opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/FollowerLogInformationImplTest.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.raft;
   9
  10 import static org.junit.Assert.assertFalse;
  11 import static org.junit.Assert.assertTrue;
  12 import com.google.common.base.Stopwatch;
  13 import com.google.common.util.concurrent.Uninterruptibles;
  14 import java.util.concurrent.TimeUnit;
  15 import org.junit.Test;
  16 import scala.concurrent.duration.FiniteDuration;
  17
  18 public class FollowerLogInformationImplTest {
  19
  20     @Test
  21     public void testIsFollowerActive() {
  22
  23         MockRaftActorContext context = new MockRaftActorContext();
  24         context.setCommitIndex(10);
  25
  26         DefaultConfigParamsImpl configParams = new DefaultConfigParamsImpl();
  27         configParams.setHeartBeatInterval(new FiniteDuration(500, TimeUnit.MILLISECONDS));
  28         configParams.setElectionTimeoutFactor(1);
  29         context.setConfigParams(configParams);
  30
  31         FollowerLogInformation followerLogInformation =
  32                 new FollowerLogInformationImpl(new PeerInfo("follower1", null, VotingState.VOTING), 9, context);
  33
  34         assertFalse("Follower should be termed inactive before stopwatch starts",
  35                 followerLogInformation.isFollowerActive());
  36
  37         followerLogInformation.markFollowerActive();
  38         if (sleepWithElaspsedTimeReturned(200) > 200) {
  39             return;
  40         }
  41         assertTrue("Follower should be active", followerLogInformation.isFollowerActive());
  42
  43         if (sleepWithElaspsedTimeReturned(400) > 400) {
  44             return;
  45         }
  46         assertFalse("Follower should be inactive after time lapsed",
  47                 followerLogInformation.isFollowerActive());
  48
  49         followerLogInformation.markFollowerActive();
  50         assertTrue("Follower should be active from inactive",
  51                 followerLogInformation.isFollowerActive());
  52     }
  53
  54     // we cannot rely comfortably that the sleep will indeed sleep for the desired time
  55     // hence getting the actual elapsed time and do a match.
  56     // if the sleep has spilled over, then return the test gracefully
  57     private static long sleepWithElaspsedTimeReturned(long millis) {
  58         Stopwatch stopwatch = Stopwatch.createStarted();
  59         Uninterruptibles.sleepUninterruptibly(millis, TimeUnit.MILLISECONDS);
  60         stopwatch.stop();
  61         return stopwatch.elapsed(TimeUnit.MILLISECONDS);
  62     }
  63
  64     @Test
  65     public void testOkToReplicate(){
  66         MockRaftActorContext context = new MockRaftActorContext();
  67         context.setCommitIndex(0);
  68         FollowerLogInformation followerLogInformation =
  69                 new FollowerLogInformationImpl(new PeerInfo("follower1", null, VotingState.VOTING), 10, context);
  70
  71         assertTrue(followerLogInformation.okToReplicate());
  72         assertFalse(followerLogInformation.okToReplicate());
  73
  74         // wait for 150 milliseconds and it should work again
  75         Uninterruptibles.sleepUninterruptibly(150, TimeUnit.MILLISECONDS);
  76         assertTrue(followerLogInformation.okToReplicate());
  77
  78         //increment next index and try immediately and it should work again
  79         followerLogInformation.incrNextIndex();
  80         assertTrue(followerLogInformation.okToReplicate());
  81     }
  82
  83     @Test
  84     public void testVotingNotInitializedState() {
  85         final PeerInfo peerInfo = new PeerInfo("follower1", null, VotingState.VOTING_NOT_INITIALIZED);
  86         MockRaftActorContext context = new MockRaftActorContext();
  87         context.setCommitIndex(0);
  88         FollowerLogInformation followerLogInformation = new FollowerLogInformationImpl(peerInfo, -1, context);
  89
  90         assertFalse(followerLogInformation.okToReplicate());
  91
  92         followerLogInformation.markFollowerActive();
  93         assertFalse(followerLogInformation.isFollowerActive());
  94
  95         peerInfo.setVotingState(VotingState.VOTING);
  96         assertTrue(followerLogInformation.okToReplicate());
  97
  98         followerLogInformation.markFollowerActive();
  99         assertTrue(followerLogInformation.isFollowerActive());
 100     }
 101
 102     @Test
 103     public void testNonVotingState() {
 104         final PeerInfo peerInfo = new PeerInfo("follower1", null, VotingState.NON_VOTING);
 105         MockRaftActorContext context = new MockRaftActorContext();
 106         context.setCommitIndex(0);
 107         FollowerLogInformation followerLogInformation = new FollowerLogInformationImpl(peerInfo, -1, context);
 108
 109         assertTrue(followerLogInformation.okToReplicate());
 110
 111         followerLogInformation.markFollowerActive();
 112         assertTrue(followerLogInformation.isFollowerActive());
 113     }
 114 }