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

Example 6 with DirectNetworking

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

the class RaftGroupMembershipTest method shouldAddSingleInstanceToExistingRaftGroup.

@Test
public void shouldAddSingleInstanceToExistingRaftGroup() throws Exception {
    // given
    DirectNetworking net = new DirectNetworking();
    final MemberId leader = member(0);
    final MemberId stable1 = member(1);
    final MemberId stable2 = member(2);
    final MemberId toBeAdded = member(3);
    final MemberId[] initialMembers = { leader, stable1, stable2 };
    final MemberId[] finalMembers = { leader, stable1, stable2, toBeAdded };
    RaftTestFixture fixture = new RaftTestFixture(net, 3, finalMembers);
    fixture.bootstrap(initialMembers);
    fixture.members().withId(leader).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    // when
    fixture.members().withId(leader).raftInstance().setTargetMembershipSet(new RaftTestGroup(finalMembers).getMembers());
    net.processMessages();
    fixture.members().withId(leader).timeoutService().invokeTimeout(HEARTBEAT);
    net.processMessages();
    // then
    assertThat(fixture.members().withIds(finalMembers), hasCurrentMembers(new RaftTestGroup(finalMembers)));
    assertEquals(1, fixture.members().withRole(LEADER).size());
    assertEquals(3, fixture.members().withRole(FOLLOWER).size());
}

Example 7 with DirectNetworking

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

the class RaftGroupMembershipTest method shouldRemoveMultipleInstancesFromExistingRaftGroup.

@Test
public void shouldRemoveMultipleInstancesFromExistingRaftGroup() throws Exception {
    DirectNetworking net = new DirectNetworking();
    // given
    final MemberId leader = member(0);
    final MemberId stable = member(1);
    final MemberId toBeRemoved1 = member(2);
    final MemberId toBeRemoved2 = member(3);
    final MemberId toBeRemoved3 = member(4);
    final MemberId[] initialMembers = { leader, stable, toBeRemoved1, toBeRemoved2, toBeRemoved3 };
    final MemberId[] finalMembers = { leader, stable };
    RaftTestFixture fixture = new RaftTestFixture(net, 2, initialMembers);
    fixture.bootstrap(initialMembers);
    fixture.members().withId(leader).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    // when
    fixture.members().withId(leader).raftInstance().setTargetMembershipSet(new RaftTestGroup(finalMembers).getMembers());
    net.processMessages();
    // then
    assertThat(fixture.members().withIds(finalMembers), hasCurrentMembers(new RaftTestGroup(finalMembers)));
    assertEquals(1, fixture.members().withIds(finalMembers).withRole(LEADER).size());
    assertEquals(1, fixture.members().withIds(finalMembers).withRole(FOLLOWER).size());
}

Example 8 with DirectNetworking

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

the class RaftGroupMembershipTest method shouldRemoveLeaderFromExistingRaftGroupAndActivelyTransferLeadership.

@Test
public void shouldRemoveLeaderFromExistingRaftGroupAndActivelyTransferLeadership() throws Exception {
    DirectNetworking net = new DirectNetworking();
    // given
    final MemberId leader = member(0);
    final MemberId stable1 = member(1);
    final MemberId stable2 = member(2);
    final MemberId[] initialMembers = { leader, stable1, stable2 };
    final MemberId[] finalMembers = { stable1, stable2 };
    RaftTestFixture fixture = new RaftTestFixture(net, 2, initialMembers);
    fixture.bootstrap(initialMembers);
    fixture.members().withId(leader).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    // when
    fixture.members().withId(leader).raftInstance().setTargetMembershipSet(new RaftTestGroup(finalMembers).getMembers());
    net.processMessages();
    fixture.members().withId(stable1).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    // then
    assertThat(fixture.members().withIds(finalMembers), hasCurrentMembers(new RaftTestGroup(finalMembers)));
    assertTrue(fixture.members().withId(stable1).raftInstance().isLeader() || fixture.members().withId(stable2).raftInstance().isLeader());
}

Example 9 with DirectNetworking

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

the class RaftGroupMembershipTest method shouldRemoveLeaderAndAddItBackIn.

@Test
public void shouldRemoveLeaderAndAddItBackIn() throws Exception {
    DirectNetworking net = new DirectNetworking();
    // given
    final MemberId leader1 = member(0);
    final MemberId leader2 = member(1);
    final MemberId stable1 = member(2);
    final MemberId stable2 = member(3);
    final MemberId[] allMembers = { leader1, leader2, stable1, stable2 };
    final MemberId[] fewerMembers = { leader2, stable1, stable2 };
    RaftTestFixture fixture = new RaftTestFixture(net, 3, allMembers);
    fixture.bootstrap(allMembers);
    // when
    fixture.members().withId(leader1).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    fixture.members().withId(leader1).raftInstance().setTargetMembershipSet(new RaftTestGroup(fewerMembers).getMembers());
    net.processMessages();
    fixture.members().withId(leader2).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    fixture.members().withId(leader2).raftInstance().setTargetMembershipSet(new RaftTestGroup(allMembers).getMembers());
    net.processMessages();
    fixture.members().withId(leader2).timeoutService().invokeTimeout(HEARTBEAT);
    net.processMessages();
    // then
    assertTrue(fixture.members().withId(leader2).raftInstance().isLeader());
    assertThat(fixture.members().withIds(allMembers), hasCurrentMembers(new RaftTestGroup(allMembers)));
}

Example 10 with DirectNetworking

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

the class RaftGroupMembershipTest method shouldRemoveFollowerAndAddItBackIn.

@Test
public void shouldRemoveFollowerAndAddItBackIn() throws Exception {
    DirectNetworking net = new DirectNetworking();
    // given
    final MemberId leader = member(0);
    final MemberId unstable = member(1);
    final MemberId stable1 = member(2);
    final MemberId stable2 = member(3);
    final MemberId[] allMembers = { leader, unstable, stable1, stable2 };
    final MemberId[] fewerMembers = { leader, stable1, stable2 };
    RaftTestFixture fixture = new RaftTestFixture(net, 3, allMembers);
    fixture.bootstrap(allMembers);
    // when
    fixture.members().withId(leader).timeoutService().invokeTimeout(ELECTION);
    net.processMessages();
    fixture.members().withId(leader).raftInstance().setTargetMembershipSet(new RaftTestGroup(fewerMembers).getMembers());
    net.processMessages();
    assertTrue(fixture.members().withId(leader).raftInstance().isLeader());
    assertThat(fixture.members().withIds(fewerMembers), hasCurrentMembers(new RaftTestGroup(fewerMembers)));
    fixture.members().withId(leader).raftInstance().setTargetMembershipSet(new RaftTestGroup(allMembers).getMembers());
    net.processMessages();
    fixture.members().withId(leader).timeoutService().invokeTimeout(HEARTBEAT);
    net.processMessages();
    // then
    assertTrue(fixture.members().withId(leader).raftInstance().isLeader());
    assertThat(fixture.members().withIds(allMembers), hasCurrentMembers(new RaftTestGroup(allMembers)));
}