go.etcd.io/etcd@v3.3.27+incompatible/integration/v3_double_barrier_test.go (about)

     1  // Copyright 2016 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package integration
    16  
    17  import (
    18  	"testing"
    19  	"time"
    20  
    21  	"github.com/coreos/etcd/clientv3/concurrency"
    22  	"github.com/coreos/etcd/contrib/recipes"
    23  )
    24  
    25  func TestDoubleBarrier(t *testing.T) {
    26  	clus := NewClusterV3(t, &ClusterConfig{Size: 3})
    27  	defer clus.Terminate(t)
    28  
    29  	waiters := 10
    30  	session, err := concurrency.NewSession(clus.RandClient())
    31  	if err != nil {
    32  		t.Error(err)
    33  	}
    34  	defer session.Orphan()
    35  
    36  	b := recipe.NewDoubleBarrier(session, "test-barrier", waiters)
    37  	donec := make(chan struct{})
    38  	for i := 0; i < waiters-1; i++ {
    39  		go func() {
    40  			session, err := concurrency.NewSession(clus.RandClient())
    41  			if err != nil {
    42  				t.Error(err)
    43  			}
    44  			defer session.Orphan()
    45  
    46  			bb := recipe.NewDoubleBarrier(session, "test-barrier", waiters)
    47  			if err := bb.Enter(); err != nil {
    48  				t.Fatalf("could not enter on barrier (%v)", err)
    49  			}
    50  			donec <- struct{}{}
    51  			if err := bb.Leave(); err != nil {
    52  				t.Fatalf("could not leave on barrier (%v)", err)
    53  			}
    54  			donec <- struct{}{}
    55  		}()
    56  	}
    57  
    58  	time.Sleep(10 * time.Millisecond)
    59  	select {
    60  	case <-donec:
    61  		t.Fatalf("barrier did not enter-wait")
    62  	default:
    63  	}
    64  
    65  	if err := b.Enter(); err != nil {
    66  		t.Fatalf("could not enter last barrier (%v)", err)
    67  	}
    68  
    69  	timerC := time.After(time.Duration(waiters*100) * time.Millisecond)
    70  	for i := 0; i < waiters-1; i++ {
    71  		select {
    72  		case <-timerC:
    73  			t.Fatalf("barrier enter timed out")
    74  		case <-donec:
    75  		}
    76  	}
    77  
    78  	time.Sleep(10 * time.Millisecond)
    79  	select {
    80  	case <-donec:
    81  		t.Fatalf("barrier did not leave-wait")
    82  	default:
    83  	}
    84  
    85  	b.Leave()
    86  	timerC = time.After(time.Duration(waiters*100) * time.Millisecond)
    87  	for i := 0; i < waiters-1; i++ {
    88  		select {
    89  		case <-timerC:
    90  			t.Fatalf("barrier leave timed out")
    91  		case <-donec:
    92  		}
    93  	}
    94  }
    95  
    96  func TestDoubleBarrierFailover(t *testing.T) {
    97  	clus := NewClusterV3(t, &ClusterConfig{Size: 3})
    98  	defer clus.Terminate(t)
    99  
   100  	waiters := 10
   101  	donec := make(chan struct{})
   102  
   103  	s0, err := concurrency.NewSession(clus.clients[0])
   104  	if err != nil {
   105  		t.Error(err)
   106  	}
   107  	defer s0.Orphan()
   108  	s1, err := concurrency.NewSession(clus.clients[0])
   109  	if err != nil {
   110  		t.Error(err)
   111  	}
   112  	defer s1.Orphan()
   113  
   114  	// sacrificial barrier holder; lease will be revoked
   115  	go func() {
   116  		b := recipe.NewDoubleBarrier(s0, "test-barrier", waiters)
   117  		if berr := b.Enter(); berr != nil {
   118  			t.Fatalf("could not enter on barrier (%v)", berr)
   119  		}
   120  		donec <- struct{}{}
   121  	}()
   122  
   123  	for i := 0; i < waiters-1; i++ {
   124  		go func() {
   125  			b := recipe.NewDoubleBarrier(s1, "test-barrier", waiters)
   126  			if berr := b.Enter(); berr != nil {
   127  				t.Fatalf("could not enter on barrier (%v)", berr)
   128  			}
   129  			donec <- struct{}{}
   130  			b.Leave()
   131  			donec <- struct{}{}
   132  		}()
   133  	}
   134  
   135  	// wait for barrier enter to unblock
   136  	for i := 0; i < waiters; i++ {
   137  		select {
   138  		case <-donec:
   139  		case <-time.After(10 * time.Second):
   140  			t.Fatalf("timed out waiting for enter, %d", i)
   141  		}
   142  	}
   143  
   144  	if err = s0.Close(); err != nil {
   145  		t.Fatal(err)
   146  	}
   147  	// join on rest of waiters
   148  	for i := 0; i < waiters-1; i++ {
   149  		select {
   150  		case <-donec:
   151  		case <-time.After(10 * time.Second):
   152  			t.Fatalf("timed out waiting for leave, %d", i)
   153  		}
   154  	}
   155  }