Examples with HelixManager org.apache.helix.HelixManager used on opensource projects

Example 66 with HelixManager

use of org.apache.helix.HelixManager in project helix by apache.

the class TestSchedulerMessage method testSchedulerMsg.

@Test(dependsOnMethods = "testSchedulerZeroMsg")
public void testSchedulerMsg() throws Exception {
    _factory._results.clear();
    HelixManager manager = null;
    for (int i = 0; i < NODE_NR; i++) {
        _participants[i].getMessagingService().registerMessageHandlerFactory(_factory.getMessageTypes(), _factory);
        // _startCMResultMap.get(hostDest)._manager;
        manager = _participants[i];
    }
    Message schedulerMessage = new Message(MessageType.SCHEDULER_MSG + "", UUID.randomUUID().toString());
    schedulerMessage.setTgtSessionId("*");
    schedulerMessage.setTgtName("CONTROLLER");
    // TODO: change it to "ADMIN" ?
    schedulerMessage.setSrcName("CONTROLLER");
    // schedulerMessage.getRecord().setSimpleField(DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE,
    // "TestSchedulerMsg");
    // Template for the individual message sent to each participant
    Message msg = new Message(_factory.getMessageTypes().get(0), "Template");
    msg.setTgtSessionId("*");
    msg.setMsgState(MessageState.NEW);
    // Criteria to send individual messages
    Criteria cr = new Criteria();
    cr.setInstanceName("localhost_%");
    cr.setRecipientInstanceType(InstanceType.PARTICIPANT);
    cr.setSessionSpecific(false);
    cr.setResource("%");
    cr.setPartition("%");
    ObjectMapper mapper = new ObjectMapper();
    SerializationConfig serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    StringWriter sw = new StringWriter();
    mapper.writeValue(sw, cr);
    String crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    schedulerMessage.getRecord().setMapField("MessageTemplate", msg.getRecord().getSimpleFields());
    schedulerMessage.getRecord().setSimpleField("TIMEOUT", "-1");
    HelixDataAccessor helixDataAccessor = manager.getHelixDataAccessor();
    Builder keyBuilder = helixDataAccessor.keyBuilder();
    helixDataAccessor.createControllerMessage(schedulerMessage);
    for (int i = 0; i < 30; i++) {
        Thread.sleep(2000);
        if (_PARTITIONS == _factory._results.size()) {
            break;
        }
    }
    Assert.assertEquals(_PARTITIONS, _factory._results.size());
    PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), schedulerMessage.getMsgId());
    int messageResultCount = 0;
    for (int i = 0; i < 10; i++) {
        Thread.sleep(1000);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        Assert.assertTrue(statusUpdate.getMapField("SentMessageCount").get("MessageCount").equals("" + (_PARTITIONS * 3)));
        for (String key : statusUpdate.getMapFields().keySet()) {
            if (key.startsWith("MessageResult ")) {
                messageResultCount++;
                Assert.assertTrue(statusUpdate.getMapField(key).size() > 1);
            }
        }
        if (messageResultCount == _PARTITIONS * 3) {
            break;
        } else {
            Thread.sleep(2000);
        }
    }
    Assert.assertEquals(messageResultCount, _PARTITIONS * 3);
    int count = 0;
    for (Set<String> val : _factory._results.values()) {
        count += val.size();
    }
    Assert.assertEquals(count, _PARTITIONS * 3);
    // test the ZkPathDataDumpTask
    String controllerStatusPath = PropertyPathBuilder.controllerStatusUpdate(manager.getClusterName());
    List<String> subPaths = _gZkClient.getChildren(controllerStatusPath);
    Assert.assertTrue(subPaths.size() > 0);
    for (String subPath : subPaths) {
        String nextPath = controllerStatusPath + "/" + subPath;
        List<String> subsubPaths = _gZkClient.getChildren(nextPath);
        Assert.assertTrue(subsubPaths.size() > 0);
    }
    String instanceStatusPath = PropertyPathBuilder.instanceStatusUpdate(manager.getClusterName(), "localhost_" + (START_PORT));
    subPaths = _gZkClient.getChildren(instanceStatusPath);
    Assert.assertTrue(subPaths.size() == 0);
    for (String subPath : subPaths) {
        String nextPath = instanceStatusPath + "/" + subPath;
        List<String> subsubPaths = _gZkClient.getChildren(nextPath);
        Assert.assertTrue(subsubPaths.size() > 0);
        for (String subsubPath : subsubPaths) {
            String nextnextPath = nextPath + "/" + subsubPath;
            Assert.assertTrue(_gZkClient.getChildren(nextnextPath).size() > 0);
        }
    }
    Thread.sleep(3000);
    ZKPathDataDumpTask dumpTask = new ZKPathDataDumpTask(manager, 0L, 0L, Integer.MAX_VALUE);
    dumpTask.run();
    subPaths = _gZkClient.getChildren(controllerStatusPath);
    Assert.assertTrue(subPaths.size() > 0);
    for (String subPath : subPaths) {
        String nextPath = controllerStatusPath + "/" + subPath;
        List<String> subsubPaths = _gZkClient.getChildren(nextPath);
        Assert.assertTrue(subsubPaths.size() == 0);
    }
    subPaths = _gZkClient.getChildren(instanceStatusPath);
    Assert.assertTrue(subPaths.size() == 0);
    for (String subPath : subPaths) {
        String nextPath = instanceStatusPath + "/" + subPath;
        List<String> subsubPaths = _gZkClient.getChildren(nextPath);
        Assert.assertTrue(subsubPaths.size() > 0);
        for (String subsubPath : subsubPaths) {
            String nextnextPath = nextPath + "/" + subsubPath;
            Assert.assertTrue(_gZkClient.getChildren(nextnextPath).size() == 0);
        }
    }
}

