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

Example 11 with ZKHelixDataAccessor

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

the class ServerContext method getDataAccssor.

public HelixDataAccessor getDataAccssor(String clusterName) {
    synchronized (_helixDataAccessorPool) {
        if (!_helixDataAccessorPool.containsKey(clusterName)) {
            ZkBaseDataAccessor<ZNRecord> baseDataAccessor = new ZkBaseDataAccessor<>(getZkClient());
            _helixDataAccessorPool.put(clusterName, new ZKHelixDataAccessor(clusterName, InstanceType.ADMINISTRATOR, baseDataAccessor));
        }
        return _helixDataAccessorPool.get(clusterName);
    }
}

Example 12 with ZKHelixDataAccessor

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

the class HelixCustomCodeRunner method start.

/**
 * This method will be invoked when there is a change in any subscribed
 * notificationTypes
 * @throws Exception
 */
public void start() throws Exception {
    if (_callback == null || _notificationTypes == null || _notificationTypes.size() == 0 || _resourceName == null) {
        throw new IllegalArgumentException("Require callback | notificationTypes | resourceName");
    }
    LOG.info("Register participantLeader on " + _notificationTypes + " using " + _resourceName);
    _stateModelFty = new GenericLeaderStandbyStateModelFactory(_callback, _notificationTypes);
    StateMachineEngine stateMach = _manager.getStateMachineEngine();
    stateMach.registerStateModelFactory(LEADER_STANDBY, _stateModelFty, _resourceName);
    ZkClient zkClient = null;
    try {
        // manually add ideal state for participant leader using LeaderStandby
        // model
        zkClient = new ZkClient(_zkAddr, ZkClient.DEFAULT_SESSION_TIMEOUT, ZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
        HelixDataAccessor accessor = new ZKHelixDataAccessor(_manager.getClusterName(), new ZkBaseDataAccessor<ZNRecord>(zkClient));
        Builder keyBuilder = accessor.keyBuilder();
        IdealState idealState = new IdealState(_resourceName);
        idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
        idealState.setReplicas(IdealState.IdealStateConstants.ANY_LIVEINSTANCE.toString());
        idealState.setNumPartitions(1);
        idealState.setStateModelDefRef(LEADER_STANDBY);
        idealState.setStateModelFactoryName(_resourceName);
        List<String> prefList = new ArrayList<String>(Arrays.asList(IdealState.IdealStateConstants.ANY_LIVEINSTANCE.toString()));
        idealState.getRecord().setListField(_resourceName + "_0", prefList);
        List<String> idealStates = accessor.getChildNames(keyBuilder.idealStates());
        while (idealStates == null || !idealStates.contains(_resourceName)) {
            accessor.setProperty(keyBuilder.idealStates(_resourceName), idealState);
            idealStates = accessor.getChildNames(keyBuilder.idealStates());
        }
        LOG.info("Set idealState for participantLeader:" + _resourceName + ", idealState:" + idealState);
    } finally {
        if (zkClient != null && zkClient.getConnection() != null) {
            zkClient.close();
        }
    }
}

Example 13 with ZKHelixDataAccessor

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

the class TestZNRecordSizeLimit method testZNRecordSizeLimitUseZNRecordStreamingSerializer.

@Test
public void testZNRecordSizeLimitUseZNRecordStreamingSerializer() {
    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordStreamingSerializer at " + new Date(System.currentTimeMillis()));
    ZNRecordStreamingSerializer serializer = new ZNRecordStreamingSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++) {
        buf[i] = 'a';
    }
    String bufStr = new String(buf);
    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++) {
        smallRecord.setSimpleField(i + "", bufStr);
    }
    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);
    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);
    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++) {
        largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try {
        zkClient.writeData(path2, largeRecord);
    } catch (HelixException e) {
        Assert.fail("Should not fail because data size is larger than 1M since compression applied");
    }
    record = zkClient.readData(path2);
    Assert.assertNotNull(record);
    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try {
        zkClient.writeData(path1, largeRecord);
    } catch (HelixException e) {
        Assert.fail("Should not fail because data size is larger than 1M since compression applied");
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertFalse(Arrays.equals(arr, arrNew));
    // test ZkDataAccessor
    ZKHelixAdmin admin = new ZKHelixAdmin(zkClient);
    admin.addCluster(className, true);
    InstanceConfig instanceConfig = new InstanceConfig("localhost_12918");
    admin.addInstance(className, instanceConfig);
    // oversized data should not create any new data on zk
    ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(className, new ZkBaseDataAccessor(zkClient));
    Builder keyBuilder = accessor.keyBuilder();
    // ZNRecord statusUpdates = new ZNRecord("statusUpdates");
    IdealState idealState = new IdealState("currentState");
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 0; i < 1024; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    boolean succeed = accessor.setProperty(keyBuilder.idealStates("TestDB_1"), idealState);
    Assert.assertTrue(succeed);
    HelixProperty property = accessor.getProperty(keyBuilder.idealStates("TestDB_1"));
    Assert.assertNotNull(property);
    // legal sized data gets written to zk
    idealState.getRecord().getSimpleFields().clear();
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 0; i < 900; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    succeed = accessor.setProperty(keyBuilder.idealStates("TestDB_2"), idealState);
    Assert.assertTrue(succeed);
    record = accessor.getProperty(keyBuilder.idealStates("TestDB_2")).getRecord();
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);
    // oversized data should not update existing data on zk
    idealState.getRecord().getSimpleFields().clear();
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 900; i < 1024; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    // System.out.println("record: " + idealState.getRecord());
    succeed = accessor.updateProperty(keyBuilder.idealStates("TestDB_2"), idealState);
    Assert.assertTrue(succeed);
    recordNew = accessor.getProperty(keyBuilder.idealStates("TestDB_2")).getRecord();
    arr = serializer.serialize(record);
    arrNew = serializer.serialize(recordNew);
    Assert.assertFalse(Arrays.equals(arr, arrNew));
    System.out.println("END testZNRecordSizeLimitUseZNRecordStreamingSerializer at " + new Date(System.currentTimeMillis()));
}

