mirror of
https://github.com/etcd-io/etcd.git
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3d3e91c6e3
fix the unexpected blocking when using Barrier.Wait(), e.g. NewBarrier(client, "a").Wait() will block if key "a" is not existed but "a0" is existed, but it should return immediately. Signed-off-by: zhangwenkang <zwenkang@vmware.com>
125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package recipes_test
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import (
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"testing"
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"time"
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clientv3 "go.etcd.io/etcd/client/v3"
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recipe "go.etcd.io/etcd/client/v3/experimental/recipes"
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integration2 "go.etcd.io/etcd/tests/v3/framework/integration"
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)
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func TestBarrierSingleNode(t *testing.T) {
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integration2.BeforeTest(t)
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clus := integration2.NewCluster(t, &integration2.ClusterConfig{Size: 1})
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defer clus.Terminate(t)
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testBarrier(t, 5, func() *clientv3.Client { return clus.Client(0) })
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}
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func TestBarrierMultiNode(t *testing.T) {
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integration2.BeforeTest(t)
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clus := integration2.NewCluster(t, &integration2.ClusterConfig{Size: 3})
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defer clus.Terminate(t)
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testBarrier(t, 5, func() *clientv3.Client { return clus.RandClient() })
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}
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func testBarrier(t *testing.T, waiters int, chooseClient func() *clientv3.Client) {
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b := recipe.NewBarrier(chooseClient(), "test-barrier")
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if err := b.Hold(); err != nil {
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t.Fatalf("could not hold barrier (%v)", err)
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}
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if err := b.Hold(); err == nil {
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t.Fatalf("able to double-hold barrier")
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}
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donec := make(chan struct{})
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stopc := make(chan struct{})
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defer close(stopc)
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for i := 0; i < waiters; i++ {
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go func() {
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br := recipe.NewBarrier(chooseClient(), "test-barrier")
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if err := br.Wait(); err != nil {
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t.Errorf("could not wait on barrier (%v)", err)
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}
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select {
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case donec <- struct{}{}:
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case <-stopc:
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}
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}()
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}
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select {
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case <-donec:
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t.Fatalf("barrier did not wait")
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default:
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}
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if err := b.Release(); err != nil {
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t.Fatalf("could not release barrier (%v)", err)
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}
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timerC := time.After(time.Duration(waiters*100) * time.Millisecond)
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for i := 0; i < waiters; i++ {
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select {
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case <-timerC:
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t.Fatalf("barrier timed out")
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case <-donec:
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}
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}
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}
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func TestBarrierWaitNonexistentKey(t *testing.T) {
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integration2.BeforeTest(t)
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clus := integration2.NewCluster(t, &integration2.ClusterConfig{Size: 1})
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defer clus.Terminate(t)
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cli := clus.Client(0)
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if _, err := cli.Put(cli.Ctx(), "test-barrier-0", ""); err != nil {
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t.Errorf("could not put test-barrier0, err:%v", err)
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}
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donec := make(chan struct{})
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stopc := make(chan struct{})
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defer close(stopc)
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waiters := 5
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for i := 0; i < waiters; i++ {
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go func() {
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br := recipe.NewBarrier(cli, "test-barrier")
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if err := br.Wait(); err != nil {
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t.Errorf("could not wait on barrier (%v)", err)
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}
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select {
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case donec <- struct{}{}:
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case <-stopc:
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}
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}()
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}
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// all waiters should return immediately if waiting on a nonexistent key "test-barrier" even if key "test-barrier-0" exists
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timerC := time.After(time.Duration(waiters*100) * time.Millisecond)
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for i := 0; i < waiters; i++ {
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select {
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case <-timerC:
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t.Fatal("barrier timed out")
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case <-donec:
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}
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}
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}
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