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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
|
|
||
| "github.com/ipfs/go-cid" | ||
| format "github.com/ipfs/go-ipld-format" | ||
|
|
||
| blockstore "github.com/ipfs/go-ipfs-blockstore" | ||
| "github.com/ipfs/go-libipfs/blocks" | ||
|
|
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| lru "github.com/hashicorp/golang-lru/v2" | ||
| uatomic "go.uber.org/atomic" | ||
| ) | ||
|
|
||
| func newLruBlockstore(size int) (blockstore.Blockstore, error) { | ||
| c, err := lru.New2Q[string, []byte](size) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &lruBlockstore{ | ||
| cache: c, | ||
| rehash: uatomic.NewBool(false), | ||
| }, nil | ||
| } | ||
|
|
||
| type lruBlockstore struct { | ||
| cache *lru.TwoQueueCache[string, []byte] | ||
| rehash *uatomic.Bool | ||
| } | ||
|
|
||
| func (l *lruBlockstore) DeleteBlock(ctx context.Context, c cid.Cid) error { | ||
| l.cache.Remove(string(c.Hash())) | ||
| return nil | ||
| } | ||
|
|
||
| func (l *lruBlockstore) Has(ctx context.Context, c cid.Cid) (bool, error) { | ||
| return l.cache.Contains(string(c.Hash())), nil | ||
| } | ||
|
|
||
| func (l *lruBlockstore) Get(ctx context.Context, c cid.Cid) (blocks.Block, error) { | ||
| blkData, found := l.cache.Get(string(c.Hash())) | ||
| if !found { | ||
| return nil, format.ErrNotFound{Cid: c} | ||
| } | ||
|
|
||
| if l.rehash.Load() { | ||
| rbcid, err := c.Prefix().Sum(blkData) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if !rbcid.Equals(c) { | ||
| return nil, blockstore.ErrHashMismatch | ||
| } | ||
| } | ||
|
|
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| return blocks.NewBlockWithCid(blkData, c) | ||
| } | ||
|
|
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| func (l *lruBlockstore) GetSize(ctx context.Context, c cid.Cid) (int, error) { | ||
| blkData, found := l.cache.Get(string(c.Hash())) | ||
| if !found { | ||
| return -1, format.ErrNotFound{Cid: c} | ||
| } | ||
|
|
||
| return len(blkData), nil | ||
| } | ||
|
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| func (l *lruBlockstore) Put(ctx context.Context, blk blocks.Block) error { | ||
| l.cache.Add(string(blk.Cid().Hash()), blk.RawData()) | ||
| return nil | ||
| } | ||
|
|
||
| func (l *lruBlockstore) PutMany(ctx context.Context, blks []blocks.Block) error { | ||
| for _, b := range blks { | ||
| if err := l.Put(ctx, b); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (l *lruBlockstore) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) { | ||
| return nil, errors.New("not implemented") | ||
| } | ||
|
|
||
| func (l *lruBlockstore) HashOnRead(enabled bool) { | ||
| l.rehash.Store(enabled) | ||
| } | ||
|
|
||
| var _ blockstore.Blockstore = (*lruBlockstore)(nil) |
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