118 lines
2.0 KiB
Go
118 lines
2.0 KiB
Go
package chain
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import (
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"context"
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block "github.com/ipfs/go-block-format"
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"github.com/ipfs/go-cid"
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ds "github.com/ipfs/go-datastore"
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bstore "github.com/ipfs/go-ipfs-blockstore"
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)
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type BufferedBS struct {
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read bstore.Blockstore
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write bstore.Blockstore
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}
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func NewBufferedBstore(base bstore.Blockstore) *BufferedBS {
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buf := bstore.NewBlockstore(ds.NewMapDatastore())
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return &BufferedBS{
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read: base,
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write: buf,
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}
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}
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var _ (bstore.Blockstore) = &BufferedBS{}
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func (bs *BufferedBS) AllKeysChan(ctx context.Context) (<-chan cid.Cid, error) {
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a, err := bs.read.AllKeysChan(ctx)
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if err != nil {
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return nil, err
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}
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b, err := bs.write.AllKeysChan(ctx)
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if err != nil {
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return nil, err
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}
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out := make(chan cid.Cid)
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go func() {
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defer close(out)
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for a != nil || b != nil {
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select {
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case val, ok := <-a:
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if !ok {
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a = nil
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} else {
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select {
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case out <- val:
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case <-ctx.Done():
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return
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}
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}
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case val, ok := <-b:
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if !ok {
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b = nil
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} else {
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select {
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case out <- val:
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case <-ctx.Done():
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return
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}
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}
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}
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}
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}()
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return out, nil
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}
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func (bs *BufferedBS) DeleteBlock(c cid.Cid) error {
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if err := bs.read.DeleteBlock(c); err != nil {
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return err
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}
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return bs.write.DeleteBlock(c)
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}
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func (bs *BufferedBS) Get(c cid.Cid) (block.Block, error) {
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if out, err := bs.read.Get(c); err != nil {
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if err != bstore.ErrNotFound {
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return nil, err
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}
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} else {
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return out, nil
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}
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return bs.write.Get(c)
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}
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func (bs *BufferedBS) GetSize(c cid.Cid) (int, error) {
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panic("nyi")
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}
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func (bs *BufferedBS) Put(blk block.Block) error {
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return bs.write.Put(blk)
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}
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func (bs *BufferedBS) Has(c cid.Cid) (bool, error) {
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has, err := bs.read.Has(c)
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if err != nil {
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return false, err
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}
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if has {
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return true, nil
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}
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return bs.write.Has(c)
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}
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func (bs *BufferedBS) HashOnRead(hor bool) {
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bs.read.HashOnRead(hor)
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bs.write.HashOnRead(hor)
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}
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func (bs *BufferedBS) PutMany(blks []block.Block) error {
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return bs.write.PutMany(blks)
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}
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