Example 67 with HelixManager

use of org.apache.helix.HelixManager in project helix by apache.

the class TestSchedulerMessage method testSchedulerMsg3.

@Test(dependsOnMethods = "testSchedulerMsg")
public void testSchedulerMsg3() throws Exception {
    _factory._results.clear();
    Thread.sleep(2000);
    HelixManager manager = null;
    for (int i = 0; i < NODE_NR; i++) {
        _participants[i].getMessagingService().registerMessageHandlerFactory(_factory.getMessageTypes(), _factory);
        _participants[i].getMessagingService().registerMessageHandlerFactory(_factory.getMessageTypes(), _factory);
        // _startCMResultMap.get(hostDest)._manager;
        manager = _participants[i];
    }
    Message schedulerMessage = new Message(MessageType.SCHEDULER_MSG + "", UUID.randomUUID().toString());
    schedulerMessage.setTgtSessionId("*");
    schedulerMessage.setTgtName("CONTROLLER");
    // TODO: change it to "ADMIN" ?
    schedulerMessage.setSrcName("CONTROLLER");
    // Template for the individual message sent to each participant
    Message msg = new Message(_factory.getMessageTypes().get(0), "Template");
    msg.setTgtSessionId("*");
    msg.setMsgState(MessageState.NEW);
    // Criteria to send individual messages
    Criteria cr = new Criteria();
    cr.setInstanceName("localhost_%");
    cr.setRecipientInstanceType(InstanceType.PARTICIPANT);
    cr.setSessionSpecific(false);
    cr.setResource("%");
    cr.setPartition("%");
    ObjectMapper mapper = new ObjectMapper();
    SerializationConfig serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    StringWriter sw = new StringWriter();
    mapper.writeValue(sw, cr);
    String crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    schedulerMessage.getRecord().setMapField("MessageTemplate", msg.getRecord().getSimpleFields());
    schedulerMessage.getRecord().setSimpleField("TIMEOUT", "-1");
    schedulerMessage.getRecord().setSimpleField("WAIT_ALL", "true");
    schedulerMessage.getRecord().setSimpleField(DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE, "TestSchedulerMsg3");
    Criteria cr2 = new Criteria();
    cr2.setRecipientInstanceType(InstanceType.CONTROLLER);
    cr2.setInstanceName("*");
    cr2.setSessionSpecific(false);
    MockAsyncCallback callback = new MockAsyncCallback();
    cr.setInstanceName("localhost_%");
    mapper = new ObjectMapper();
    serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    sw = new StringWriter();
    mapper.writeValue(sw, cr);
    crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    for (int i = 0; i < 4; i++) {
        callback = new MockAsyncCallback();
        cr.setInstanceName("localhost_" + (START_PORT + i));
        mapper = new ObjectMapper();
        serializationConfig = mapper.getSerializationConfig();
        serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
        sw = new StringWriter();
        mapper.writeValue(sw, cr);
        schedulerMessage.setMsgId(UUID.randomUUID().toString());
        crString = sw.toString();
        schedulerMessage.getRecord().setSimpleField("Criteria", crString);
        manager.getMessagingService().sendAndWait(cr2, schedulerMessage, callback, -1);
        String msgId = callback._message.getResultMap().get(DefaultSchedulerMessageHandlerFactory.SCHEDULER_MSG_ID);
        HelixDataAccessor helixDataAccessor = manager.getHelixDataAccessor();
        Builder keyBuilder = helixDataAccessor.keyBuilder();
        for (int j = 0; j < 100; j++) {
            Thread.sleep(200);
            PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
            ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
            if (statusUpdate.getMapFields().containsKey("Summary")) {
                break;
            }
        }
        Thread.sleep(3000);
        PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        Assert.assertTrue(statusUpdate.getMapField("SentMessageCount").get("MessageCount").equals("" + (_PARTITIONS * 3 / 5)));
        int messageResultCount = 0;
        for (String key : statusUpdate.getMapFields().keySet()) {
            if (key.startsWith("MessageResult")) {
                messageResultCount++;
            }
        }
        Assert.assertEquals(messageResultCount, _PARTITIONS * 3 / 5);
        int count = 0;
        // System.out.println(i);
        for (Set<String> val : _factory._results.values()) {
            // System.out.println(val);
            count += val.size();
        }
        // System.out.println(count);
        Assert.assertEquals(count, _PARTITIONS * 3 / 5 * (i + 1));
    }
}

