Examples with MessageHolder org.neo4j.cluster.com.message.MessageHolder used on opensource projects

Example 1 with MessageHolder

use of org.neo4j.cluster.com.message.MessageHolder in project neo4j by neo4j.

the class ElectionStateTest method shouldSendAtomicBroadcastOnJoiningAClusterWithAnEstablishedCoordinator.

@Test
public void shouldSendAtomicBroadcastOnJoiningAClusterWithAnEstablishedCoordinator() throws Throwable {
    // Given
    String winnerURI = "some://winner";
    InstanceId winner = new InstanceId(2);
    final List<Message<?>> messages = new ArrayList<>(1);
    MessageHolder holder = new MessageHolder() {

        @Override
        public void offer(Message<? extends MessageType> message) {
            messages.add(message);
        }
    };
    ElectionCredentials voteCredentialComparable = mock(ElectionCredentials.class);
    ElectionContext electionContext = mock(ElectionContext.class);
    when(electionContext.voted(eq(COORDINATOR), eq(new InstanceId(1)), eq(voteCredentialComparable), anyLong())).thenReturn(true);
    when(electionContext.getVoteCount(COORDINATOR)).thenReturn(3);
    when(electionContext.getNeededVoteCount()).thenReturn(3);
    when(electionContext.getElectionWinner(COORDINATOR)).thenReturn(winner);
    when(electionContext.getLog(any(Class.class))).thenReturn(NullLog.getInstance());
    when(electionContext.newConfigurationStateChange()).thenReturn(mock(ClusterMessage.VersionedConfigurationStateChange.class));
    when(electionContext.getUriForId(winner)).thenReturn(URI.create(winnerURI));
    // When
    Message<ElectionMessage> votedMessage = Message.to(ElectionMessage.voted, URI.create("some://instance"), new ElectionMessage.VotedData(COORDINATOR, new InstanceId(1), voteCredentialComparable));
    votedMessage.setHeader(Message.FROM, "some://other");
    election.handle(electionContext, votedMessage, holder);
    // Then
    assertEquals(1, messages.size());
    Message<?> message = messages.get(0);
    assertEquals(AtomicBroadcastMessage.broadcast, message.getMessageType());
}

Example 2 with MessageHolder

use of org.neo4j.cluster.com.message.MessageHolder in project neo4j by neo4j.

the class ElectionStateTest method electionShouldRemainLocalIfStartedBySingleInstanceWhichIsTheRoleHolder.

@Test
public void electionShouldRemainLocalIfStartedBySingleInstanceWhichIsTheRoleHolder() throws Throwable {
    /*
         * Ensures that when an instance is alone in the cluster, elections for roles that it holds do not set
         * timeouts or try to reach other instances.
         */
    // Given
    ElectionContext context = mock(ElectionContext.class);
    ClusterContext clusterContextMock = mock(ClusterContext.class);
    when(clusterContextMock.getLog(Matchers.<Class>any())).thenReturn(NullLog.getInstance());
    MessageHolder holder = mock(MessageHolder.class);
    // These mean the election can proceed normally, by us
    when(context.electionOk()).thenReturn(true);
    when(context.isInCluster()).thenReturn(true);
    when(context.isElector()).thenReturn(true);
    // Like it says on the box, we are the only instance
    final InstanceId myInstanceId = new InstanceId(1);
    Map<InstanceId, URI> members = new HashMap<InstanceId, URI>();
    members.put(myInstanceId, URI.create("ha://me"));
    when(context.getMembers()).thenReturn(members);
    // Any role would do, just make sure we have it
    final String role = "master";
    ElectionContext.VoteRequest voteRequest = new ElectionContext.VoteRequest(role, 13);
    when(context.getPossibleRoles()).thenReturn(Collections.<ElectionRole>singletonList(new ElectionRole(role)));
    when(context.getElected(role)).thenReturn(myInstanceId);
    when(context.voteRequestForRole(new ElectionRole(role))).thenReturn(voteRequest);
    // Required for logging
    when(context.getLog(Mockito.<Class>any())).thenReturn(NullLog.getInstance());
    // When
    election.handle(context, Message.<ElectionMessage>internal(performRoleElections), holder);
    // Then
    // Make sure that we asked ourselves to vote for that role and that no timer was set
    verify(holder, times(1)).offer(Matchers.argThat(new MessageArgumentMatcher<ElectionMessage>().onMessageType(ElectionMessage.vote).withPayload(voteRequest)));
    verify(context, times(0)).setTimeout(Matchers.<String>any(), Matchers.<Message>any());
}

Example 3 with MessageHolder

use of org.neo4j.cluster.com.message.MessageHolder in project neo4j by neo4j.

the class ElectionStateTest method timeoutMakesElectionBeForgotten.

