Package net.kuujo.copycat.test

Examples of net.kuujo.copycat.test.TestCluster

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  /**
   * Tests that the leader's expanded configuration is logged and replicated.
   */
  public void testLeaderReplicatesExpandedConfiguration() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node2);

    TestNode node3 = new TestNode()
      .withCluster("baz", "bar", "foo")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("baz"))
          .withRemoteMembers(new Member("foo"), new Member("bar"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.LEADER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node3);

    cluster.start();

    node3.instance().cluster().config().addRemoteMember(new Member("foobarbaz"));

    // First, the leader should have replicated a join configuration.
    node1.await().membershipChange();
    Assert.assertNotNull(node1.instance().clusterManager().cluster().remoteMember("foobarbaz"));
    cluster.stop();
  }
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  /**
   * Tests that the leader's reduced cluster configuration is logged and replicated.
   */
  public void testLeaderReplicatesReducedConfiguration() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz", "foobarbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"), new Member("foobarbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz", "foobarbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"), new Member("foobarbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node2);

    TestNode node3 = new TestNode()
      .withCluster("baz", "bar", "foo", "foobarbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("baz"))
          .withRemoteMembers(new Member("foo"), new Member("bar"), new Member("foobarbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.LEADER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node3);

    cluster.start();

    node3.instance().cluster().config().removeRemoteMember(new Member("foobarbaz"));

    // First, the leader should have replicated a join configuration.
    if (node1.instance().clusterManager().cluster().remoteMember("foobarbaz") == null) {
      Assert.assertNull(node1.instance().clusterManager().cluster().remoteMember("foobarbaz"));
    } else {
      node1.await().membershipChange();
      Assert.assertNull(node1.instance().clusterManager().cluster().remoteMember("foobarbaz"));
    }
    cluster.stop();
  }
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  /**
   * Tests that a leader is elected in a single-node cluster.
   */
  public void testSingleNodeClusterLeaderIsElected() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode().withCluster("foo").withProtocol(protocol);
    cluster.addNode(node1);
    cluster.start();
    node1.await().electedLeader();
    Assert.assertTrue(node1.instance().isLeader());
    cluster.stop();
  }
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  /**
   * Tests that a leader is elected in a double-node cluster.
   */
  public void testTwoNodeClusterLeaderIsElected() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode().withCluster("foo", "bar").withProtocol(protocol);
    cluster.addNode(node1);
    TestNode node2 = new TestNode().withCluster("bar", "foo").withProtocol(protocol);
    cluster.addNode(node2);
    cluster.start();
    node1.await().leaderElected();
    Assert.assertTrue(node1.instance().isLeader() || node2.instance().isLeader());
    cluster.stop();
  }
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  /**
   * Tests that a leader is elected in a triple-node cluster.
   */
  public void testThreeNodeClusterLeaderIsElected() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode().withCluster("foo", "bar", "baz").withProtocol(protocol);
    cluster.addNode(node1);
    TestNode node2 = new TestNode().withCluster("bar", "foo", "baz").withProtocol(protocol);
    cluster.addNode(node2);
    TestNode node3 = new TestNode().withCluster("baz", "foo", "bar").withProtocol(protocol);
    cluster.addNode(node3);
    cluster.start();
    node1.await().leaderElected();
    Assert.assertTrue(node1.instance().isLeader() || node2.instance().isLeader() || node3.instance().isLeader());
    cluster.stop();
  }
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  /**
   * Tests that the candidate with the most up-to-date log is elected on startup.
   */
  public void testCandidateWithMostUpToDateLogIsElectedOnStartup() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.CANDIDATE)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.CANDIDATE)
      .withCommitIndex(5)
      .withLastApplied(5);
    cluster.addNode(node2);

    cluster.start();

    node1.await().electedLeader();
    Assert.assertTrue(node1.instance().isLeader());
    cluster.stop();
  }
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  /**
   * Test candidate with most up-to-date log elected after failure.
   */
  public void testCandidateWithMostUpToDateLogIsElectedAfterFailure() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(5)
      .withLastApplied(5)
      .withVotedFor(null);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6)
      .withVotedFor(null);
    cluster.addNode(node2);