Example 14 with ZKHelixDataAccessor

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

the class TestZNRecordSizeLimit method testZNRecordSizeLimitUseZNRecordSerializer.

@Test
public void testZNRecordSizeLimitUseZNRecordSerializer() {
    String className = getShortClassName();
    System.out.println("START testZNRecordSizeLimitUseZNRecordSerializer at " + new Date(System.currentTimeMillis()));
    ZNRecordSerializer serializer = new ZNRecordSerializer();
    ZkClient zkClient = new ZkClient(ZK_ADDR);
    zkClient.setZkSerializer(serializer);
    String root = className;
    byte[] buf = new byte[1024];
    for (int i = 0; i < 1024; i++) {
        buf[i] = 'a';
    }
    String bufStr = new String(buf);
    // test zkClient
    // legal-sized data gets written to zk
    // write a znode of size less than 1m
    final ZNRecord smallRecord = new ZNRecord("normalsize");
    smallRecord.getSimpleFields().clear();
    for (int i = 0; i < 900; i++) {
        smallRecord.setSimpleField(i + "", bufStr);
    }
    String path1 = "/" + root + "/test1";
    zkClient.createPersistent(path1, true);
    zkClient.writeData(path1, smallRecord);
    ZNRecord record = zkClient.readData(path1);
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);
    // oversized data doesn't create any data on zk
    // prepare a znode of size larger than 1m
    final ZNRecord largeRecord = new ZNRecord("oversize");
    largeRecord.getSimpleFields().clear();
    for (int i = 0; i < 1024; i++) {
        largeRecord.setSimpleField(i + "", bufStr);
    }
    String path2 = "/" + root + "/test2";
    zkClient.createPersistent(path2, true);
    try {
        zkClient.writeData(path2, largeRecord);
    } catch (HelixException e) {
        Assert.fail("Should not fail because data size is larger than 1M since compression applied");
    }
    record = zkClient.readData(path2);
    Assert.assertNotNull(record);
    // oversized write doesn't overwrite existing data on zk
    record = zkClient.readData(path1);
    try {
        zkClient.writeData(path1, largeRecord);
    } catch (HelixException e) {
        Assert.fail("Should not fail because data size is larger than 1M since compression applied");
    }
    ZNRecord recordNew = zkClient.readData(path1);
    byte[] arr = serializer.serialize(record);
    byte[] arrNew = serializer.serialize(recordNew);
    Assert.assertFalse(Arrays.equals(arr, arrNew));
    // test ZkDataAccessor
    ZKHelixAdmin admin = new ZKHelixAdmin(zkClient);
    admin.addCluster(className, true);
    InstanceConfig instanceConfig = new InstanceConfig("localhost_12918");
    admin.addInstance(className, instanceConfig);
    // oversized data should not create any new data on zk
    ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(className, new ZkBaseDataAccessor(zkClient));
    Builder keyBuilder = accessor.keyBuilder();
    IdealState idealState = new IdealState("currentState");
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 0; i < 1024; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    boolean succeed = accessor.setProperty(keyBuilder.idealStates("TestDB0"), idealState);
    Assert.assertTrue(succeed);
    HelixProperty property = accessor.getProperty(keyBuilder.stateTransitionStatus("localhost_12918", "session_1", "partition_1"));
    Assert.assertNull(property);
    // legal sized data gets written to zk
    idealState.getRecord().getSimpleFields().clear();
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 0; i < 900; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    succeed = accessor.setProperty(keyBuilder.idealStates("TestDB1"), idealState);
    Assert.assertTrue(succeed);
    record = accessor.getProperty(keyBuilder.idealStates("TestDB1")).getRecord();
    Assert.assertTrue(serializer.serialize(record).length > 900 * 1024);
    // oversized data should not update existing data on zk
    idealState.getRecord().getSimpleFields().clear();
    idealState.setStateModelDefRef("MasterSlave");
    idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
    idealState.setNumPartitions(10);
    for (int i = 900; i < 1024; i++) {
        idealState.getRecord().setSimpleField(i + "", bufStr);
    }
    // System.out.println("record: " + idealState.getRecord());
    succeed = accessor.updateProperty(keyBuilder.idealStates("TestDB1"), idealState);
    Assert.assertTrue(succeed);
    recordNew = accessor.getProperty(keyBuilder.idealStates("TestDB1")).getRecord();
    arr = serializer.serialize(record);
    arrNew = serializer.serialize(recordNew);
    Assert.assertFalse(Arrays.equals(arr, arrNew));
    System.out.println("END testZNRecordSizeLimitUseZNRecordSerializer at " + new Date(System.currentTimeMillis()));
}

Example 15 with ZKHelixDataAccessor

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

the class TestZKPathDataDumpTask method testCapacityReached.

