mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-19 02:53:25 +02:00
388 lines
6.4 KiB
Go
388 lines
6.4 KiB
Go
package nodb
|
|
|
|
import (
|
|
"errors"
|
|
"time"
|
|
)
|
|
|
|
type KVPair struct {
|
|
Key []byte
|
|
Value []byte
|
|
}
|
|
|
|
var errKVKey = errors.New("invalid encode kv key")
|
|
|
|
func checkKeySize(key []byte) error {
|
|
if len(key) > MaxKeySize || len(key) == 0 {
|
|
return errKeySize
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func checkValueSize(value []byte) error {
|
|
if len(value) > MaxValueSize {
|
|
return errValueSize
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (db *DB) encodeKVKey(key []byte) []byte {
|
|
ek := make([]byte, len(key)+2)
|
|
ek[0] = db.index
|
|
ek[1] = KVType
|
|
copy(ek[2:], key)
|
|
return ek
|
|
}
|
|
|
|
func (db *DB) decodeKVKey(ek []byte) ([]byte, error) {
|
|
if len(ek) < 2 || ek[0] != db.index || ek[1] != KVType {
|
|
return nil, errKVKey
|
|
}
|
|
|
|
return ek[2:], nil
|
|
}
|
|
|
|
func (db *DB) encodeKVMinKey() []byte {
|
|
ek := db.encodeKVKey(nil)
|
|
return ek
|
|
}
|
|
|
|
func (db *DB) encodeKVMaxKey() []byte {
|
|
ek := db.encodeKVKey(nil)
|
|
ek[len(ek)-1] = KVType + 1
|
|
return ek
|
|
}
|
|
|
|
func (db *DB) incr(key []byte, delta int64) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
var err error
|
|
key = db.encodeKVKey(key)
|
|
|
|
t := db.kvBatch
|
|
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
var n int64
|
|
n, err = StrInt64(db.bucket.Get(key))
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
n += delta
|
|
|
|
t.Put(key, StrPutInt64(n))
|
|
|
|
//todo binlog
|
|
|
|
err = t.Commit()
|
|
return n, err
|
|
}
|
|
|
|
// ps : here just focus on deleting the key-value data,
|
|
// any other likes expire is ignore.
|
|
func (db *DB) delete(t *batch, key []byte) int64 {
|
|
key = db.encodeKVKey(key)
|
|
t.Delete(key)
|
|
return 1
|
|
}
|
|
|
|
func (db *DB) setExpireAt(key []byte, when int64) (int64, error) {
|
|
t := db.kvBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
if exist, err := db.Exists(key); err != nil || exist == 0 {
|
|
return 0, err
|
|
} else {
|
|
db.expireAt(t, KVType, key, when)
|
|
if err := t.Commit(); err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
return 1, nil
|
|
}
|
|
|
|
func (db *DB) Decr(key []byte) (int64, error) {
|
|
return db.incr(key, -1)
|
|
}
|
|
|
|
func (db *DB) DecrBy(key []byte, decrement int64) (int64, error) {
|
|
return db.incr(key, -decrement)
|
|
}
|
|
|
|
func (db *DB) Del(keys ...[]byte) (int64, error) {
|
|
if len(keys) == 0 {
|
|
return 0, nil
|
|
}
|
|
|
|
codedKeys := make([][]byte, len(keys))
|
|
for i, k := range keys {
|
|
codedKeys[i] = db.encodeKVKey(k)
|
|
}
|
|
|
|
t := db.kvBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
for i, k := range keys {
|
|
t.Delete(codedKeys[i])
|
|
db.rmExpire(t, KVType, k)
|
|
}
|
|
|
|
err := t.Commit()
|
|
return int64(len(keys)), err
|
|
}
|
|
|
|
func (db *DB) Exists(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
var err error
|
|
key = db.encodeKVKey(key)
|
|
|
|
var v []byte
|
|
v, err = db.bucket.Get(key)
|
|
if v != nil && err == nil {
|
|
return 1, nil
|
|
}
|
|
|
|
return 0, err
|
|
}
|
|
|
|
func (db *DB) Get(key []byte) ([]byte, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
key = db.encodeKVKey(key)
|
|
|
|
return db.bucket.Get(key)
|
|
}
|
|
|
|
func (db *DB) GetSet(key []byte, value []byte) ([]byte, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return nil, err
|
|
} else if err := checkValueSize(value); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
key = db.encodeKVKey(key)
|
|
|
|
t := db.kvBatch
|
|
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
oldValue, err := db.bucket.Get(key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
t.Put(key, value)
|
|
//todo, binlog
|
|
|
|
err = t.Commit()
|
|
|
|
