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

Example 1 with RaftMachineBuilder

use of org.neo4j.causalclustering.core.consensus.RaftMachineBuilder in project neo4j by neo4j.

the class AppendEntriesMessageFlowTest method setup.

@Before
public void setup() throws IOException {
    // given
    RaftLog raftLog = new InMemoryRaftLog();
    raftLog.append(new RaftLogEntry(0, new RaftTestGroup(0)));
    raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).raftLog(raftLog).outbound(outbound).build();
}

Example 2 with RaftMachineBuilder

use of org.neo4j.causalclustering.core.consensus.RaftMachineBuilder in project neo4j by neo4j.

the class ElectionTest method candidateShouldLoseElectionAndRemainCandidate.

@Test
public void candidateShouldLoseElectionAndRemainCandidate() throws Exception {
    // Note the etcd implementation seems to diverge from the paper here, since the paper suggests that it should
    // remain as a candidate
    // given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).outbound(outbound).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    raft.startTimers();
    timeouts.invokeTimeout(RaftMachine.Timeouts.ELECTION);
    // when
    raft.handle(voteResponse().from(member1).term(1).deny().build());
    raft.handle(voteResponse().from(member2).term(1).deny().build());
    // then
    assertEquals(1, raft.term());
    assertEquals(CANDIDATE, raft.currentRole());
    verify(outbound, never()).send(eq(member1), isA(RaftMessages.AppendEntries.Request.class));
    verify(outbound, never()).send(eq(member2), isA(RaftMessages.AppendEntries.Request.class));
}

Example 3 with RaftMachineBuilder

use of org.neo4j.causalclustering.core.consensus.RaftMachineBuilder in project neo4j by neo4j.

the class ElectionTest method candidateShouldWinElectionAndBecomeLeader.

@Test
public void candidateShouldWinElectionAndBecomeLeader() throws Exception {
    // given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).outbound(outbound).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    raft.startTimers();
    timeouts.invokeTimeout(RaftMachine.Timeouts.ELECTION);
    // when
    raft.handle(voteResponse().from(member1).term(1).grant().build());
    raft.handle(voteResponse().from(member2).term(1).grant().build());
    // then
    assertEquals(1, raft.term());
    assertEquals(LEADER, raft.currentRole());
    verify(outbound).send(eq(member1), isA(RaftMessages.AppendEntries.Request.class));
    verify(outbound).send(eq(member2), isA(RaftMessages.AppendEntries.Request.class));
}

Example 4 with RaftMachineBuilder

use of org.neo4j.causalclustering.core.consensus.RaftMachineBuilder in project neo4j by neo4j.

the class ElectionTest method candidateShouldVoteForTheSameCandidateInTheSameTerm.

@Test
public void candidateShouldVoteForTheSameCandidateInTheSameTerm() throws Exception {
    // given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).outbound(outbound).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    // when
    raft.handle(voteRequest().from(member1).candidate(member1).term(1).build());
    raft.handle(voteRequest().from(member1).candidate(member1).term(1).build());
    // then
    verify(outbound, times(2)).send(member1, voteResponse().term(1).grant().build());
}