refac(bitswap) use blockstore

bitswap/bitswap.go

@@ -11,6 +11,7 @@ import (
 	bsnet "github.com/jbenet/go-ipfs/bitswap/network"
 	notifications "github.com/jbenet/go-ipfs/bitswap/notifications"
 	blocks "github.com/jbenet/go-ipfs/blocks"
+	blockstore "github.com/jbenet/go-ipfs/blockstore"
 	peer "github.com/jbenet/go-ipfs/peer"
 	routing "github.com/jbenet/go-ipfs/routing"
 	u "github.com/jbenet/go-ipfs/util"
@@ -35,8 +36,8 @@ type BitSwap struct {
 	// sender delivers messages on behalf of the session
 	sender bsnet.NetworkAdapter
 
-	// datastore is the local database // Ledgers of known
-	datastore ds.Datastore
+	// blockstore is the local database
+	blockstore blockstore.Blockstore
 
 	// routing interface for communication
 	routing routing.IpfsRouting
@@ -66,7 +67,7 @@ func NewSession(parent context.Context, s bsnet.NetworkService, p *peer.Peer, d
 	receiver := bsnet.Forwarder{}
 	bs := &BitSwap{
 		peer:          p,
-		datastore:     d,
+		blockstore:    blockstore.NewBlockstore(d),
 		partners:      LedgerMap{},
 		wantList:      KeySet{},
 		routing:       r,
@@ -151,7 +152,9 @@ func (bs *BitSwap) HasBlock(blk blocks.Block) error {
 	return bs.routing.Provide(blk.Key())
 }
 
+// TODO(brian): get a return value
 func (bs *BitSwap) SendBlock(p *peer.Peer, b blocks.Block) {
+	u.DOut("Sending block to peer.\n")
 	message := bsmsg.New()
 	// TODO(brian): change interface to accept value instead of pointer
 	message.AppendBlock(b)
@@ -162,40 +165,26 @@ func (bs *BitSwap) SendBlock(p *peer.Peer, b blocks.Block) {
 // and then if we do, check the ledger for whether or not we should send it.
 func (bs *BitSwap) peerWantsBlock(p *peer.Peer, wanted u.Key) {
 	u.DOut("peer [%s] wants block [%s]\n", p.ID.Pretty(), wanted.Pretty())
+
 	ledger := bs.getLedger(p)
 
-	blk_i, err := bs.datastore.Get(wanted.DatastoreKey())
-	if err != nil {
-		if err == ds.ErrNotFound {
-			ledger.Wants(wanted)
-		}
-		u.PErr("datastore get error: %v\n", err)
+	if !ledger.ShouldSend() {
 		return
 	}
 
-	blk, ok := blk_i.([]byte)
-	if !ok {
-		u.PErr("data conversion error.\n")
+	block, err := bs.blockstore.Get(wanted)
+	if err != nil { // TODO(brian): log/return the error
+		ledger.Wants(wanted)
 		return
 	}
-
-	if ledger.ShouldSend() {
-		u.DOut("Sending block to peer.\n")
-		bblk, err := blocks.NewBlock(blk)
-		if err != nil {
-			u.PErr("newBlock error: %v\n", err)
-			return
-		}
-		bs.SendBlock(p, *bblk)
-		ledger.SentBytes(len(blk))
-	} else {
-		u.DOut("Decided not to send block.")
-	}
+	bs.SendBlock(p, *block)
+	ledger.SentBytes(numBytes(*block))
 }
 
+// TODO(brian): return error
 func (bs *BitSwap) blockReceive(p *peer.Peer, blk blocks.Block) {
 	u.DOut("blockReceive: %s\n", blk.Key().Pretty())
-	err := bs.datastore.Put(ds.NewKey(string(blk.Key())), blk.Data)
+	err := bs.blockstore.Put(blk)
 	if err != nil {
 		u.PErr("blockReceive error: %v\n", err)
 		return
@@ -255,3 +244,7 @@ func (bs *BitSwap) ReceiveMessage(
 	}
 	return nil, nil, errors.New("TODO implement")
 }
+
+func numBytes(b blocks.Block) int {
+	return len(b.Data)
+}