@Test
public void testCapacityReached() throws Exception {
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    int n = 1;
    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
    2, // number of nodes
    n, // replicas
    1, "MasterSlave", // do rebalance
    true);
    HelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    BaseDataAccessor<ZNRecord> baseAccessor = accessor.getBaseDataAccessor();
    HelixManager manager = mock(HelixManager.class);
    when(manager.getHelixDataAccessor()).thenReturn(accessor);
    when(manager.getClusterName()).thenReturn(clusterName);
    // run dump task without statusUpdates and errors, should not remove any existing
    // statusUpdate/error paths
    ZKPathDataDumpTask task = new ZKPathDataDumpTask(manager, Long.MAX_VALUE, Long.MAX_VALUE, 1);
    task.run();
    PropertyKey controllerStatusUpdateKey = keyBuilder.controllerTaskStatuses();
    Assert.assertTrue(baseAccessor.exists(controllerStatusUpdateKey.getPath(), 0));
    PropertyKey controllerErrorKey = keyBuilder.controllerTaskErrors();
    Assert.assertTrue(baseAccessor.exists(controllerErrorKey.getPath(), 0));
    PropertyKey statusUpdateKey = keyBuilder.stateTransitionStatus("localhost_12918");
    Assert.assertTrue(baseAccessor.exists(statusUpdateKey.getPath(), 0));
    PropertyKey errorKey = keyBuilder.stateTransitionErrors("localhost_12918");
    Assert.assertTrue(baseAccessor.exists(errorKey.getPath(), 0));
    // add participant status updates and errors
    statusUpdateKey = keyBuilder.stateTransitionStatus("localhost_12918", "session_0", "TestDB0", "TestDB0_0");
    accessor.setProperty(statusUpdateKey, new StatusUpdate(new ZNRecord("statusUpdate")));
    errorKey = keyBuilder.stateTransitionError("localhost_12918", "session_0", "TestDB0", "TestDB0_0");
    accessor.setProperty(errorKey, new Error(new ZNRecord("error")));
    // add controller status updates and errors (one of each, should not trigger anything)
    controllerStatusUpdateKey = keyBuilder.controllerTaskStatus("session_0", "TestDB");
    accessor.setProperty(controllerStatusUpdateKey, new StatusUpdate(new ZNRecord("controllerStatusUpdate")));
    controllerErrorKey = keyBuilder.controllerTaskError("TestDB_error");
    accessor.setProperty(controllerErrorKey, new Error(new ZNRecord("controllerError")));
    // run dump task, should not remove anything because the threshold is not exceeded
    task.run();
    Assert.assertTrue(baseAccessor.exists(controllerStatusUpdateKey.getPath(), 0));
    Assert.assertTrue(baseAccessor.exists(controllerErrorKey.getPath(), 0));
    Assert.assertTrue(baseAccessor.exists(statusUpdateKey.getPath(), 0));
    Assert.assertTrue(baseAccessor.exists(errorKey.getPath(), 0));
    // add a second set of all status updates and errors
    statusUpdateKey = keyBuilder.stateTransitionStatus("localhost_12918", "session_0", "TestDB0", "TestDB0_1");
    accessor.setProperty(statusUpdateKey, new StatusUpdate(new ZNRecord("statusUpdate")));
    errorKey = keyBuilder.stateTransitionError("localhost_12918", "session_0", "TestDB0", "TestDB0_1");
    accessor.setProperty(errorKey, new Error(new ZNRecord("error")));
    controllerStatusUpdateKey = keyBuilder.controllerTaskStatus("session_0", "TestDB1");
    accessor.setProperty(controllerStatusUpdateKey, new StatusUpdate(new ZNRecord("controllerStatusUpdate")));
    controllerErrorKey = keyBuilder.controllerTaskError("TestDB1_error");
    accessor.setProperty(controllerErrorKey, new Error(new ZNRecord("controllerError")));
    // run dump task, should remove everything since capacities are exceeded
    task.run();
    Assert.assertFalse(baseAccessor.exists(controllerStatusUpdateKey.getPath(), 0));
    Assert.assertFalse(baseAccessor.exists(controllerErrorKey.getPath(), 0));
    Assert.assertFalse(baseAccessor.exists(statusUpdateKey.getPath(), 0));
    Assert.assertFalse(baseAccessor.exists(errorKey.getPath(), 0));
}