@Test
public void timeoutMakesElectionBeForgotten() throws Throwable {
    // Given
    String coordinatorRole = "coordinator";
    ElectionContext context = mock(ElectionContext.class);
    when(context.getLog(Mockito.<Class>any())).thenReturn(NullLog.getInstance());
    MessageHolder holder = mock(MessageHolder.class);
    Message timeout = Message.timeout(ElectionMessage.electionTimeout, Message.internal(performRoleElections), new ElectionState.ElectionTimeoutData(coordinatorRole, null));
    // When
    election.handle(context, timeout, holder);
    // Then
    verify(context, times(1)).forgetElection(coordinatorRole);
}

Example 4 with MessageHolder

use of org.neo4j.cluster.com.message.MessageHolder in project neo4j by neo4j.

the class HeartbeatIAmAliveProcessorTest method shouldNotGenerateHeartbeatsForSuspicions.

@Test
public void shouldNotGenerateHeartbeatsForSuspicions() throws Exception {
    URI to = URI.create("ha://1");
    // GIVEN
    MessageHolder outgoing = mock(MessageHolder.class);
    ClusterContext mockContext = mock(ClusterContext.class);
    ClusterConfiguration mockConfiguration = mock(ClusterConfiguration.class);
    when(mockConfiguration.getMembers()).thenReturn(new HashMap<InstanceId, URI>() {

        {
            put(new InstanceId(1), URI.create("ha://1"));
            put(new InstanceId(2), URI.create("ha://2"));
        }
    });
    when(mockContext.getConfiguration()).thenReturn(mockConfiguration);
    HeartbeatIAmAliveProcessor processor = new HeartbeatIAmAliveProcessor(outgoing, mockContext);
    Message incoming = Message.to(HeartbeatMessage.suspicions, to).setHeader(Message.FROM, to.toASCIIString()).setHeader(Message.INSTANCE_ID, "1");
    assertEquals(HeartbeatMessage.suspicions, incoming.getMessageType());
    // WHEN
    processor.process(incoming);
    // THEN
    verifyZeroInteractions(outgoing);
}

Example 5 with MessageHolder

use of org.neo4j.cluster.com.message.MessageHolder in project neo4j by neo4j.

the class HeartbeatIAmAliveProcessorTest method shouldNotGenerateHeartbeatsForHeartbeats.

@Test
public void shouldNotGenerateHeartbeatsForHeartbeats() throws Exception {
    URI to = URI.create("ha://1");
    // GIVEN
    MessageHolder outgoing = mock(MessageHolder.class);
    ClusterContext mockContext = mock(ClusterContext.class);
    ClusterConfiguration mockConfiguration = mock(ClusterConfiguration.class);
    when(mockConfiguration.getMembers()).thenReturn(new HashMap<InstanceId, URI>() {

        {
            put(new InstanceId(1), URI.create("ha://1"));
            put(new InstanceId(2), URI.create("ha://2"));
        }
    });
    when(mockContext.getConfiguration()).thenReturn(mockConfiguration);
    HeartbeatIAmAliveProcessor processor = new HeartbeatIAmAliveProcessor(outgoing, mockContext);
    Message incoming = Message.to(HeartbeatMessage.i_am_alive, to).setHeader(Message.FROM, to.toASCIIString()).setHeader(Message.INSTANCE_ID, "1");
    assertEquals(HeartbeatMessage.i_am_alive, incoming.getMessageType());
    // WHEN
    processor.process(incoming);
    // THEN
    verifyZeroInteractions(outgoing);
}