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v3_watch_test.go
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v3_watch_test.go
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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package integration
import (
"bytes"
"context"
"fmt"
"reflect"
"sort"
"sync"
"testing"
"time"
"go.etcd.io/etcd/etcdserver/api/v3rpc"
pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
"go.etcd.io/etcd/mvcc/mvccpb"
"go.etcd.io/etcd/pkg/testutil"
)
// TestV3WatchFromCurrentRevision tests Watch APIs from current revision.
func TestV3WatchFromCurrentRevision(t *testing.T) {
defer testutil.AfterTest(t)
tests := []struct {
putKeys []string
watchRequest *pb.WatchRequest
wresps []*pb.WatchResponse
}{
// watch the key, matching
{
[]string{"foo"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo")}}},
[]*pb.WatchResponse{
{
Header: &pb.ResponseHeader{Revision: 2},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
},
},
},
},
// watch the key, non-matching
{
[]string{"foo"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("helloworld")}}},
[]*pb.WatchResponse{},
},
// watch the prefix, matching
{
[]string{"fooLong"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"),
RangeEnd: []byte("fop")}}},
[]*pb.WatchResponse{
{
Header: &pb.ResponseHeader{Revision: 2},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("fooLong"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
},
},
},
},
// watch the prefix, non-matching
{
[]string{"foo"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("helloworld"),
RangeEnd: []byte("helloworle")}}},
[]*pb.WatchResponse{},
},
// watch full range, matching
{
[]string{"fooLong"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte(""),
RangeEnd: []byte("\x00")}}},
[]*pb.WatchResponse{
{
Header: &pb.ResponseHeader{Revision: 2},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("fooLong"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
},
},
},
},
// multiple puts, one watcher with matching key
{
[]string{"foo", "foo", "foo"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo")}}},
[]*pb.WatchResponse{
{
Header: &pb.ResponseHeader{Revision: 2},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
},
},
{
Header: &pb.ResponseHeader{Revision: 3},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 3, Version: 2},
},
},
},
{
Header: &pb.ResponseHeader{Revision: 4},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 4, Version: 3},
},
},
},
},
},
// multiple puts, one watcher with matching prefix
{
[]string{"foo", "foo", "foo"},
&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"),
RangeEnd: []byte("fop")}}},
[]*pb.WatchResponse{
{
Header: &pb.ResponseHeader{Revision: 2},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
},
},
{
Header: &pb.ResponseHeader{Revision: 3},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 3, Version: 2},
},
},
},
{
Header: &pb.ResponseHeader{Revision: 4},
Created: false,
Events: []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 4, Version: 3},
},
},
},
},
},
}
for i, tt := range tests {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
wAPI := toGRPC(clus.RandClient()).Watch
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, err := wAPI.Watch(ctx)
if err != nil {
t.Fatalf("#%d: wAPI.Watch error: %v", i, err)
}
err = wStream.Send(tt.watchRequest)
if err != nil {
t.Fatalf("#%d: wStream.Send error: %v", i, err)
}
// ensure watcher request created a new watcher
cresp, err := wStream.Recv()
if err != nil {
t.Errorf("#%d: wStream.Recv error: %v", i, err)
clus.Terminate(t)
continue
}
if !cresp.Created {
t.Errorf("#%d: did not create watchid, got %+v", i, cresp)
clus.Terminate(t)
continue
}
if cresp.Canceled {
t.Errorf("#%d: canceled watcher on create %+v", i, cresp)
clus.Terminate(t)
continue
}
createdWatchId := cresp.WatchId
if cresp.Header == nil || cresp.Header.Revision != 1 {
t.Errorf("#%d: header revision got +%v, wanted revison 1", i, cresp)
clus.Terminate(t)
continue
}
// asynchronously create keys
ch := make(chan struct{}, 1)
go func() {
for _, k := range tt.putKeys {
kvc := toGRPC(clus.RandClient()).KV
req := &pb.PutRequest{Key: []byte(k), Value: []byte("bar")}
if _, err := kvc.Put(context.TODO(), req); err != nil {
t.Errorf("#%d: couldn't put key (%v)", i, err)
}
}
ch <- struct{}{}
}()
// check stream results
for j, wresp := range tt.wresps {
resp, err := wStream.Recv()
if err != nil {
t.Errorf("#%d.%d: wStream.Recv error: %v", i, j, err)
}
if resp.Header == nil {
t.Fatalf("#%d.%d: unexpected nil resp.Header", i, j)
}
if resp.Header.Revision != wresp.Header.Revision {
t.Errorf("#%d.%d: resp.Header.Revision got = %d, want = %d", i, j, resp.Header.Revision, wresp.Header.Revision)
}
if wresp.Created != resp.Created {
t.Errorf("#%d.%d: resp.Created got = %v, want = %v", i, j, resp.Created, wresp.Created)
}
if resp.WatchId != createdWatchId {
t.Errorf("#%d.%d: resp.WatchId got = %d, want = %d", i, j, resp.WatchId, createdWatchId)
}
if !reflect.DeepEqual(resp.Events, wresp.Events) {
t.Errorf("#%d.%d: resp.Events got = %+v, want = %+v", i, j, resp.Events, wresp.Events)
}
}
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
// wait for the client to finish sending the keys before terminating the cluster
<-ch
// can't defer because tcp ports will be in use
clus.Terminate(t)
}
}
// TestV3WatchFutureRevision tests Watch APIs from a future revision.