return oldValue, err
|
|
}
|
|
|
|
func (db *DB) Incr(key []byte) (int64, error) {
|
|
return db.incr(key, 1)
|
|
}
|
|
|
|
func (db *DB) IncrBy(key []byte, increment int64) (int64, error) {
|
|
return db.incr(key, increment)
|
|
}
|
|
|
|
func (db *DB) MGet(keys ...[]byte) ([][]byte, error) {
|
|
values := make([][]byte, len(keys))
|
|
|
|
it := db.bucket.NewIterator()
|
|
defer it.Close()
|
|
|
|
for i := range keys {
|
|
if err := checkKeySize(keys[i]); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
values[i] = it.Find(db.encodeKVKey(keys[i]))
|
|
}
|
|
|
|
return values, nil
|
|
}
|
|
|
|
func (db *DB) MSet(args ...KVPair) error {
|
|
if len(args) == 0 {
|
|
return nil
|
|
}
|
|
|
|
t := db.kvBatch
|
|
|
|
var err error
|
|
var key []byte
|
|
var value []byte
|
|
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
for i := 0; i < len(args); i++ {
|
|
if err := checkKeySize(args[i].Key); err != nil {
|
|
return err
|
|
} else if err := checkValueSize(args[i].Value); err != nil {
|
|
return err
|
|
}
|
|
|
|
key = db.encodeKVKey(args[i].Key)
|
|
|
|
value = args[i].Value
|
|
|
|
t.Put(key, value)
|
|
|
|
//todo binlog
|
|
}
|
|
|
|
err = t.Commit()
|
|
return err
|
|
}
|
|
|
|
func (db *DB) Set(key []byte, value []byte) error {
|
|
if err := checkKeySize(key); err != nil {
|
|
return err
|
|
} else if err := checkValueSize(value); err != nil {
|
|
return err
|
|
}
|
|
|
|
var err error
|
|
key = db.encodeKVKey(key)
|
|
|
|
t := db.kvBatch
|
|
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
t.Put(key, value)
|
|
|
|
err = t.Commit()
|
|
|
|
return err
|
|
}
|
|
|
|
func (db *DB) SetNX(key []byte, value []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
} else if err := checkValueSize(value); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
var err error
|
|
key = db.encodeKVKey(key)
|
|
|
|
var n int64 = 1
|
|
|
|
t := db.kvBatch
|
|
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
|
|
if v, err := db.bucket.Get(key); err != nil {
|
|
return 0, err
|
|
} else if v != nil {
|
|
n = 0
|
|
} else {
|
|
t.Put(key, value)
|
|
|
|
//todo binlog
|
|
|
|
err = t.Commit()
|
|
}
|
|
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) flush() (drop int64, err error) {
|
|
t := db.kvBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
return db.flushType(t, KVType)
|
|
}
|
|
|
|
//if inclusive is true, scan range [key, inf) else (key, inf)
|
|
func (db *DB) Scan(key []byte, count int, inclusive bool, match string) ([][]byte, error) {
|
|
return db.scan(KVType, key, count, inclusive, match)
|
|
}
|
|
|
|
func (db *DB) Expire(key []byte, duration int64) (int64, error) {
|
|
if duration <= 0 {
|
|
return 0, errExpireValue
|
|
}
|
|
|
|
return db.setExpireAt(key, time.Now().Unix()+duration)
|
|
}
|
|
|
|
func (db *DB) ExpireAt(key []byte, when int64) (int64, error) {
|
|
if when <= time.Now().Unix() {
|
|
return 0, errExpireValue
|
|
}
|
|
|
|
return db.setExpireAt(key, when)
|
|
}
|
|
|
|
func (db *DB) TTL(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
return db.ttl(KVType, key)
|
|
}
|
|
|
|
func (db *DB) Persist(key []byte) (int64, error) {
|
|
if err := checkKeySize(key); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
t := db.kvBatch
|
|
t.Lock()
|
|
defer t.Unlock()
|
|
n, err := db.rmExpire(t, KVType, key)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
err = t.Commit()
|
|
return n, err
|
|
}
|
|
|
|
func (db *DB) Lock() {
|
|
t := db.kvBatch
|
|
t.Lock()
|
|
}
|
|
|
|
func (db *DB) Remove(key []byte) bool {
|
|
if len(key) == 0 {
|
|
return false
|
|
}
|
|
t := db.kvBatch
|
|
t.Delete(db.encodeKVKey(key))
|
|
_, err := db.rmExpire(t, KVType, key)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (db *DB) Commit() error {
|
|
t := db.kvBatch
|
|
return t.Commit()
|
|
}
|
|
|
|
func (db *DB) Unlock() {
|
|
t := db.kvBatch
|
|
t.Unlock()
|
|
}
|