ipns TestFastRepublish

fuse/ipns/ipns_test.go

@@ -9,7 +9,8 @@ import (
 	"time"
 
 	fstest "github.com/jbenet/go-ipfs/Godeps/_workspace/src/bazil.org/fuse/fs/fstestutil"
-	"github.com/jbenet/go-ipfs/core"
+	core "github.com/jbenet/go-ipfs/core"
+	u "github.com/jbenet/go-ipfs/util"
 )
 
 func randBytes(size int) []byte {
@@ -19,7 +20,10 @@ func randBytes(size int) []byte {
 }
 
 func writeFile(t *testing.T, size int, path string) []byte {
-	data := randBytes(size)
+	return writeFileData(t, randBytes(size), path)
+}
+
+func writeFileData(t *testing.T, data []byte, path string) []byte {
 	fi, err := os.Create(path)
 	if err != nil {
 		t.Fatal(err)
@@ -179,6 +183,106 @@ func TestAppendFile(t *testing.T) {
 	}
 }
 
+func TestFastRepublish(t *testing.T) {
+
+	// make timeout noticeable.
+	osrt := shortRepublishTimeout
+	shortRepublishTimeout = time.Millisecond * 100
+
+	olrt := longRepublishTimeout
+	longRepublishTimeout = time.Second
+
+	node, mnt := setupIpnsTest(t, nil)
+
+	h, err := node.Identity.PrivKey.GetPublic().Hash()
+	if err != nil {
+		t.Fatal(err)
+	}
+	pubkeyHash := u.Key(h).Pretty()
+
+	// set them back
+	defer func() {
+		shortRepublishTimeout = osrt
+		longRepublishTimeout = olrt
+		mnt.Close()
+	}()
+
+	closed := make(chan struct{})
+	dataA := []byte("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
+	dataB := []byte("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
+
+	fname := mnt.Dir + "/local/file"
+
+	// get first resolved hash
+	log.Debug("publishing first hash")
+	writeFileData(t, dataA, fname) // random
+	<-time.After(shortRepublishTimeout * 11 / 10)
+	log.Debug("resolving first hash")
+	resolvedHash, err := node.Namesys.Resolve(pubkeyHash)
+	if err != nil {
+		t.Fatal("resolve err:", pubkeyHash, err)
+	}
+
+	// constantly keep writing to the file
+	go func() {
+		for {
+			select {
+			case <-closed:
+				return
+
+			case <-time.After(shortRepublishTimeout * 8 / 10):
+				writeFileData(t, dataB, fname)
+			}
+		}
+	}()
+
+	hasPublished := func() bool {
+		res, err := node.Namesys.Resolve(pubkeyHash)
+		if err != nil {
+			t.Fatal("resolve err: %v", err)
+		}
+		return res != resolvedHash
+	}
+
+	// test things
+
+	// at this point, should not have written dataA and not have written dataB
+	rbuf, err := ioutil.ReadFile(fname)
+	if err != nil || !bytes.Equal(rbuf, dataA) {
+		t.Fatal("Data inconsistent! %v %v", err, string(rbuf))
+	}
+
+	if hasPublished() {
+		t.Fatal("published (wrote)")
+	}
+
+	<-time.After(shortRepublishTimeout * 11 / 10)
+
+	// at this point, should have written written dataB, but not published it
+	rbuf, err = ioutil.ReadFile(fname)
+	if err != nil || !bytes.Equal(rbuf, dataB) {
+		t.Fatal("Data inconsistent! %v %v", err, string(rbuf))
+	}
+
+	if hasPublished() {
+		t.Fatal("published (wrote)")
+	}
+
+	<-time.After(longRepublishTimeout * 11 / 10)
+
+	// at this point, should have written written dataB, and published it
+	rbuf, err = ioutil.ReadFile(fname)
+	if err != nil || !bytes.Equal(rbuf, dataB) {
+		t.Fatal("Data inconsistent! %v %v", err, string(rbuf))
+	}
+
+	if !hasPublished() {
+		t.Fatal("not published")
+	}
+
+	close(closed)
+}
+
 // Test writing a medium sized file one byte at a time
 func TestMultiWrite(t *testing.T) {
 	_, mnt := setupIpnsTest(t, nil)

fuse/ipns/ipns_unix.go

@@ -21,6 +21,11 @@ import (
 
 var log = u.Logger("ipns")
 
+var (
+	shortRepublishTimeout = time.Millisecond * 5
+	longRepublishTimeout  = time.Millisecond * 500
+)
+
 // FileSystem is the readwrite IPNS Fuse Filesystem.
 type FileSystem struct {
 	Ipfs     *core.IpfsNode
@@ -71,7 +76,7 @@ func CreateRoot(n *core.IpfsNode, keys []ci.PrivKey, ipfsroot string) (*Root, er
 		nd := new(Node)
 		nd.Ipfs = n
 		nd.key = k
-		nd.repub = NewRepublisher(nd, time.Millisecond*5, time.Millisecond*500)
+		nd.repub = NewRepublisher(nd, shortRepublishTimeout, longRepublishTimeout)
 
 		go nd.repub.Run()
 

fuse/ipns/repub_unix.go

@@ -22,28 +22,21 @@ func (np *Republisher) Run() {
 	for _ = range np.Publish {
 		quick := time.After(np.TimeoutShort)
 		longer := time.After(np.TimeoutLong)
-		for {
-			select {
-			case <-quick:
-				//Do the publish!
-				log.Info("Publishing Changes!")
-				err := np.node.republishRoot()
-				if err != nil {
-					log.Critical("republishRoot error: %s", err)
-				}
-				goto done
-			case <-longer:
-				//Do the publish!
-				log.Info("Publishing Changes!")
-				err := np.node.republishRoot()
-				if err != nil {
-					log.Critical("republishRoot error: %s", err)
-				}
-				goto done
-			case <-np.Publish:
-				quick = time.After(np.TimeoutShort)
-			}
+
+	wait:
+		select {
+		case <-quick:
+		case <-longer:
+		case <-np.Publish:
+			quick = time.After(np.TimeoutShort)
+			goto wait
 		}
-	done:
+
+		log.Info("Publishing Changes!")
+		err := np.node.republishRoot()
+		if err != nil {
+			log.Critical("republishRoot error: %s", err)
+		}
+
 	}
 }