func TestV3WatchFutureRevision(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 1})
defer clus.Terminate(t)
wAPI := toGRPC(clus.RandClient()).Watch
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, err := wAPI.Watch(ctx)
if err != nil {
t.Fatalf("wAPI.Watch error: %v", err)
}
wkey := []byte("foo")
wrev := int64(10)
req := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{Key: wkey, StartRevision: wrev}}}
err = wStream.Send(req)
if err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
// ensure watcher request created a new watcher
cresp, err := wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if !cresp.Created {
t.Fatalf("create %v, want %v", cresp.Created, true)
}
kvc := toGRPC(clus.RandClient()).KV
for {
req := &pb.PutRequest{Key: wkey, Value: []byte("bar")}
resp, rerr := kvc.Put(context.TODO(), req)
if rerr != nil {
t.Fatalf("couldn't put key (%v)", rerr)
}
if resp.Header.Revision == wrev {
break
}
}
// ensure watcher request created a new watcher
cresp, err = wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if cresp.Header.Revision != wrev {
t.Fatalf("revision = %d, want %d", cresp.Header.Revision, wrev)
}
if len(cresp.Events) != 1 {
t.Fatalf("failed to receive events")
}
if cresp.Events[0].Kv.ModRevision != wrev {
t.Errorf("mod revision = %d, want %d", cresp.Events[0].Kv.ModRevision, wrev)
}
}
// TestV3WatchWrongRange tests wrong range does not create watchers.
func TestV3WatchWrongRange(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 1})
defer clus.Terminate(t)
wAPI := toGRPC(clus.RandClient()).Watch
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, err := wAPI.Watch(ctx)
if err != nil {
t.Fatalf("wAPI.Watch error: %v", err)
}
tests := []struct {
key []byte
end []byte
canceled bool
}{
{[]byte("a"), []byte("a"), true}, // wrong range end
{[]byte("b"), []byte("a"), true}, // wrong range end
{[]byte("foo"), []byte{0}, false}, // watch request with 'WithFromKey'
}
for i, tt := range tests {
if err := wStream.Send(&pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{Key: tt.key, RangeEnd: tt.end, StartRevision: 1}}}); err != nil {
t.Fatalf("#%d: wStream.Send error: %v", i, err)
}
cresp, err := wStream.Recv()
if err != nil {
t.Fatalf("#%d: wStream.Recv error: %v", i, err)
}
if !cresp.Created {
t.Fatalf("#%d: create %v, want %v", i, cresp.Created, true)
}
if cresp.Canceled != tt.canceled {
t.Fatalf("#%d: canceled %v, want %v", i, tt.canceled, cresp.Canceled)
}
if tt.canceled && cresp.WatchId != -1 {
t.Fatalf("#%d: canceled watch ID %d, want -1", i, cresp.WatchId)
}
}
}
// TestV3WatchCancelSynced tests Watch APIs cancellation from synced map.
func TestV3WatchCancelSynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchCancel(t, 0)
}
// TestV3WatchCancelUnsynced tests Watch APIs cancellation from unsynced map.
