Examples with ZKHelixDataAccessor org.apache.helix.manager.zk.ZKHelixDataAccessor used on opensource projects

Example 46 with ZKHelixDataAccessor

use of org.apache.helix.manager.zk.ZKHelixDataAccessor in project helix by apache.

the class TestCustomizedIdealStateRebalancer method testCustomizedIdealStateRebalancer.

@Test
public void testCustomizedIdealStateRebalancer() throws InterruptedException {
    _setupTool.addResourceToCluster(CLUSTER_NAME, db2, 60, "MasterSlave");
    _setupTool.addResourceProperty(CLUSTER_NAME, db2, IdealStateProperty.REBALANCER_CLASS_NAME.toString(), TestCustomizedIdealStateRebalancer.TestRebalancer.class.getName());
    _setupTool.addResourceProperty(CLUSTER_NAME, db2, IdealStateProperty.REBALANCE_MODE.toString(), RebalanceMode.USER_DEFINED.toString());
    _setupTool.rebalanceStorageCluster(CLUSTER_NAME, db2, 3);
    boolean result = ClusterStateVerifier.verifyByZkCallback(new ExternalViewBalancedVerifier(_gZkClient, CLUSTER_NAME, db2));
    Assert.assertTrue(result);
    Thread.sleep(1000);
    HelixDataAccessor accessor = new ZKHelixDataAccessor(CLUSTER_NAME, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    Builder keyBuilder = accessor.keyBuilder();
    ExternalView ev = accessor.getProperty(keyBuilder.externalView(db2));
    Assert.assertEquals(ev.getPartitionSet().size(), 60);
    for (String partition : ev.getPartitionSet()) {
        Assert.assertEquals(ev.getStateMap(partition).size(), 1);
    }
    IdealState is = accessor.getProperty(keyBuilder.idealStates(db2));
    for (String partition : is.getPartitionSet()) {
        Assert.assertEquals(is.getPreferenceList(partition).size(), 0);
        Assert.assertEquals(is.getInstanceStateMap(partition).size(), 0);
    }
    Assert.assertTrue(testRebalancerCreated);
    Assert.assertTrue(testRebalancerInvoked);
}

Example 47 with ZKHelixDataAccessor

use of org.apache.helix.manager.zk.ZKHelixDataAccessor in project helix by apache.

the class TestFullAutoNodeTagging method testUntag.

@Test
public void testUntag() throws Exception {
    final int NUM_PARTICIPANTS = 2;
    final int NUM_PARTITIONS = 4;
    final int NUM_REPLICAS = 1;
    final String RESOURCE_NAME = "TestResource0";
    final String TAG = "ASSIGNABLE";
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    final String clusterName = className + "_" + methodName;
    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
    // Set up cluster
    // participant port
    TestHelper.setupCluster(// participant port
    clusterName, // participant port
    ZK_ADDR, // participant port
    12918, // participant name prefix
    "localhost", // resource name prefix
    "TestResource", // resources
    1, // partitions per resource
    NUM_PARTITIONS, // number of nodes
    NUM_PARTICIPANTS, // replicas
    NUM_REPLICAS, // use FULL_AUTO mode to test node tagging
    "OnlineOffline", // use FULL_AUTO mode to test node tagging
    RebalanceMode.FULL_AUTO, // do rebalance
    true);
    // Tag the resource
    final HelixAdmin helixAdmin = new ZKHelixAdmin(_gZkClient);
    IdealState idealState = helixAdmin.getResourceIdealState(clusterName, RESOURCE_NAME);
    idealState.setInstanceGroupTag(TAG);
    helixAdmin.setResourceIdealState(clusterName, RESOURCE_NAME, idealState);
    // Get a data accessor
    final HelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    final PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    // Tag the participants
    for (int i = 0; i < NUM_PARTICIPANTS; i++) {
        final String instanceName = "localhost_" + (12918 + i);
        helixAdmin.addInstanceTag(clusterName, instanceName, TAG);
    }
    // Start controller
    ClusterControllerManager controller = new ClusterControllerManager(ZK_ADDR, clusterName, "controller");
    controller.syncStart();
    // Start participants
    MockParticipantManager[] participants = new MockParticipantManager[NUM_PARTICIPANTS];
    for (int i = 0; i < NUM_PARTICIPANTS; i++) {
        final String instanceName = "localhost_" + (12918 + i);
        participants[i] = new MockParticipantManager(ZK_ADDR, clusterName, instanceName);
        participants[i].syncStart();
    }
    // Verify that there are NUM_PARTITIONS partitions in the external view, each having
    // NUM_REPLICAS replicas, where all assigned replicas are to tagged nodes, and they are all
    // ONLINE.
    Verifier v = new Verifier() {

