Package net.kuujo.copycat.internal.log

Examples of net.kuujo.copycat.internal.log.SnapshotEntry$Serializer

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  }

  public void testCompactEndOfLog() throws Exception {
    appendEntries();
    log.compact(5,
      new SnapshotEntry(1, new ClusterConfig()
        .withLocalMember(new Member("foo"))
        .withRemoteMembers(new Member("bar"), new Member("baz")), "Hello world!".getBytes()));

    assertEquals(log.firstIndex(), 5);
    assertEquals(log.lastIndex(), 5);
    SnapshotEntry entry = log.getEntry(5);
    assertEquals(entry.term(), 1);
    assertEquals("Hello world!", new String(entry.data()));
  }
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  }

  public void testCompactMiddleOfLog() throws Exception {
    appendEntries();
    log.compact(3,
      new SnapshotEntry(1, new ClusterConfig()
        .withLocalMember(new Member("foo"))
        .withRemoteMembers(new Member("bar"), new Member("baz")), "Hello world!".getBytes()));

    assertEquals(log.firstIndex(), 3);
    assertEquals(log.lastIndex(), 5);
    SnapshotEntry entry = log.getEntry(3);
    assertEquals(entry.term(), 1);
    assertEquals("Hello world!", new String(entry.data()));
    OperationEntry entry2 = log.getEntry(4);
    assertEquals(entry2.term(), 1);
    assertEquals("bar", entry2.operation());
    OperationEntry entry3 = log.getEntry(5);
    assertEquals(entry3.term(), 1);
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    log.appendEntry(new OperationEntry(1, "foo", "bar"));
    assertNotEquals(size, size = log.size());
  }

  private void appendEntries() {
    log.appendEntry(new SnapshotEntry(1, new ClusterConfig()
      .withLocalMember(new Member("foo"))
      .withRemoteMembers(new Member("bar"), new Member("baz")), new byte[10]));
    log.appendEntry(new ConfigurationEntry(1, new ClusterConfig()
      .withLocalMember(new Member("foo"))
      .withRemoteMembers(new Member("bar"), new Member("baz"))));
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        ConfigurationEntry.class,
        new ConfigurationEntry(1, new ClusterConfig().withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz")))},
      {
        SnapshotEntry.class,
        new SnapshotEntry(1, new ClusterConfig().withLocalMember(new Member("foo"))
          .withRemoteMembers(new Member("bar"), new Member("baz")), new byte[] {1, 2, 3})}};
  }
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   * @return A snapshot of the state machine state.
   */
  protected SnapshotEntry createSnapshot() {
    byte[] snapshot = context.stateMachineExecutor().stateMachine().takeSnapshot();
    if (snapshot != null) {
      return new SnapshotEntry(context.currentTerm(), context.clusterManager().cluster().config().copy(), snapshot);
    }
    return null;
  }
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    // out-of-sync followers.
    if (context.log().size() > context.config().getMaxLogSize()) {
      synchronized (context.log()) {
        logger().info("{} - Compacting log", context.clusterManager().localNode());
        final long lastApplied = context.lastApplied();
        final SnapshotEntry snapshot = createSnapshot();
        if (snapshot != null) {
          try {
            context.log().compact(lastApplied, snapshot);
          } catch (IOException e) {
            throw new CopycatException(e, "Failed to compact log.");
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   */
  public void testWriteReadSyncRequest() {
    ClusterConfig<Member> clusterConfig = new ClusterConfig<>()
      .withLocalMember(new Member(new MemberConfig("foo")))
      .withRemoteMembers(new Member(new MemberConfig("bar")), new Member(new MemberConfig("baz")));
    SnapshotEntry snapshotEntry = new SnapshotEntry(1, clusterConfig, new byte[50]);
    ConfigurationEntry configurationEntry = new ConfigurationEntry(1, clusterConfig);
    OperationEntry operationEntry = new OperationEntry(1, "foo", Arrays.asList("bar", "baz"));
    List<Entry> entries = Arrays.asList(snapshotEntry, configurationEntry, operationEntry);
    SyncRequest request = new SyncRequest(UUID.randomUUID().toString(), 1, "foo", 4, 1, entries, 3);
    SyncRequest result = reader.readRequest(writer.writeRequest(request));
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      .withLocalMember(new Member("foo"))
      .withRemoteMembers(new Member("bar"), new Member("baz"))));
    for (long i = 0; i < 1000; i++) {
      log1.appendEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")));
    }
    SnapshotEntry snapshot1 = new SnapshotEntry(1, new ClusterConfig()
      .withLocalMember(new Member("foo"))
      .withRemoteMembers(new Member("bar"), new Member("baz")),
      "Hello world!".getBytes());
    log1.compact(800, snapshot1);

    TestCluster cluster = new TestCluster();
    TestNode node1 = new TestNode()
      .withCluster("foo", "bar", "baz")
      .withProtocol(protocol)
      .withTerm(1)
      .withLeader("baz")
      .withStateMachine(new TestStateMachine())
      .withLog(log1)
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(999)
      .withLastApplied(999);
    cluster.addNode(node1);

    TestNode node2 = new TestNode()
      .withCluster("bar", "foo", "baz")
      .withProtocol(protocol)
      .withTerm(1)
      .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(1, "foo", Arrays.asList("bar", "baz")))
        .withEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz"))))
      .withState(CopycatState.FOLLOWER)
      .withCommitIndex(0)
      .withLastApplied(0);
    cluster.addNode(node2);

    TestLog log3 = new TestLog();
    log1.appendEntry(new ConfigurationEntry(1, new ClusterConfig()
      .withLocalMember(new Member("baz"))
      .withRemoteMembers(new Member("bar"), new Member("foo"))));
    for (long i = 0; i < 1000; i++) {
      log3.appendEntry(new OperationEntry(1, "foo", Arrays.asList("bar", "baz")));
    }
    SnapshotEntry snapshot3 = new SnapshotEntry(1, new ClusterConfig()
      .withLocalMember(new Member("baz"))
      .withRemoteMembers(new Member("bar"), new Member("foo")),
      "Hello world!".getBytes());
    log3.compact(800, snapshot3);
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  }

  public void testCompactEndOfLog() throws Exception {
    appendEntries();
    log.compact(5,
      new SnapshotEntry(1, new ClusterConfig()
        .withLocalMember(new Member("foo"))
        .withRemoteMembers(new Member("bar"), new Member("baz")), "Hello world!".getBytes()));

    assertEquals(log.firstIndex(), 5);
    assertEquals(log.lastIndex(), 5);
    SnapshotEntry entry = log.getEntry(5);
    assertEquals(entry.term(), 1);
    assertEquals("Hello world!", new String(entry.data()));
  }
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  }

  public void testCompactMiddleOfLog() throws Exception {
    appendEntries();
    log.compact(3,
      new SnapshotEntry(1, new ClusterConfig()
        .withLocalMember(new Member("foo"))
        .withRemoteMembers(new Member("bar"), new Member("baz")), "Hello world!".getBytes()));

    assertEquals(log.firstIndex(), 3);
    assertEquals(log.lastIndex(), 5);
    SnapshotEntry entry = log.getEntry(3);
    assertEquals(entry.term(), 1);
    assertEquals("Hello world!", new String(entry.data()));
    OperationEntry entry2 = log.getEntry(4);
    assertEquals(entry2.term(), 1);
    assertEquals("bar", entry2.operation());
    OperationEntry entry3 = log.getEntry(5);
    assertEquals(entry3.term(), 1);
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