func TestV3WatchCancelUnsynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchCancel(t, 1)
}
func testV3WatchCancel(t *testing.T, startRev int64) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, errW := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if errW != nil {
t.Fatalf("wAPI.Watch error: %v", errW)
}
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), StartRevision: startRev}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
wresp, errR := wStream.Recv()
if errR != nil {
t.Errorf("wStream.Recv error: %v", errR)
}
if !wresp.Created {
t.Errorf("wresp.Created got = %v, want = true", wresp.Created)
}
creq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CancelRequest{
CancelRequest: &pb.WatchCancelRequest{
WatchId: wresp.WatchId}}}
if err := wStream.Send(creq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
cresp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
if !cresp.Canceled {
t.Errorf("cresp.Canceled got = %v, want = true", cresp.Canceled)
}
kvc := toGRPC(clus.RandClient()).KV
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")}); err != nil {
t.Errorf("couldn't put key (%v)", err)
}
// watch got canceled, so this should block
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
}
// TestV3WatchCurrentPutOverlap ensures current watchers receive all events with
// overlapping puts.
func TestV3WatchCurrentPutOverlap(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, wErr := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if wErr != nil {
t.Fatalf("wAPI.Watch error: %v", wErr)
}
// last mod_revision that will be observed
nrRevisions := 32
// first revision already allocated as empty revision
var wg sync.WaitGroup
for i := 1; i < nrRevisions; i++ {
wg.Add(1)
go func() {
defer wg.Done()
kvc := toGRPC(clus.RandClient()).KV
req := &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")}
if _, err := kvc.Put(context.TODO(), req); err != nil {
t.Errorf("couldn't put key (%v)", err)
}
}()
}
// maps watcher to current expected revision
progress := make(map[int64]int64)
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{Key: []byte("foo"), RangeEnd: []byte("fop")}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("first watch request failed (%v)", err)
}
more := true
progress[-1] = 0 // watcher creation pending
for more {
resp, err := wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if resp.Created {
// accept events > header revision
progress[resp.WatchId] = resp.Header.Revision + 1
if resp.Header.Revision == int64(nrRevisions) {
// covered all revisions; create no more watchers
progress[-1] = int64(nrRevisions) + 1
} else if err := wStream.Send(wreq); err != nil {
t.Fatalf("watch request failed (%v)", err)
}
} else if len(resp.Events) == 0 {
t.Fatalf("got events %v, want non-empty", resp.Events)
} else {
wRev, ok := progress[resp.WatchId]
if !ok {
t.Fatalf("got %+v, but watch id shouldn't exist ", resp)
}
if resp.Events[0].Kv.ModRevision != wRev {
t.Fatalf("got %+v, wanted first revision %d", resp, wRev)
}
lastRev := resp.Events[len(resp.Events)-1].Kv.ModRevision
progress[resp.WatchId] = lastRev + 1
}
more = false
for _, v := range progress {
if v <= int64(nrRevisions) {
more = true
break
}
}
}
if rok, nr := waitResponse(wStream, time.Second); !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
wg.Wait()
}
// TestV3WatchEmptyKey ensures synced watchers see empty key PUTs as PUT events
func TestV3WatchEmptyKey(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 1})
defer clus.Terminate(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
ws, werr := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if werr != nil {
t.Fatal(werr)
}
req := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo")}}}
if err := ws.Send(req); err != nil {
t.Fatal(err)
}
if _, err := ws.Recv(); err != nil {
t.Fatal(err)
}
// put a key with empty value
kvc := toGRPC(clus.RandClient()).KV
preq := &pb.PutRequest{Key: []byte("foo")}
if _, err := kvc.Put(context.TODO(), preq); err != nil {
t.Fatal(err)
}
// check received PUT
resp, rerr := ws.Recv()
if rerr != nil {
t.Fatal(rerr)
}
wevs := []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
}
if !reflect.DeepEqual(resp.Events, wevs) {
t.Fatalf("got %v, expected %v", resp.Events, wevs)
}
}
func TestV3WatchMultipleWatchersSynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleWatchers(t, 0)
}
func TestV3WatchMultipleWatchersUnsynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleWatchers(t, 1)
}
// testV3WatchMultipleWatchers tests multiple watchers on the same key
// and one watcher with matching prefix. It first puts the key
// that matches all watchers, and another key that matches only
// one watcher to test if it receives expected events.