        @Override
        public boolean verify() throws Exception {
            ExternalView externalView = pollForProperty(ExternalView.class, accessor, keyBuilder.externalView(RESOURCE_NAME), true);
            if (externalView == null) {
                return false;
            }
            Set<String> taggedInstances = Sets.newHashSet(helixAdmin.getInstancesInClusterWithTag(clusterName, TAG));
            Set<String> partitionSet = externalView.getPartitionSet();
            if (partitionSet.size() != NUM_PARTITIONS) {
                return false;
            }
            for (String partitionName : partitionSet) {
                Map<String, String> stateMap = externalView.getStateMap(partitionName);
                if (stateMap.size() != NUM_REPLICAS) {
                    return false;
                }
                for (String participantName : stateMap.keySet()) {
                    if (!taggedInstances.contains(participantName)) {
                        return false;
                    }
                    String state = stateMap.get(participantName);
                    if (!state.equalsIgnoreCase("ONLINE")) {
                        return false;
                    }
                }
            }
            return true;
        }
    };
    // Run the verifier for both nodes tagged
    boolean initialResult = TestHelper.verify(v, 10 * 1000);
    Assert.assertTrue(initialResult);
    // Untag a node
    helixAdmin.removeInstanceTag(clusterName, "localhost_12918", TAG);
    // Verify again
    boolean finalResult = TestHelper.verify(v, 10 * 1000);
    Assert.assertTrue(finalResult);
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}

Example 48 with ZKHelixDataAccessor

use of org.apache.helix.manager.zk.ZKHelixDataAccessor in project helix by apache.

the class TestMixedModeAutoRebalance method beforeClass.

@BeforeClass
public void beforeClass() throws Exception {
    System.out.println("START " + CLASS_NAME + " at " + new Date(System.currentTimeMillis()));
    String namespace = "/" + CLUSTER_NAME;
    if (_gZkClient.exists(namespace)) {
        _gZkClient.deleteRecursively(namespace);
    }
    _gSetupTool.addCluster(CLUSTER_NAME, true);
    for (int i = 0; i < NUM_NODE; i++) {
        String storageNodeName = PARTICIPANT_PREFIX + "_" + (START_PORT + i);
        _gSetupTool.addInstanceToCluster(CLUSTER_NAME, storageNodeName);
        // start dummy participants
        MockParticipantManager participant = new MockParticipantManager(ZK_ADDR, CLUSTER_NAME, storageNodeName);
        participant.syncStart();
        _participants.add(participant);
    }
    // start controller
    String controllerName = CONTROLLER_PREFIX + "_0";
    _controller = new ClusterControllerManager(ZK_ADDR, CLUSTER_NAME, controllerName);
    _controller.syncStart();
    _clusterVerifier = new BestPossibleExternalViewVerifier.Builder(CLUSTER_NAME).setZkAddr(ZK_ADDR).build();
    enablePersistBestPossibleAssignment(_gZkClient, CLUSTER_NAME, true);
    _configAccessor = new ConfigAccessor(_gZkClient);
    _dataAccessor = new ZKHelixDataAccessor(CLUSTER_NAME, _baseAccessor);
}

Example 49 with ZKHelixDataAccessor

use of org.apache.helix.manager.zk.ZKHelixDataAccessor in project helix by apache.

the class TestConsecutiveZkSessionExpiry method testDistributedController.

