Examples with RaftCoreState org.neo4j.causalclustering.core.state.snapshot.RaftCoreState used on opensource projects

Example 6 with RaftCoreState

use of org.neo4j.causalclustering.core.state.snapshot.RaftCoreState in project neo4j by neo4j.

the class RaftMachineTest method shouldNotBecomeLeaderOnMultipleVotesFromSameMember.

@Test
public void shouldNotBecomeLeaderOnMultipleVotesFromSameMember() throws Exception {
    // Given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2, member3, member4))));
    raft.startTimers();
    timeouts.invokeTimeout(ELECTION);
    // When
    raft.handle(voteResponse().from(member1).term(1).grant().build());
    raft.handle(voteResponse().from(member1).term(1).grant().build());
    // Then
    assertThat(raft.isLeader(), is(false));
}

Example 7 with RaftCoreState

use of org.neo4j.causalclustering.core.state.snapshot.RaftCoreState in project neo4j by neo4j.

the class RaftMachineTest method shouldNotBecomeLeaderByVotesFromFutureTerm.

@Test
public void shouldNotBecomeLeaderByVotesFromFutureTerm() throws Exception {
    // Given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    raft.startTimers();
    timeouts.invokeTimeout(ELECTION);
    // When
    raft.handle(voteResponse().from(member1).term(2).grant().build());
    raft.handle(voteResponse().from(member2).term(2).grant().build());
    assertThat(raft.isLeader(), is(false));
    assertEquals(raft.term(), 2L);
}

Example 8 with RaftCoreState

use of org.neo4j.causalclustering.core.state.snapshot.RaftCoreState in project neo4j by neo4j.

the class RaftMachineTest method shouldNotBecomeLeaderByVotesFromOldTerm.

@Test
public void shouldNotBecomeLeaderByVotesFromOldTerm() throws Exception {
    // Given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    raft.startTimers();
    timeouts.invokeTimeout(ELECTION);
    // When
    raft.handle(voteResponse().from(member1).term(0).grant().build());
    raft.handle(voteResponse().from(member2).term(0).grant().build());
    // Then
    assertThat(raft.isLeader(), is(false));
}

Example 9 with RaftCoreState

use of org.neo4j.causalclustering.core.state.snapshot.RaftCoreState in project neo4j by neo4j.

the class RaftMachineTest method shouldNotBecomeLeaderWhenMembersVoteNo.

@Test
public void shouldNotBecomeLeaderWhenMembersVoteNo() throws Exception {
    // Given
    FakeClock fakeClock = Clocks.fakeClock();
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService(fakeClock);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).timeoutService(timeouts).clock(fakeClock).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    raft.startTimers();
    timeouts.invokeTimeout(ELECTION);
    // When
    raft.handle(voteResponse().from(member1).term(1).deny().build());
    raft.handle(voteResponse().from(member2).term(1).deny().build());
    // Then
    assertThat(raft.isLeader(), is(false));
}

Example 10 with RaftCoreState

use of org.neo4j.causalclustering.core.state.snapshot.RaftCoreState in project neo4j by neo4j.

the class RaftMachineTest method shouldMonitorLeaderNotFound.

@Test
public void shouldMonitorLeaderNotFound() throws Exception {
    // Given
    ControlledRenewableTimeoutService timeouts = new ControlledRenewableTimeoutService();
    Monitors monitors = new Monitors();
    LeaderNotFoundMonitor leaderNotFoundMonitor = new StubLeaderNotFoundMonitor();
    monitors.addMonitorListener(leaderNotFoundMonitor);
    RaftMachine raft = new RaftMachineBuilder(myself, 3, RaftTestMemberSetBuilder.INSTANCE).timeoutService(timeouts).monitors(monitors).build();
    raft.installCoreState(new RaftCoreState(new MembershipEntry(0, asSet(myself, member1, member2))));
    try {
        // When
        // There is no leader
        raft.getLeader();
        fail("Should have thrown exception");
    }// Then
     catch (NoLeaderFoundException e) {
        // expected
        assertEquals(1, leaderNotFoundMonitor.leaderNotFoundExceptions());
    }
}