mirror of https://github.com/ethereum/go-ethereum
swarm/state: refactor InmemoryStore (#18143)
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3fd87f2193
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4c181e4fb9
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package state |
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import ( |
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"encoding" |
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"encoding/json" |
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"sync" |
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) |
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// InmemoryStore is the reference implementation of Store interface that is supposed
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// to be used in tests.
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type InmemoryStore struct { |
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db map[string][]byte |
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mu sync.RWMutex |
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} |
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// NewInmemoryStore returns a new instance of InmemoryStore.
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func NewInmemoryStore() *InmemoryStore { |
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return &InmemoryStore{ |
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db: make(map[string][]byte), |
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} |
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} |
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// Get retrieves a value stored for a specific key. If there is no value found,
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// ErrNotFound is returned.
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func (s *InmemoryStore) Get(key string, i interface{}) (err error) { |
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s.mu.RLock() |
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defer s.mu.RUnlock() |
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bytes, ok := s.db[key] |
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if !ok { |
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return ErrNotFound |
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} |
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unmarshaler, ok := i.(encoding.BinaryUnmarshaler) |
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if !ok { |
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return json.Unmarshal(bytes, i) |
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} |
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return unmarshaler.UnmarshalBinary(bytes) |
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} |
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// Put stores a value for a specific key.
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func (s *InmemoryStore) Put(key string, i interface{}) (err error) { |
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s.mu.Lock() |
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defer s.mu.Unlock() |
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var bytes []byte |
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marshaler, ok := i.(encoding.BinaryMarshaler) |
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if !ok { |
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if bytes, err = json.Marshal(i); err != nil { |
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return err |
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} |
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} else { |
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if bytes, err = marshaler.MarshalBinary(); err != nil { |
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return err |
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} |
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} |
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s.db[key] = bytes |
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return nil |
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} |
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// Delete removes value stored under a specific key.
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func (s *InmemoryStore) Delete(key string) (err error) { |
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s.mu.Lock() |
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defer s.mu.Unlock() |
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if _, ok := s.db[key]; !ok { |
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return ErrNotFound |
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} |
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delete(s.db, key) |
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return nil |
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} |
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// Close does not do anything.
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func (s *InmemoryStore) Close() error { |
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return nil |
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} |
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@ -1,26 +0,0 @@ |
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// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
|
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
|
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
|
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package state |
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// Store defines methods required to get, set, delete values for different keys
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// and close the underlying resources.
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type Store interface { |
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Get(key string, i interface{}) (err error) |
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Put(key string, i interface{}) (err error) |
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Delete(key string) (err error) |
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Close() error |
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} |
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