Examples with Master org.neo4j.kernel.ha.com.master.Master used on opensource projects

Example 1 with Master

use of org.neo4j.kernel.ha.com.master.Master in project neo4j by neo4j.

the class SlaveLocksClientTest method setUp.

@Before
public void setUp() throws Exception {
    master = mock(Master.class);
    availabilityGuard = new AvailabilityGuard(Clocks.fakeClock(), getInstance());
    lockManager = new CommunityLockManger(Config.defaults(), Clocks.systemClock());
    local = spy(lockManager.newClient());
    logProvider = new AssertableLogProvider();
    LockResult lockResultOk = new LockResult(LockStatus.OK_LOCKED);
    TransactionStreamResponse<LockResult> responseOk = new TransactionStreamResponse<>(lockResultOk, null, TransactionStream.EMPTY, ResourceReleaser.NO_OP);
    whenMasterAcquireShared().thenReturn(responseOk);
    whenMasterAcquireExclusive().thenReturn(responseOk);
    client = new SlaveLocksClient(master, local, lockManager, mock(RequestContextFactory.class), availabilityGuard, logProvider);
}

Example 2 with Master

use of org.neo4j.kernel.ha.com.master.Master in project neo4j by neo4j.

the class HighAvailabilityMemberStateMachineTest method whenHAModeSwitcherSwitchesToSlaveTheOtherModeSwitcherDoNotGetTheOldMasterClient.

@Test
public void whenHAModeSwitcherSwitchesToSlaveTheOtherModeSwitcherDoNotGetTheOldMasterClient() throws Throwable {
    InstanceId me = new InstanceId(1);
    StoreId storeId = newStoreIdForCurrentVersion();
    HighAvailabilityMemberContext context = mock(HighAvailabilityMemberContext.class);
    when(context.getMyId()).thenReturn(me);
    AvailabilityGuard guard = mock(AvailabilityGuard.class);
    ObservedClusterMembers members = mock(ObservedClusterMembers.class);
    ClusterMember masterMember = mock(ClusterMember.class);
    when(masterMember.getHARole()).thenReturn("master");
    when(masterMember.hasRole("master")).thenReturn(true);
    when(masterMember.getInstanceId()).thenReturn(new InstanceId(2));
    when(masterMember.getStoreId()).thenReturn(storeId);
    ClusterMember self = new ClusterMember(me);
    when(members.getMembers()).thenReturn(Arrays.asList(self, masterMember));
    when(members.getCurrentMember()).thenReturn(self);
    DependencyResolver dependencyResolver = mock(DependencyResolver.class);
    FileSystemAbstraction fs = mock(FileSystemAbstraction.class);
    when(fs.fileExists(any(File.class))).thenReturn(true);
    when(dependencyResolver.resolveDependency(FileSystemAbstraction.class)).thenReturn(fs);
    when(dependencyResolver.resolveDependency(Monitors.class)).thenReturn(new Monitors());
    NeoStoreDataSource dataSource = mock(NeoStoreDataSource.class);
    when(dataSource.getDependencyResolver()).thenReturn(dependencyResolver);
    when(dataSource.getStoreId()).thenReturn(storeId);
    when(dependencyResolver.resolveDependency(NeoStoreDataSource.class)).thenReturn(dataSource);
    when(dependencyResolver.resolveDependency(TransactionIdStore.class)).thenReturn(new DeadSimpleTransactionIdStore());
    when(dependencyResolver.resolveDependency(ObservedClusterMembers.class)).thenReturn(members);
    UpdatePuller updatePuller = mock(UpdatePuller.class);
    when(updatePuller.tryPullUpdates()).thenReturn(true);
    when(dependencyResolver.resolveDependency(UpdatePuller.class)).thenReturn(updatePuller);
    ClusterMemberAvailability clusterMemberAvailability = mock(ClusterMemberAvailability.class);
    final TriggerableClusterMemberEvents events = new TriggerableClusterMemberEvents();
    Election election = mock(Election.class);
    HighAvailabilityMemberStateMachine stateMachine = new HighAvailabilityMemberStateMachine(context, guard, members, events, election, NullLogProvider.getInstance());
    ClusterMembers clusterMembers = new ClusterMembers(members, stateMachine);
    when(dependencyResolver.resolveDependency(ClusterMembers.class)).thenReturn(clusterMembers);
    stateMachine.init();
    stateMachine.start();
    final DelegateInvocationHandler<Master> handler = new DelegateInvocationHandler<>(Master.class);
    MasterClientResolver masterClientResolver = mock(MasterClientResolver.class);
    MasterClient masterClient = mock(MasterClient.class);
    when(masterClient.getProtocolVersion()).thenReturn(MasterClient214.PROTOCOL_VERSION);
    when(masterClient.handshake(anyLong(), any(StoreId.class))).thenReturn(new Response<HandshakeResult>(new HandshakeResult(0, 42), storeId, mock(ResourceReleaser.class)) {

