close()
|
|
|
|
t.Delete(sk)
|
|
return num
|
|
}
|
|
|
|
func (db *DB) sIncrSize(key []byte, delta int64) (int64, error) {
|
|
t := db.setBatch
|
|
sk := db.sEncodeSizeKey(key)
|
|
|
|
var err error
|
|
var size int64 = 0
|
|
if size, err = Int64(db.bucket.Get(sk)); err != nil {
|
|
return 0, err
|
|
} else {
|
|
size += delta
|
|
if size <= 0 {
|
|
size = 0
|
|
t.Delete(sk)
|
|
db.rmExpire(t, SetType, key)
|
|
} else {
|
|
t.Put(sk, PutInt64(size))
|
|
}
|
|
}
|
|
|
|
return size, nil
|
|
}
|
|
|
|
func (db *DB) sExpireAt(key []byte, when int64) (int64, error) {
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
if scnt, err := db.SCard(key); err != nil || scnt == 0 {
|
|
return 0, err
|
|
} else {
|
|
db.expireAt(t, SetType, key, when)
|
|
if err := t.Commit(); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
}
|
|
|
|
return 1, nil
|
|
}
|
|
|
|
func (db *DB) sSetItem(key []byte, member []byte) (int64, error) {
|
|
t := db.setBatch
|
|
ek := db.sEncodeSetKey(key, member)
|
|
|
|
var n int64 = 1
|
|
if v, _ := db.bucket.Get(ek); v != nil {
|
|
n = 0
|
|
} else {
|
|
if _, err := db.sIncrSize(key, 1); err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
|
|
t.Put(ek, nil)
|
|
return n, nil
|
|
}
|
|
|
|
func (db *DB) SAdd(key []byte, args ...[]byte) (int64, error) {
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
var err error
|
|
var ek []byte
|
|
var num int64 = 0
|
|
for i := 0; i < len(args); i++ {
|
|
if err := checkSetKMSize(key, args[i]); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
ek = db.sEncodeSetKey(key, args[i])
|
|
|
|
if v, err := db.bucket.Get(ek); err != nil {
|
|
return 0, err
|
|
} else if v == nil {
|
|
num++
|
|
}
|
|
|
|
t.Put(ek, nil)
|
|
}
|
|
|
|
if _, err = db.sIncrSize(key, num); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
err = t.Commit()
|
|
return num, err
|
|
|
|
}
|
|
|
|
func (db *DB) SCard(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
sk := db.sEncodeSizeKey(key)
|
|
|
|
return Int64(db.bucket.Get(sk))
|
|
}
|
|
|
|
func (db *DB) sDiffGeneric(keys ...[]byte) ([][]byte, error) {
|
|
destMap := make(map[string]bool)
|
|
|
|
members, err := db.SMembers(keys[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, m := range members {
|
|
destMap[String(m)] = true
|
|
}
|
|
|
|
for _, k := range keys[1:] {
|
|
members, err := db.SMembers(k)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, m := range members {
|
|
if _, ok := destMap[String(m)]; !ok {
|
|
continue
|
|
} else if ok {
|
|
delete(destMap, String(m))
|
|
}
|
|
}
|
|
// O - A = O, O is zero set.
|
|
if len(destMap) == 0 {
|
|
return nil, nil
|
|
}
|
|
}
|
|
|
|
slice := make([][]byte, len(destMap))
|
|
idx := 0
|
|
for k, v := range destMap {
|
|
if !v {
|
|
continue
|
|
}
|
|
slice[idx] = []byte(k)
|
|
idx++
|
|
}
|
|
|
|
return slice, nil
|
|
}
|
|
|
|
func (db *DB) SDiff(keys ...[]byte) ([][]byte, error) {
|
|
v, err := db.sDiffGeneric(keys...)
|
|
return v, err
|
|
}
|
|
|
|
func (db *DB) SDiffStore(dstKey []byte, keys ...[]byte) (int64, error) {
|
|
n, err := db.sStoreGeneric(dstKey, DiffType, keys...)
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) sInterGeneric(keys ...[]byte) ([][]byte, error) {
|
|
destMap := make(map[string]bool)
|
|
|
|
members, err := db.SMembers(keys[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, m := range members {
|
|
destMap[String(m)] = true
|
|
}
|
|
|
|
for _, key := range keys[1:] {
|
|
if err := checkKeySize(key); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
members, err := db.SMembers(key)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if len(members) == 0 {
|
|
return nil, err
|
|
}
|
|
|
|
tempMap := make(map[string]bool)
|
|
for _, member := range members {
|
|
if err := checkKeySize(member); err != nil {
|
|
return nil, err
|
|
}
|
|
if _, ok := destMap[String(member)]; ok {
|
|
tempMap[String(member)] = true //mark this item as selected
|
|
}
|
|
}
|
|
destMap = tempMap //reduce the size of the result set
|
|
if len(destMap) == 0 {
|
|
return nil, nil
|
|
}
|
|
}
|
|
|
|
slice := make([][]byte, len(destMap))
|
|
idx := 0
|
|
for k, v := range destMap {
|
|
if !v {
|
|
continue
|
|
}
|
|
|
|
slice[idx] = []byte(k)
|
|
idx++
|
|
}
|
|
|
|
return slice, nil
|
|
|
|
}
|
|
|
|
func (db *DB) SInter(keys ...[]byte) ([][]byte, error) {
|
|
v, err := db.sInterGeneric(keys...)
|
|
return v, err
|
|
|
|
}
|
|
|
|
func (db *DB) SInterStore(dstKey []byte, keys ...[]byte) (int64, error) {
|
|
n, err := db.sStoreGeneric(dstKey, InterType, keys...)