func testV3WatchMultipleWatchers(t *testing.T, startRev int64) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
kvc := toGRPC(clus.RandClient()).KV
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, errW := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if errW != nil {
t.Fatalf("wAPI.Watch error: %v", errW)
}
watchKeyN := 4
for i := 0; i < watchKeyN+1; i++ {
var wreq *pb.WatchRequest
if i < watchKeyN {
wreq = &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), StartRevision: startRev}}}
} else {
wreq = &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("fo"), RangeEnd: []byte("fp"), StartRevision: startRev}}}
}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
}
ids := make(map[int64]struct{})
for i := 0; i < watchKeyN+1; i++ {
wresp, err := wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if !wresp.Created {
t.Fatalf("wresp.Created got = %v, want = true", wresp.Created)
}
ids[wresp.WatchId] = struct{}{}
}
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
for i := 0; i < watchKeyN+1; i++ {
wresp, err := wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if _, ok := ids[wresp.WatchId]; !ok {
t.Errorf("watchId %d is not created!", wresp.WatchId)
} else {
delete(ids, wresp.WatchId)
}
if len(wresp.Events) == 0 {
t.Errorf("#%d: no events received", i)
}
for _, ev := range wresp.Events {
if string(ev.Kv.Key) != "foo" {
t.Errorf("ev.Kv.Key got = %s, want = foo", ev.Kv.Key)
}
if string(ev.Kv.Value) != "bar" {
t.Errorf("ev.Kv.Value got = %s, want = bar", ev.Kv.Value)
}
}
}
// now put one key that has only one matching watcher
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("fo"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
wresp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
if len(wresp.Events) != 1 {
t.Fatalf("len(wresp.Events) got = %d, want = 1", len(wresp.Events))
}
if string(wresp.Events[0].Kv.Key) != "fo" {
t.Errorf("wresp.Events[0].Kv.Key got = %s, want = fo", wresp.Events[0].Kv.Key)
}
// now Recv should block because there is no more events coming
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
}
func TestV3WatchMultipleEventsTxnSynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleEventsTxn(t, 0)
}
func TestV3WatchMultipleEventsTxnUnsynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleEventsTxn(t, 1)
}
// testV3WatchMultipleEventsTxn tests Watch APIs when it receives multiple events.
func testV3WatchMultipleEventsTxn(t *testing.T, startRev int64) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, wErr := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if wErr != nil {
t.Fatalf("wAPI.Watch error: %v", wErr)
}
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), RangeEnd: []byte("fop"), StartRevision: startRev}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
if resp, err := wStream.Recv(); err != nil || !resp.Created {
t.Fatalf("create response failed: resp=%v, err=%v", resp, err)
}
kvc := toGRPC(clus.RandClient()).KV
txn := pb.TxnRequest{}
for i := 0; i < 3; i++ {
ru := &pb.RequestOp{}
ru.Request = &pb.RequestOp_RequestPut{
RequestPut: &pb.PutRequest{
Key: []byte(fmt.Sprintf("foo%d", i)), Value: []byte("bar")}}
txn.Success = append(txn.Success, ru)
}
tresp, err := kvc.Txn(context.Background(), &txn)
if err != nil {
t.Fatalf("kvc.Txn error: %v", err)
}
if !tresp.Succeeded {
t.Fatalf("kvc.Txn failed: %+v", tresp)
}
events := []*mvccpb.Event{}
for len(events) < 3 {
resp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
events = append(events, resp.Events...)
}
sort.Sort(eventsSortByKey(events))
wevents := []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo0"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo1"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo2"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
}
if !reflect.DeepEqual(events, wevents) {
t.Errorf("events got = %+v, want = %+v", events, wevents)
}
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
}
type eventsSortByKey []*mvccpb.Event
func (evs eventsSortByKey) Len() int { return len(evs) }
func (evs eventsSortByKey) Swap(i, j int) { evs[i], evs[j] = evs[j], evs[i] }
func (evs eventsSortByKey) Less(i, j int) bool {
return bytes.Compare(evs[i].Kv.Key, evs[j].Kv.Key) < 0
}
func TestV3WatchMultipleEventsPutUnsynced(t *testing.T) {
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
kvc := toGRPC(clus.RandClient()).KV
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo0"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo1"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, wErr := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if wErr != nil {
t.Fatalf("wAPI.Watch error: %v", wErr)
}
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), RangeEnd: []byte("fop"), StartRevision: 1}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo0"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo1"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
allWevents := []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo0"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo1"), Value: []byte("bar"), CreateRevision: 3, ModRevision: 3, Version: 1},
},
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo0"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 4, Version: 2},
},
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo1"), Value: []byte("bar"), CreateRevision: 3, ModRevision: 5, Version: 2},
},
}
events := []*mvccpb.Event{}
for len(events) < 4 {
resp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
if resp.Created {
continue
}
events = append(events, resp.Events...)
