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state_cache.go
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state_cache.go
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/*
* Copyright (C) 2021 The poly network Authors
* This file is part of The poly network library.
*
* The poly network is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The poly network is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the poly network. If not, see <http://www.gnu.org/licenses/>.
*/
package ledgerstore
import (
"github.com/hashicorp/golang-lru"
"github.com/polynetwork/poly/core/states"
)
const (
STATE_CACHE_SIZE = 100000
)
type StateCache struct {
stateCache *lru.ARCCache
}
func NewStateCache() (*StateCache, error) {
stateCache, err := lru.NewARC(STATE_CACHE_SIZE)
if err != nil {
return nil, err
}
return &StateCache{
stateCache: stateCache,
}, nil
}
func (this *StateCache) GetState(key []byte) states.StateValue {
state, ok := this.stateCache.Get(string(key))
if !ok {
return nil
}
return state.(states.StateValue)
}
func (this *StateCache) AddState(key []byte, state states.StateValue) {
this.stateCache.Add(string(key), state)
}
func (this *StateCache) DeleteState(key []byte) {
this.stateCache.Remove(string(key))
}