        @Override
        public void accept(Handler handler) throws IOException {
        }

        @Override
        public boolean hasTransactionsToBeApplied() {
            return false;
        }
    });
    when(masterClient.toString()).thenReturn("TheExpectedMasterClient!");
    when(masterClientResolver.instantiate(anyString(), anyInt(), anyString(), any(Monitors.class), any(StoreId.class), any(LifeSupport.class))).thenReturn(masterClient);
    final CountDownLatch latch = new CountDownLatch(2);
    final AtomicBoolean switchedSuccessfully = new AtomicBoolean();
    SwitchToSlave.Monitor monitor = new SwitchToSlave.Monitor() {

        @Override
        public void switchToSlaveCompleted(boolean wasSuccessful) {
            switchedSuccessfully.set(wasSuccessful);
            latch.countDown();
        }
    };
    Config config = Config.embeddedDefaults(Collections.singletonMap(ClusterSettings.server_id.name(), me.toString()));
    TransactionStats transactionCounters = mock(TransactionStats.class);
    when(transactionCounters.getNumberOfActiveTransactions()).thenReturn(0L);
    PageCache pageCacheMock = mock(PageCache.class);
    PagedFile pagedFileMock = mock(PagedFile.class);
    when(pagedFileMock.getLastPageId()).thenReturn(1L);
    when(pageCacheMock.map(any(File.class), anyInt())).thenReturn(pagedFileMock);
    TransactionIdStore transactionIdStoreMock = mock(TransactionIdStore.class);
    when(transactionIdStoreMock.getLastCommittedTransaction()).thenReturn(new TransactionId(0, 0, 0));
    SwitchToSlaveCopyThenBranch switchToSlave = new SwitchToSlaveCopyThenBranch(new File(""), NullLogService.getInstance(), mock(FileSystemAbstraction.class), config, dependencyResolver, mock(HaIdGeneratorFactory.class), handler, mock(ClusterMemberAvailability.class), mock(RequestContextFactory.class), mock(PullerFactory.class, RETURNS_MOCKS), Iterables.empty(), masterClientResolver, monitor, new StoreCopyClient.Monitor.Adapter(), Suppliers.singleton(dataSource), Suppliers.singleton(transactionIdStoreMock), slave -> {
        SlaveServer mock = mock(SlaveServer.class);
        when(mock.getSocketAddress()).thenReturn(new InetSocketAddress("localhost", 123));
        return mock;
    }, updatePuller, pageCacheMock, mock(Monitors.class), transactionCounters);
    ComponentSwitcherContainer switcherContainer = new ComponentSwitcherContainer();
    HighAvailabilityModeSwitcher haModeSwitcher = new HighAvailabilityModeSwitcher(switchToSlave, mock(SwitchToMaster.class), election, clusterMemberAvailability, mock(ClusterClient.class), storeSupplierMock(), me, switcherContainer, neoStoreDataSourceSupplierMock(), NullLogService.getInstance());
    haModeSwitcher.init();
    haModeSwitcher.start();
    haModeSwitcher.listeningAt(URI.create("http://localhost:12345"));
    stateMachine.addHighAvailabilityMemberListener(haModeSwitcher);
    final AtomicReference<Master> ref = new AtomicReference<>(null);
    //noinspection unchecked
    AbstractComponentSwitcher<Object> otherModeSwitcher = new AbstractComponentSwitcher<Object>(mock(DelegateInvocationHandler.class)) {

