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lua_script.go
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lua_script.go
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// Copyright 2019-2024 Xu Ruibo (hustxurb@163.com) and Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rstring
import (
"github.com/zuoyebang/bitalostored/stored/engine/bitsdb/bitsdb/base"
"github.com/zuoyebang/bitalostored/stored/engine/bitsdb/bitskv"
"github.com/zuoyebang/bitalostored/stored/engine/bitsdb/btools"
)
func (so *StringObject) GetLuaScript(key []byte) ([]byte, func()) {
if err := btools.CheckKeySize(key); err != nil {
return nil, nil
}
ek, kcloser := base.EncodeMetaKeyForLua(key)
defer kcloser()
script, _, vcloser, err := so.getValueCheckAliveForString(ek)
if err != nil {
return nil, nil
} else {
return script, vcloser
}
}
func (so *StringObject) ExistsLuaScript(key []byte) (int64, error) {
if err := btools.CheckKeySize(key); err != nil {
return 0, err
}
ek, kcloser := base.EncodeMetaKeyForLua(key)
defer kcloser()
mkv, err := so.BaseDb.BaseGetMetaWithoutValue(ek)
if mkv == nil || err != nil {
return 0, err
}
defer base.PutMkvToPool(mkv)
if !mkv.IsAlive() {
return 0, nil
}
return 1, nil
}
func (so *StringObject) SetLuaScript(key, script []byte) error {
if err := btools.CheckValueSize(script); err != nil {
return err
}
ek, ekCloser := base.EncodeMetaKeyForLua(key)
defer ekCloser()
return so.setValueForString(ek, script, 0)
}
func (so *StringObject) FlushLuaScript() error {
wb := so.BaseDb.DB.GetMetaWriteBatchFromPool()
defer so.BaseDb.DB.PutWriteBatchToPool(wb)
minKey, kcloser := base.EncodeMetaKeyForLua(nil)
defer kcloser()
iterOpts := &bitskv.IterOptions{
SlotId: uint32(btools.LuaScriptSlot),
}
it := so.BaseDb.DB.NewIteratorMeta(iterOpts)
defer it.Close()
var n int64
for it.Seek(minKey); it.Valid() && it.ValidForPrefix(minKey); it.Next() {
n++
_ = wb.Delete(it.RawKey())
if so.BaseDb.MetaCache != nil {
so.BaseDb.MetaCache.Delete(it.RawKey())
}
}
if n > 0 {
return wb.Commit()
}
return nil
}
func (so *StringObject) LuaScriptLen() int64 {
minKey, kcloser := base.EncodeMetaKeyForLua(nil)
defer kcloser()
iterOpts := &bitskv.IterOptions{
SlotId: uint32(btools.LuaScriptSlot),
}
it := so.BaseDb.DB.NewIteratorMeta(iterOpts)
defer it.Close()
var n int64
for it.Seek(minKey); it.Valid() && it.ValidForPrefix(minKey); it.Next() {
n++
}
return n
}