    cluster.start();

    node2.await().electedLeader();
    Assert.assertTrue(node2.instance().isLeader());
    cluster.stop();
  }
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  /**
   * Tests that candidates restart an election during a split vote.
   */
  public void testCandidatesIncrementTermAndRestartElectionDuringSplitVote() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.CANDIDATE)
      .withCommitIndex(6)
      .withLastApplied(6)
      .withVotedFor("foo");
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.CANDIDATE)
      .withCommitIndex(5)
      .withLastApplied(5)
      .withVotedFor("bar");
    cluster.addNode(node2);

    cluster.start();

    node1.await().electedLeader();
    Assert.assertTrue(node1.instance().isLeader());
    Assert.assertTrue(node1.instance().currentTerm() > 3);
    cluster.stop();
  }
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  /**
   * Tests that only a single leader is elected when more than one node is equal in terms of state.
   */
  public void testThatOneLeaderElectedWhenTwoNodesAreEqual() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz", "foobar", "barbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"), new Member("foobar"), new Member("barbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz", "foobar", "barbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"), new Member("foobar"), new Member("barbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node2);

    TestNode node3 = new TestNode()
      .withCluster("baz", "bar", "foo", "foobar", "barbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("baz"))
          .withRemoteMembers(new Member("bar"), new Member("foo"), new Member("foobar"), new Member("barbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node3);

    TestNode node4 = new TestNode()
      .withCluster("foobar", "foo", "bar", "baz", "barbaz")
      .withProtocol(protocol)
      .withTerm(3)
      .withLeader(null)
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foobar"))
          .withRemoteMembers(new Member("bar"), new Member("baz"), new Member("foo"), new Member("barbaz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node4);

    cluster.start();

    node1.await().leaderElected();

    int leaderCount = 0;
    for (TestNode node : cluster.nodes()) {
      if (node.instance().isLeader()) {
        leaderCount++;
      }
    }

    Assert.assertEquals(1, leaderCount);
    cluster.stop();
  }
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  /**
   * Tests that the leader takes a snapshot of its state machine and compacts its log.
   */
  public void testLeaderTakesSnapshotAndCompactsLog() {
    Protocol<Member> protocol = new LocalProtocol();
    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withConfig(new CopycatConfig().withMaxLogSize(512))
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withConfig(new CopycatConfig().withMaxLogSize(512))
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("bar"))
          .withRemoteMembers(new Member("foo"), new Member("baz"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node2);

    TestNode node3 = new TestNode()
      .withCluster("baz", "bar", "foo")
      .withProtocol(protocol)
      .withConfig(new CopycatConfig().withMaxLogSize(512))
      .withTerm(3)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(new TestLog()
        .withEntry(new ConfigurationEntry(1, new ClusterConfig()
          .withLocalMember(new Member("baz"))
          .withRemoteMembers(new Member("foo"), new Member("bar"))))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(2, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.LEADER)
      .withCommitIndex(6)
      .withLastApplied(6);
    cluster.addNode(node3);

    cluster.start();

    node3.stateMachine().data("Hello world!");

    AtomicBoolean compacted = new AtomicBoolean();
    node3.log().on().compacted(() -> compacted.set(true));

    node1.instance().submit("command", "Hello world!").thenRun(() -> {
      node1.instance().submit("command", "Hello world!").thenRun(() -> {
        node1.instance().submit("command", "Hello world!").thenRun(() -> {
          node1.instance().submit("command", "Hello world!").thenRun(() -> {
            node1.instance().submit("command", "Hello world!").thenRun(() -> {
            });
          });
        });
      });
    });

    Assert.assertTrue(compacted.get());

    Entry firstEntry = node3.log().firstEntry();
    Assert.assertTrue(firstEntry instanceof SnapshotEntry);
    Assert.assertEquals("Hello world!", new String(((SnapshotEntry) firstEntry).data()));

    cluster.stop();
  }
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Related Classes of net.kuujo.copycat.test.TestCluster

  • net.kuujo.copycat.functional.ConfigurationTest
  • net.kuujo.copycat.functional.LeaderElectionTest
  • net.kuujo.copycat.functional.SnapshotTest
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