// if PUT requests are committed by now, first receive would return
// multiple events, but if not, it returns a single event. In SSD,
// it should return 4 events at once.
}
if !reflect.DeepEqual(events, allWevents) {
t.Errorf("events got = %+v, want = %+v", events, allWevents)
}
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
}
func TestV3WatchMultipleStreamsSynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleStreams(t, 0)
}
func TestV3WatchMultipleStreamsUnsynced(t *testing.T) {
defer testutil.AfterTest(t)
testV3WatchMultipleStreams(t, 1)
}
// testV3WatchMultipleStreams tests multiple watchers on the same key on multiple streams.
func testV3WatchMultipleStreams(t *testing.T, startRev int64) {
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
wAPI := toGRPC(clus.RandClient()).Watch
kvc := toGRPC(clus.RandClient()).KV
streams := make([]pb.Watch_WatchClient, 5)
for i := range streams {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, errW := wAPI.Watch(ctx)
if errW != nil {
t.Fatalf("wAPI.Watch error: %v", errW)
}
wreq := &pb.WatchRequest{RequestUnion: &pb.WatchRequest_CreateRequest{
CreateRequest: &pb.WatchCreateRequest{
Key: []byte("foo"), StartRevision: startRev}}}
if err := wStream.Send(wreq); err != nil {
t.Fatalf("wStream.Send error: %v", err)
}
streams[i] = wStream
}
for _, wStream := range streams {
wresp, err := wStream.Recv()
if err != nil {
t.Fatalf("wStream.Recv error: %v", err)
}
if !wresp.Created {
t.Fatalf("wresp.Created got = %v, want = true", wresp.Created)
}
}
if _, err := kvc.Put(context.TODO(), &pb.PutRequest{Key: []byte("foo"), Value: []byte("bar")}); err != nil {
t.Fatalf("couldn't put key (%v)", err)
}
var wg sync.WaitGroup
wg.Add(len(streams))
wevents := []*mvccpb.Event{
{
Type: mvccpb.PUT,
Kv: &mvccpb.KeyValue{Key: []byte("foo"), Value: []byte("bar"), CreateRevision: 2, ModRevision: 2, Version: 1},
},
}
for i := range streams {
go func(i int) {
defer wg.Done()
wStream := streams[i]
wresp, err := wStream.Recv()
if err != nil {
t.Errorf("wStream.Recv error: %v", err)
}
if wresp.WatchId != 0 {
t.Errorf("watchId got = %d, want = 0", wresp.WatchId)
}
if !reflect.DeepEqual(wresp.Events, wevents) {
t.Errorf("wresp.Events got = %+v, want = %+v", wresp.Events, wevents)
}
// now Recv should block because there is no more events coming
rok, nr := waitResponse(wStream, 1*time.Second)
if !rok {
t.Errorf("unexpected pb.WatchResponse is received %+v", nr)
}
}(i)
}
wg.Wait()
}
// waitResponse waits on the given stream for given duration.
// If there is no more events, true and a nil response will be
// returned closing the WatchClient stream. Or the response will
// be returned.
func waitResponse(wc pb.Watch_WatchClient, timeout time.Duration) (bool, *pb.WatchResponse) {
rCh := make(chan *pb.WatchResponse, 1)
donec := make(chan struct{})
defer close(donec)
go func() {
resp, _ := wc.Recv()
select {
case rCh <- resp:
case <-donec:
}
}()
select {
case nr := <-rCh:
return false, nr
case <-time.After(timeout):
}
// didn't get response
wc.CloseSend()
return true, nil
}
func TestWatchWithProgressNotify(t *testing.T) {
// accelerate report interval so test terminates quickly
oldpi := v3rpc.GetProgressReportInterval()
// using atomics to avoid race warnings
v3rpc.SetProgressReportInterval(3 * time.Second)
testInterval := 3 * time.Second
defer func() { v3rpc.SetProgressReportInterval(oldpi) }()
defer testutil.AfterTest(t)
clus := NewClusterV3(t, &ClusterConfig{Size: 3})
defer clus.Terminate(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
wStream, wErr := toGRPC(clus.RandClient()).Watch.Watch(ctx)
if wErr != nil {