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) SIsMember(key []byte, member []byte) (int64, error) {
|
|
ek := db.sEncodeSetKey(key, member)
|
|
|
|
var n int64 = 1
|
|
if v, err := db.bucket.Get(ek); err != nil {
|
|
return 0, err
|
|
} else if v == nil {
|
|
n = 0
|
|
}
|
|
return n, nil
|
|
}
|
|
|
|
func (db *DB) SMembers(key []byte) ([][]byte, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
start := db.sEncodeStartKey(key)
|
|
stop := db.sEncodeStopKey(key)
|
|
|
|
v := make([][]byte, 0, 16)
|
|
|
|
it := db.bucket.RangeLimitIterator(start, stop, store.RangeROpen, 0, -1)
|
|
for ; it.Valid(); it.Next() {
|
|
_, m, err := db.sDecodeSetKey(it.Key())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
v = append(v, m)
|
|
}
|
|
|
|
it.Close()
|
|
|
|
return v, nil
|
|
}
|
|
|
|
func (db *DB) SRem(key []byte, args ...[]byte) (int64, error) {
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
var ek []byte
|
|
var v []byte
|
|
var err error
|
|
|
|
it := db.bucket.NewIterator()
|
|
defer it.Close()
|
|
|
|
var num int64 = 0
|
|
for i := 0; i < len(args); i++ {
|
|
if err := checkSetKMSize(key, args[i]); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
ek = db.sEncodeSetKey(key, args[i])
|
|
|
|
v = it.RawFind(ek)
|
|
if v == nil {
|
|
continue
|
|
} else {
|
|
num++
|
|
t.Delete(ek)
|
|
}
|
|
}
|
|
|
|
if _, err = db.sIncrSize(key, -num); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
err = t.Commit()
|
|
return num, err
|
|
|
|
}
|
|
|
|
func (db *DB) sUnionGeneric(keys ...[]byte) ([][]byte, error) {
|
|
dstMap := make(map[string]bool)
|
|
|
|
for _, key := range keys {
|
|
if err := checkKeySize(key); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
members, err := db.SMembers(key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, member := range members {
|
|
dstMap[String(member)] = true
|
|
}
|
|
}
|
|
|
|
slice := make([][]byte, len(dstMap))
|
|
idx := 0
|
|
for k, v := range dstMap {
|
|
if !v {
|
|
continue
|
|
}
|
|
slice[idx] = []byte(k)
|
|
idx++
|
|
}
|
|
|
|
return slice, nil
|
|
}
|
|
|
|
func (db *DB) SUnion(keys ...[]byte) ([][]byte, error) {
|
|
v, err := db.sUnionGeneric(keys...)
|
|
return v, err
|
|
}
|
|
|
|
func (db *DB) SUnionStore(dstKey []byte, keys ...[]byte) (int64, error) {
|
|
n, err := db.sStoreGeneric(dstKey, UnionType, keys...)
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) sStoreGeneric(dstKey []byte, optType byte, keys ...[]byte) (int64, error) {
|
|
if err := checkKeySize(dstKey); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
db.sDelete(t, dstKey)
|
|
|
|
var err error
|
|
var ek []byte
|
|
var v [][]byte
|
|
|
|
switch optType {
|
|
case UnionType:
|
|
v, err = db.sUnionGeneric(keys...)
|
|
case DiffType:
|
|
v, err = db.sDiffGeneric(keys...)
|
|
case InterType:
|
|
v, err = db.sInterGeneric(keys...)
|
|
}
|
|
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
for _, m := range v {
|
|
if err := checkSetKMSize(dstKey, m); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
ek = db.sEncodeSetKey(dstKey, m)
|
|
|
|
if _, err := db.bucket.Get(ek); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
t.Put(ek, nil)
|
|
}
|
|
|
|
var num = int64(len(v))
|
|
sk := db.sEncodeSizeKey(dstKey)
|
|
t.Put(sk, PutInt64(num))
|
|
|
|
if err = t.Commit(); err != nil {
|
|
return 0, err
|
|
}
|
|
return num, nil
|
|
}
|
|
|
|
func (db *DB) SClear(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
num := db.sDelete(t, key)
|
|
db.rmExpire(t, SetType, key)
|
|
|
|
err := t.Commit()
|
|
return num, err
|
|
}
|
|
|
|
func (db *DB) SMclear(keys ...[]byte) (int64, error) {
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
for _, key := range keys {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
db.sDelete(t, key)
|
|
db.rmExpire(t, SetType, key)
|
|
}
|
|
|
|
err := t.Commit()
|
|
return int64(len(keys)), err
|
|
}
|
|
|
|
func (db *DB) SExpire(key []byte, duration int64) (int64, error) {
|
|
if duration <= 0 {
|
|
return 0, errExpireValue
|
|
}
|
|
|
|
return db.sExpireAt(key, time.Now().Unix()+duration)
|
|
|
|
}
|
|
|
|
func (db *DB) SExpireAt(key []byte, when int64) (int64, error) {
|
|
if when <= time.Now().Unix() {
|
|
return 0, errExpireValue
|
|
}
|
|
|
|
return db.sExpireAt(key, when)
|
|
|
|
}
|
|
|
|
func (db *DB) STTL(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
return db.ttl(SetType, key)
|
|
}
|
|
|
|
func (db *DB) SPersist(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
t := db.setBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
n, err := db.rmExpire(t, SetType, key)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
err = t.Commit()
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) SScan(key []byte, count int, inclusive bool, match string) ([][]byte, error) {
|
|
return db.scan(SSizeType, key, count, inclusive, match)
|
|
}
|