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