Examples with Outcome org.neo4j.causalclustering.core.consensus.outcome.Outcome used on opensource projects

Example 41 with Outcome

use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.

the class VoteRequestTest method shouldVoteForOnlyOneCandidatePerTerm.

@Test
public void shouldVoteForOnlyOneCandidatePerTerm() throws Exception {
    // given
    RaftState state = newState();
    // when
    final long candidateTerm = state.term() + 1;
    Outcome outcome1 = role.handler.handle(voteRequest().from(member1).term(candidateTerm).lastLogIndex(0).lastLogTerm(-1).build(), state, log());
    state.update(outcome1);
    Outcome outcome2 = role.handler.handle(voteRequest().from(member2).term(candidateTerm).lastLogIndex(0).lastLogTerm(-1).build(), state, log());
    // then
    assertFalse(((RaftMessages.Vote.Response) messageFor(outcome2, member2)).voteGranted());
}

Example 42 with Outcome

use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.

the class RaftStateTest method shouldUpdateCacheState.

@Test
public void shouldUpdateCacheState() throws Exception {
    //Test that updates applied to the raft state will be refelcted in the entry cache.
    //given
    InFlightMap<RaftLogEntry> cache = new InFlightMap<>();
    RaftState raftState = new RaftState(member(0), new InMemoryStateStorage<>(new TermState()), new FakeMembership(), new InMemoryRaftLog(), new InMemoryStateStorage<>(new VoteState()), cache, NullLogProvider.getInstance());
    List<RaftLogCommand> logCommands = new LinkedList<RaftLogCommand>() {

        {
            add(new AppendLogEntry(1, new RaftLogEntry(0L, valueOf(0))));
            add(new AppendLogEntry(2, new RaftLogEntry(0L, valueOf(1))));
            add(new AppendLogEntry(3, new RaftLogEntry(0L, valueOf(2))));
            add(new AppendLogEntry(4, new RaftLogEntry(0L, valueOf(4))));
            add(new TruncateLogCommand(3));
            add(new AppendLogEntry(3, new RaftLogEntry(0L, valueOf(5))));
        }
    };
    Outcome raftTestMemberOutcome = new Outcome(CANDIDATE, 0, null, -1, null, emptySet(), -1, initialFollowerStates(), true, logCommands, emptyOutgoingMessages(), emptySet(), -1, emptySet());
    //when
    raftState.update(raftTestMemberOutcome);
    //then
    assertNotNull(cache.get(1L));
    assertNotNull(cache.get(2L));
    assertNotNull(cache.get(3L));
    assertEquals(valueOf(5), cache.get(3L).content());
    assertNull(cache.get(4L));
}

Example 43 with Outcome

use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.

the class RaftStateTest method shouldRemoveFollowerStateAfterBecomingLeader.

@Test
public void shouldRemoveFollowerStateAfterBecomingLeader() throws Exception {
    // given
    RaftState raftState = new RaftState(member(0), new InMemoryStateStorage<>(new TermState()), new FakeMembership(), new InMemoryRaftLog(), new InMemoryStateStorage<>(new VoteState()), new InFlightMap<>(), NullLogProvider.getInstance());
    raftState.update(new Outcome(CANDIDATE, 1, null, -1, null, emptySet(), -1, initialFollowerStates(), true, emptyLogCommands(), emptyOutgoingMessages(), emptySet(), -1, emptySet()));
    // when
    raftState.update(new Outcome(CANDIDATE, 1, null, -1, null, emptySet(), -1, new FollowerStates<>(), true, emptyLogCommands(), emptyOutgoingMessages(), emptySet(), -1, emptySet()));
    // then
    assertEquals(0, raftState.followerStates().size());
}

Example 44 with Outcome

use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.

the class HeartbeatTest method shouldNotResultInCommitIfReferringToFutureEntries.

@Test
public void shouldNotResultInCommitIfReferringToFutureEntries() throws Exception {
    InMemoryRaftLog raftLog = new InMemoryRaftLog();
    RaftState state = raftState().myself(myself).entryLog(raftLog).build();
    long leaderTerm = state.term() + leaderTermDifference;
    raftLog.append(new RaftLogEntry(leaderTerm, content()));
    RaftMessages.Heartbeat heartbeat = heartbeat().from(leader).commitIndex(// The leader is talking about committing stuff we don't know about
    raftLog.appendIndex() + 1).commitIndexTerm(// And is in the same term
    leaderTerm).leaderTerm(leaderTerm).build();
    Outcome outcome = role.handler.handle(heartbeat, state, log());
    assertThat(outcome.getLogCommands(), empty());
}

Example 45 with Outcome

use of org.neo4j.causalclustering.core.consensus.outcome.Outcome in project neo4j by neo4j.

the class HeartbeatTest method shouldResultInCommitIfHistoryMatches.

@Test
public void shouldResultInCommitIfHistoryMatches() throws Exception {
    InMemoryRaftLog raftLog = new InMemoryRaftLog();
    RaftState state = raftState().myself(myself).entryLog(raftLog).build();
    long leaderTerm = state.term() + leaderTermDifference;
    raftLog.append(new RaftLogEntry(leaderTerm - 1, content()));
    RaftMessages.Heartbeat heartbeat = heartbeat().from(leader).commitIndex(// The leader is talking about committing stuff we don't know about
    raftLog.appendIndex()).commitIndexTerm(// And is in the same term
    leaderTerm).leaderTerm(leaderTerm).build();
    Outcome outcome = role.handler.handle(heartbeat, state, log());
    assertThat(outcome.getLogCommands(), empty());
}