        @Override
        protected Object getSlaveImpl() {
            Master master = handler.cement();
            ref.set(master);
            latch.countDown();
            return null;
        }

        @Override
        protected Object getMasterImpl() {
            return null;
        }
    };
    switcherContainer.add(otherModeSwitcher);
    // When
    events.switchToSlave(me);
    // Then
    latch.await();
    assertTrue("mode switch failed", switchedSuccessfully.get());
    Master actual = ref.get();
    // let's test the toString()s since there are too many wrappers of proxies
    assertEquals(masterClient.toString(), actual.toString());
    stateMachine.stop();
    stateMachine.shutdown();
    haModeSwitcher.stop();
    haModeSwitcher.shutdown();
}

Example 3 with Master

use of org.neo4j.kernel.ha.com.master.Master in project neo4j by neo4j.

the class SlaveTransactionCommitProcessTest method setUp.

@Before
public void setUp() {
    lastSeenEventIdentifier = new AtomicInteger(-1);
    master = mock(Master.class);
    requestContext = new RequestContext(10, 11, 12, 13, 14);
    reqFactory = new ConstantRequestContextFactory(requestContext) {

        @Override
        public RequestContext newRequestContext(int eventIdentifier) {
            lastSeenEventIdentifier.set(eventIdentifier);
            return super.newRequestContext(eventIdentifier);
        }
    };
    response = new LongResponse(42L);
    tx = new PhysicalTransactionRepresentation(Collections.<StorageCommand>emptyList());
    tx.setHeader(new byte[] {}, 1, 1, 1, 1, 1, 1337);
    commitProcess = new SlaveTransactionCommitProcess(master, reqFactory);
}

Example 4 with Master

use of org.neo4j.kernel.ha.com.master.Master in project neo4j by neo4j.

the class SwitchToMaster method switchToMaster.

/**
     * Performs a switch to the master state. Starts communication endpoints, switches components to the master state
     * and broadcasts the appropriate Master Is Available event.
     * @param haCommunicationLife The LifeSupport instance to register communication endpoints.
     * @param me The URI that the communication endpoints should bind to
     * @return The URI at which the master communication was bound.
     */
public URI switchToMaster(LifeSupport haCommunicationLife, URI me) {
    userLog.info("I am %s, moving to master", myId(config));
    // Do not wait for currently active transactions to complete before continuing switching.
    // - A master in a cluster is very important, without it the cluster cannot process any write requests
    // - Awaiting open transactions to complete assumes that this instance just now was a slave that is
    //   switching to master, which means the previous master where these active transactions were hosted
    //   is no longer available so these open transactions cannot continue and complete anyway,
    //   so what's the point waiting for them?
    // - Read transactions may still be able to complete, but the correct response to failures in those
    //   is to have them throw transient error exceptions hinting that they should be retried,
    //   at which point they may get redirected to another instance, or to this instance if it has completed
    //   the switch until then.
    idGeneratorFactory.switchToMaster();
    NeoStoreDataSource neoStoreXaDataSource = dataSourceSupplier.get();
    neoStoreXaDataSource.afterModeSwitch();
    ConversationManager conversationManager = conversationManagerFactory.newInstance();
    Master master = masterFactory.apply(conversationManager, haCommunicationLife);
    MasterServer masterServer = masterServerFactory.apply(master, conversationManager);
    haCommunicationLife.add(masterServer);
    masterDelegateHandler.setDelegate(master);
    haCommunicationLife.start();
    URI masterHaURI = getMasterUri(me, masterServer, config);
    clusterMemberAvailability.memberIsAvailable(MASTER, masterHaURI, neoStoreXaDataSource.getStoreId());
    userLog.info("I am %s, successfully moved to master", myId(config));
    slaveFactorySupplier.get().setStoreId(neoStoreXaDataSource.getStoreId());
    return masterHaURI;
}

Example 5 with Master

use of org.neo4j.kernel.ha.com.master.Master in project neo4j by neo4j.

the class SlaveLockManagerTest method setUp.

@Before
public void setUp() {
    requestContextFactory = new RequestContextFactory(1, singleton(mock(TransactionIdStore.class)));
    master = mock(Master.class);
    availabilityGuard = new AvailabilityGuard(Clocks.systemClock(), getInstance());
}