// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package stream
import (
"context"
crand "crypto/rand"
"encoding/binary"
"fmt"
"io"
"os"
"sync"
"testing"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/network/simulation"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
)
func TestIntervals(t *testing.T) {
testIntervals(t, true, nil, false)
testIntervals(t, false, NewRange(9, 26), false)
testIntervals(t, true, NewRange(9, 26), false)
testIntervals(t, true, nil, true)
testIntervals(t, false, NewRange(9, 26), true)
testIntervals(t, true, NewRange(9, 26), true)
}
func testIntervals(t *testing.T, live bool, history *Range, skipCheck bool) {
nodes := 2
chunkCount := dataChunkCount
externalStreamName := "externalStream"
externalStreamSessionAt := uint64(50)
externalStreamMaxKeys := uint64(100)
sim := simulation.New(map[string]simulation.ServiceFunc{
"intervalsStreamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
id := ctx.Config.ID
addr := network.NewAddrFromNodeID(id)
store, datadir, err := createTestLocalStorageForID(id, addr)
if err != nil {
return nil, nil, err
}
bucket.Store(bucketKeyStore, store)
cleanup = func() {
store.Close()
os.RemoveAll(datadir)
}
localStore := store.(*storage.LocalStore)
db := storage.NewDBAPI(localStore)
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
delivery := NewDelivery(kad, db)
r := NewRegistry(addr, delivery, db, state.NewInmemoryStore(), &RegistryOptions{
SkipCheck: skipCheck,
})
bucket.Store(bucketKeyRegistry, r)
r.RegisterClientFunc(externalStreamName, func(p *Peer, t string, live bool) (Client, error) {
return newTestExternalClient(db), nil
})
r.RegisterServerFunc(externalStreamName, func(p *Peer, t string, live bool) (Server, error) {
return newTestExternalServer(t, externalStreamSessionAt, externalStreamMaxKeys, nil), nil
})
fileStore := storage.NewFileStore(localStore, storage.NewFileStoreParams())
bucket.Store(bucketKeyFileStore, fileStore)
return r, cleanup, nil
},
})
defer sim.Close()
log.Info("Adding nodes to simulation")
_, err := sim.AddNodesAndConnectChain(nodes)
if err != nil {
t.Fatal(err)
}
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Second)
defer cancel()
result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
nodeIDs := sim.UpNodeIDs()
storer := nodeIDs[0]
checker := nodeIDs[1]
item, ok := sim.NodeItem(storer, bucketKeyFileStore)
if !ok {
return fmt.Errorf("No filestore")
}
fileStore := item.(*storage.FileStore)
size := chunkCount * chunkSize
_, wait, err := fileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
if err != nil {
log.Error("Store error: %v", "err", err)
t.Fatal(err)
}
err = wait(ctx)
if err != nil {
log.Error("Wait error: %v", "err", err)
t.Fatal(err)
}
item, ok = sim.NodeItem(checker, bucketKeyRegistry)
if !ok {
return fmt.Errorf("No registry")
}
registry := item.(*Registry)
liveErrC := make(chan error)
historyErrC := make(chan error)
if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
log.Error("WaitKademlia error: %v", "err", err)
return err
}
log.Debug("Watching for disconnections")
disconnections := sim.PeerEvents(
context.Background(),
sim.NodeIDs(),
simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
)
go func() {
for d := range disconnections {
if d.Error != nil {
log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
t.Fatal(d.Error)
}
}
}()
go func() {
if !live {
close(liveErrC)
return
}
var err error
defer func() {
liveErrC <- err
}()
// live stream
var liveHashesChan chan []byte
liveHashesChan, err = getHashes(ctx, registry, storer, NewStream(externalStreamName, "", true))
if err != nil {
log.Error("Subscription error: %v", "err", err)
return
}
i := externalStreamSessionAt
// we have subscribed, enable notifications
err = enableNotifications(registry, storer, NewStream(externalStreamName, "", true))
if err != nil {
return
}
for {
select {
case hash := <-liveHashesChan:
h := binary.BigEndian.Uint64(hash)
