cf3b187bde
* swarm, cmd/swarm: address ineffectual assignments * swarm/network: remove unused vars from testHandshake * swarm/storage/feed: revert cursor changes
95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library 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 go-ethereum library 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package state
|
|
|
|
import (
|
|
"encoding"
|
|
"encoding/json"
|
|
"sync"
|
|
)
|
|
|
|
// InmemoryStore is the reference implementation of Store interface that is supposed
|
|
// to be used in tests.
|
|
type InmemoryStore struct {
|
|
db map[string][]byte
|
|
mu sync.RWMutex
|
|
}
|
|
|
|
// NewInmemoryStore returns a new instance of InmemoryStore.
|
|
func NewInmemoryStore() *InmemoryStore {
|
|
return &InmemoryStore{
|
|
db: make(map[string][]byte),
|
|
}
|
|
}
|
|
|
|
// Get retrieves a value stored for a specific key. If there is no value found,
|
|
// ErrNotFound is returned.
|
|
func (s *InmemoryStore) Get(key string, i interface{}) (err error) {
|
|
s.mu.RLock()
|
|
defer s.mu.RUnlock()
|
|
|
|
bytes, ok := s.db[key]
|
|
if !ok {
|
|
return ErrNotFound
|
|
}
|
|
|
|
unmarshaler, ok := i.(encoding.BinaryUnmarshaler)
|
|
if !ok {
|
|
return json.Unmarshal(bytes, i)
|
|
}
|
|
|
|
return unmarshaler.UnmarshalBinary(bytes)
|
|
}
|
|
|
|
// Put stores a value for a specific key.
|
|
func (s *InmemoryStore) Put(key string, i interface{}) (err error) {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
var bytes []byte
|
|
|
|
marshaler, ok := i.(encoding.BinaryMarshaler)
|
|
if !ok {
|
|
if bytes, err = json.Marshal(i); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if bytes, err = marshaler.MarshalBinary(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
s.db[key] = bytes
|
|
return nil
|
|
}
|
|
|
|
// Delete removes value stored under a specific key.
|
|
func (s *InmemoryStore) Delete(key string) (err error) {
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
|
|
if _, ok := s.db[key]; !ok {
|
|
return ErrNotFound
|
|
}
|
|
delete(s.db, key)
|
|
return nil
|
|
}
|
|
|
|
// Close does not do anything.
|
|
func (s *InmemoryStore) Close() error {
|
|
return nil
|
|
}
|