67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
|
// Copyright 2016 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 storage
|
||
|
|
|
||
|
|
import "sync"
|
||
|
|
|
||
|
|
/*
|
||
|
|
ChunkStore interface is implemented by :
|
||
|
|
|
||
|
|
- MemStore: a memory cache
|
||
|
|
- DbStore: local disk/db store
|
||
|
|
- LocalStore: a combination (sequence of) memStore and dbStore
|
||
|
|
- NetStore: cloud storage abstraction layer
|
||
|
|
- FakeChunkStore: dummy store which doesn't store anything just implements the interface
|
||
|
|
*/
|
||
|
|
type ChunkStore interface {
|
||
|
|
Put(*Chunk) // effectively there is no error even if there is an error
|
||
|
|
Get(Address) (*Chunk, error)
|
||
|
|
Close()
|
||
|
|
}
|
||
|
|
|
||
|
|
// MapChunkStore is a very simple ChunkStore implementation to store chunks in a map in memory.
|
||
|
|
type MapChunkStore struct {
|
||
|
|
chunks map[string]*Chunk
|
||
|
|
mu sync.RWMutex
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewMapChunkStore() *MapChunkStore {
|
||
|
|
return &MapChunkStore{
|
||
|
|
chunks: make(map[string]*Chunk),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *MapChunkStore) Put(chunk *Chunk) {
|
||
|
|
m.mu.Lock()
|
||
|
|
defer m.mu.Unlock()
|
||
|
|
m.chunks[chunk.Addr.Hex()] = chunk
|
||
|
|
chunk.markAsStored()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *MapChunkStore) Get(addr Address) (*Chunk, error) {
|
||
|
|
m.mu.RLock()
|
||
|
|
defer m.mu.RUnlock()
|
||
|
|
chunk := m.chunks[addr.Hex()]
|
||
|
|
if chunk == nil {
|
||
|
|
return nil, ErrChunkNotFound
|
||
|
|
}
|
||
|
|
return chunk, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m *MapChunkStore) Close() {
|
||
|
|
}
|