if h != i {
err = fmt.Errorf("expected live hash %d, got %d", i, h)
return
}
i++
if i > externalStreamMaxKeys {
return
}
case <-ctx.Done():
return
}
}
}()
go func() {
if live && history == nil {
close(historyErrC)
return
}
var err error
defer func() {
historyErrC <- err
}()
// history stream
var historyHashesChan chan []byte
historyHashesChan, err = getHashes(ctx, registry, storer, NewStream(externalStreamName, "", false))
if err != nil {
return
}
var i uint64
historyTo := externalStreamMaxKeys
if history != nil {
i = history.From
if history.To != 0 {
historyTo = history.To
}
}
// we have subscribed, enable notifications
err = enableNotifications(registry, storer, NewStream(externalStreamName, "", false))
if err != nil {
return
}
for {
select {
case hash := <-historyHashesChan:
h := binary.BigEndian.Uint64(hash)
if h != i {
err = fmt.Errorf("expected history hash %d, got %d", i, h)
return
}
i++
if i > historyTo {
return
}
case <-ctx.Done():
return
}
}
}()
err = registry.Subscribe(storer, NewStream(externalStreamName, "", live), history, Top)
if err != nil {
return err
}
if err := <-liveErrC; err != nil {
return err
}
if err := <-historyErrC; err != nil {
return err
}
return nil
})
if result.Error != nil {
t.Fatal(result.Error)
}
}
func getHashes(ctx context.Context, r *Registry, peerID discover.NodeID, s Stream) (chan []byte, error) {
peer := r.getPeer(peerID)
client, err := peer.getClient(ctx, s)
if err != nil {
return nil, err
}
c := client.Client.(*testExternalClient)
return c.hashes, nil
}
func enableNotifications(r *Registry, peerID discover.NodeID, s Stream) error {
peer := r.getPeer(peerID)
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
client, err := peer.getClient(ctx, s)
if err != nil {
return err
}
close(client.Client.(*testExternalClient).enableNotificationsC)
return nil
}
type testExternalClient struct {
hashes chan []byte
db *storage.DBAPI
enableNotificationsC chan struct{}
}
func newTestExternalClient(db *storage.DBAPI) *testExternalClient {
return &testExternalClient{
hashes: make(chan []byte),
db: db,
enableNotificationsC: make(chan struct{}),
}
}
func (c *testExternalClient) NeedData(ctx context.Context, hash []byte) func() {
chunk, _ := c.db.GetOrCreateRequest(ctx, hash)
if chunk.ReqC == nil {
return nil
}
c.hashes <- hash
//NOTE: This was failing on go1.9.x with a deadlock.
//Sometimes this function would just block
//It is commented now, but it may be well worth after the chunk refactor
//to re-enable this and see if the problem has been addressed
/*
return func() {
return chunk.WaitToStore()
}
*/
return nil
}
func (c *testExternalClient) BatchDone(Stream, uint64, []byte, []byte) func() (*TakeoverProof, error) {
return nil
}
func (c *testExternalClient) Close() {}
const testExternalServerBatchSize = 10
type testExternalServer struct {
t string
keyFunc func(key []byte, index uint64)
sessionAt uint64
maxKeys uint64
}
func newTestExternalServer(t string, sessionAt, maxKeys uint64, keyFunc func(key []byte, index uint64)) *testExternalServer {
if keyFunc == nil {
keyFunc = binary.BigEndian.PutUint64
}
return &testExternalServer{
t: t,
keyFunc: keyFunc,
sessionAt: sessionAt,
maxKeys: maxKeys,
}
}
func (s *testExternalServer) SetNextBatch(from uint64, to uint64) ([]byte, uint64, uint64, *HandoverProof, error) {
if from == 0 && to == 0 {
from = s.sessionAt
to = s.sessionAt + testExternalServerBatchSize
}
if to-from > testExternalServerBatchSize {
to = from + testExternalServerBatchSize - 1
}
if from >= s.maxKeys && to > s.maxKeys {
return nil, 0, 0, nil, io.EOF
}
if to > s.maxKeys {
to = s.maxKeys
}
b := make([]byte, HashSize*(to-from+1))
for i := from; i <= to; i++ {
s.keyFunc(b[(i-from)*HashSize:(i-from+1)*HashSize], i)
}
return b, from, to, nil, nil
}
func (s *testExternalServer) GetData(context.Context, []byte) ([]byte, error) {
return make([]byte, 4096), nil
}
func (s *testExternalServer) Close() {}