@Test
public void testDistributedController() throws Exception {
    // Logger.getRootLogger().setLevel(Level.INFO);
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    int n = 2;
    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
    // participant port
    TestHelper.setupCluster(// participant port
    clusterName, // participant port
    ZK_ADDR, // participant port
    12918, // participant name prefix
    "localhost", // resource name prefix
    "TestDB", // resources
    1, // partitions per resource
    4, // number of nodes
    n, // replicas
    2, "MasterSlave", // do rebalance
    true);
    ClusterDistributedController[] distributedControllers = new ClusterDistributedController[n];
    CountDownLatch startCountdown = new CountDownLatch(1);
    CountDownLatch endCountdown = new CountDownLatch(1);
    for (int i = 0; i < n; i++) {
        String contrllerName = "localhost_" + (12918 + i);
        distributedControllers[i] = new ClusterDistributedController(ZK_ADDR, clusterName, contrllerName);
        distributedControllers[i].getStateMachineEngine().registerStateModelFactory("MasterSlave", new MockMSModelFactory());
        if (i == 0) {
            distributedControllers[i].addPreConnectCallback(new PreConnectTestCallback(contrllerName, startCountdown, endCountdown));
        }
        distributedControllers[i].connect();
    }
    boolean result = ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // expire the session of distributedController
    LOG.info("1st Expiring distributedController session...");
    String oldSessionId = distributedControllers[0].getSessionId();
    ZkTestHelper.asyncExpireSession(distributedControllers[0].getZkClient());
    String newSessionId = distributedControllers[0].getSessionId();
    LOG.info("Expried distributedController session. oldSessionId: " + oldSessionId + ", newSessionId: " + newSessionId);
    // expire zk session again during HelixManager#handleNewSession()
    startCountdown.await();
    LOG.info("2nd Expiring distributedController session...");
    oldSessionId = distributedControllers[0].getSessionId();
    ZkTestHelper.asyncExpireSession(distributedControllers[0].getZkClient());
    newSessionId = distributedControllers[0].getSessionId();
    LOG.info("Expried distributedController session. oldSessionId: " + oldSessionId + ", newSessionId: " + newSessionId);
    endCountdown.countDown();
    result = ClusterStateVerifier.verifyByPolling(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // verify leader changes to localhost_12919
    HelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    Assert.assertNotNull(pollForProperty(LiveInstance.class, accessor, keyBuilder.liveInstance("localhost_12918"), true));
    LiveInstance leader = pollForProperty(LiveInstance.class, accessor, keyBuilder.controllerLeader(), true);
    Assert.assertNotNull(leader);
    Assert.assertEquals(leader.getId(), "localhost_12919");
    // check localhost_12918 has 2 handlers: message and data-accessor
    LOG.debug("handlers: " + TestHelper.printHandlers(distributedControllers[0]));
    List<CallbackHandler> handlers = distributedControllers[0].getHandlers();
    Assert.assertEquals(handlers.size(), 2, "Distributed controller should have 2 handler (message) after lose leadership, but was " + handlers.size());
    // clean up
    distributedControllers[0].disconnect();
    distributedControllers[1].disconnect();
    Assert.assertNull(pollForProperty(LiveInstance.class, accessor, keyBuilder.liveInstance("localhost_12918"), false));
    Assert.assertNull(pollForProperty(LiveInstance.class, accessor, keyBuilder.liveInstance("localhost_12919"), false));
    Assert.assertNull(pollForProperty(LiveInstance.class, accessor, keyBuilder.controllerLeader(), false));
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}

Example 50 with ZKHelixDataAccessor

use of org.apache.helix.manager.zk.ZKHelixDataAccessor in project helix by apache.

the class TestDistributedControllerManager method simpleSessionExpiryTest.

@Test
public void simpleSessionExpiryTest() throws Exception {
    // Logger.getRootLogger().setLevel(Level.INFO);
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    int n = 2;
    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
    // participant port
    TestHelper.setupCluster(// participant port
    clusterName, // participant port
    ZK_ADDR, // participant port
    12918, // participant name prefix
    "localhost", // resource name prefix
    "TestDB", // resources
    1, // partitions per resource
    4, // number of nodes
    n, // replicas
    2, "MasterSlave", // do rebalance
    true);
    ClusterDistributedController[] distributedControllers = new ClusterDistributedController[n];
    for (int i = 0; i < n; i++) {
        String contrllerName = "localhost_" + (12918 + i);
        distributedControllers[i] = new ClusterDistributedController(ZK_ADDR, clusterName, contrllerName);
        distributedControllers[i].getStateMachineEngine().registerStateModelFactory("MasterSlave", new MockMSModelFactory());
        distributedControllers[i].connect();
    }
    boolean result = ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // expire localhost_12918
    expireController(distributedControllers[0], distributedControllers[1]);
    // expire localhost_12919
    expireController(distributedControllers[1], distributedControllers[0]);
    // clean up
    ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    for (int i = 0; i < n; i++) {
        distributedControllers[i].disconnect();
        Assert.assertNull(accessor.getProperty(keyBuilder.liveInstance(distributedControllers[i].getInstanceName())));
    }
    Assert.assertNull(accessor.getProperty(keyBuilder.controllerLeader()));
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}