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27dc9594ba
@jbenet @whyrusleeping the next commit will change bitswap.Network.FindProviders to only deal with IDs
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
package bitswap
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import (
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"time"
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context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/code.google.com/p/go.net/context"
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ds "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore"
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ds_sync "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore/sync"
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blockstore "github.com/jbenet/go-ipfs/blocks/blockstore"
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exchange "github.com/jbenet/go-ipfs/exchange"
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tn "github.com/jbenet/go-ipfs/exchange/bitswap/testnet"
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peer "github.com/jbenet/go-ipfs/peer"
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datastore2 "github.com/jbenet/go-ipfs/util/datastore2"
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delay "github.com/jbenet/go-ipfs/util/delay"
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)
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func NewSessionGenerator(
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net tn.Network) SessionGenerator {
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ctx, cancel := context.WithCancel(context.TODO())
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return SessionGenerator{
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ps: peer.NewPeerstore(),
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net: net,
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seq: 0,
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ctx: ctx, // TODO take ctx as param to Next, Instances
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cancel: cancel,
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}
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}
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type SessionGenerator struct {
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seq int
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net tn.Network
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ps peer.Peerstore
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ctx context.Context
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cancel context.CancelFunc
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}
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func (g *SessionGenerator) Close() error {
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g.cancel()
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return nil // for Closer interface
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}
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func (g *SessionGenerator) Next() Instance {
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g.seq++
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return session(g.ctx, g.net, g.ps, peer.ID(g.seq))
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}
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func (g *SessionGenerator) Instances(n int) []Instance {
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instances := make([]Instance, 0)
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for j := 0; j < n; j++ {
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inst := g.Next()
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instances = append(instances, inst)
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}
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return instances
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}
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type Instance struct {
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Peer peer.ID
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Exchange exchange.Interface
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blockstore blockstore.Blockstore
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blockstoreDelay delay.D
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}
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func (i *Instance) Blockstore() blockstore.Blockstore {
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return i.blockstore
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}
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func (i *Instance) SetBlockstoreLatency(t time.Duration) time.Duration {
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return i.blockstoreDelay.Set(t)
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}
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// session creates a test bitswap session.
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//
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// NB: It's easy make mistakes by providing the same peer ID to two different
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// sessions. To safeguard, use the SessionGenerator to generate sessions. It's
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// just a much better idea.
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func session(ctx context.Context, net tn.Network, ps peer.Peerstore, p peer.ID) Instance {
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adapter := net.Adapter(p)
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bsdelay := delay.Fixed(0)
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const kWriteCacheElems = 100
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bstore, err := blockstore.WriteCached(blockstore.NewBlockstore(ds_sync.MutexWrap(datastore2.WithDelay(ds.NewMapDatastore(), bsdelay))), kWriteCacheElems)
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if err != nil {
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// FIXME perhaps change signature and return error.
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panic(err.Error())
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}
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const alwaysSendToPeer = true
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bs := New(ctx, p, adapter, bstore, alwaysSendToPeer)
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return Instance{
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Peer: p,
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Exchange: bs,
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blockstore: bstore,
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blockstoreDelay: bsdelay,
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}
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}
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