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         FollowerLogInformation followerLogInformation =
  68                 new FollowerLogInformationImpl(new PeerInfo("follower1", null, VotingState.VOTING), 10, context);
  69
  70         assertTrue(followerLogInformation.okToReplicate());
  71         assertFalse(followerLogInformation.okToReplicate());
  72
  73         // wait for 150 milliseconds and it should work again
  74         Uninterruptibles.sleepUninterruptibly(150, TimeUnit.MILLISECONDS);
  75         assertTrue(followerLogInformation.okToReplicate());
  76
  77         //increment next index and try immediately and it should work again
  78         followerLogInformation.incrNextIndex();
  79         assertTrue(followerLogInformation.okToReplicate());
  80     }
  81
  82     @Test
  83     public void testVotingNotInitializedState() {
  84         final PeerInfo peerInfo = new PeerInfo("follower1", null, VotingState.VOTING_NOT_INITIALIZED);
  85         MockRaftActorContext context = new MockRaftActorContext();
  86         FollowerLogInformation followerLogInformation = new FollowerLogInformationImpl(peerInfo, -1, context);
  87
  88         assertFalse(followerLogInformation.okToReplicate());
  89
  90         followerLogInformation.markFollowerActive();
  91         assertFalse(followerLogInformation.isFollowerActive());
  92
  93         peerInfo.setVotingState(VotingState.VOTING);
  94         assertTrue(followerLogInformation.okToReplicate());
  95
  96         followerLogInformation.markFollowerActive();
  97         assertTrue(followerLogInformation.isFollowerActive());
  98     }
  99
 100     @Test
 101     public void testNonVotingState() {
 102         final PeerInfo peerInfo = new PeerInfo("follower1", null, VotingState.NON_VOTING);
 103         MockRaftActorContext context = new MockRaftActorContext();
 104         FollowerLogInformation followerLogInformation = new FollowerLogInformationImpl(peerInfo, -1, context);
 105
 106         assertTrue(followerLogInformation.okToReplicate());
 107
 108         followerLogInformation.markFollowerActive();
 109         assertTrue(followerLogInformation.isFollowerActive());
 110     }
 111 }