Example 68 with HelixManager

use of org.apache.helix.HelixManager in project helix by apache.

the class TestSchedulerMessage method testSchedulerMsg4.

@Test(dependsOnMethods = "testSchedulerMsg3")
public void testSchedulerMsg4() throws Exception {
    _factory._results.clear();
    HelixManager manager = null;
    for (int i = 0; i < NODE_NR; i++) {
        _participants[i].getMessagingService().registerMessageHandlerFactory(_factory.getMessageTypes(), _factory);
        _participants[i].getMessagingService().registerMessageHandlerFactory(_factory.getMessageTypes(), _factory);
        // _startCMResultMap.get(hostDest)._manager;
        manager = _participants[i];
    }
    Message schedulerMessage = new Message(MessageType.SCHEDULER_MSG + "", UUID.randomUUID().toString());
    schedulerMessage.setTgtSessionId("*");
    schedulerMessage.setTgtName("CONTROLLER");
    // TODO: change it to "ADMIN" ?
    schedulerMessage.setSrcName("CONTROLLER");
    // Template for the individual message sent to each participant
    Message msg = new Message(_factory.getMessageTypes().get(0), "Template");
    msg.setTgtSessionId("*");
    msg.setMsgState(MessageState.NEW);
    // Criteria to send individual messages
    Criteria cr = new Criteria();
    cr.setInstanceName("localhost_%");
    cr.setRecipientInstanceType(InstanceType.PARTICIPANT);
    cr.setSessionSpecific(false);
    cr.setResource("TestDB");
    cr.setPartition("%");
    ObjectMapper mapper = new ObjectMapper();
    SerializationConfig serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    StringWriter sw = new StringWriter();
    mapper.writeValue(sw, cr);
    String crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    schedulerMessage.getRecord().setMapField("MessageTemplate", msg.getRecord().getSimpleFields());
    schedulerMessage.getRecord().setSimpleField("TIMEOUT", "-1");
    schedulerMessage.getRecord().setSimpleField("WAIT_ALL", "true");
    schedulerMessage.getRecord().setSimpleField(DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE, "TestSchedulerMsg4");
    Criteria cr2 = new Criteria();
    cr2.setRecipientInstanceType(InstanceType.CONTROLLER);
    cr2.setInstanceName("*");
    cr2.setSessionSpecific(false);
    Map<String, String> constraints = new TreeMap<String, String>();
    constraints.put("MESSAGE_TYPE", "STATE_TRANSITION");
    constraints.put("TRANSITION", "OFFLINE-COMPLETED");
    constraints.put("CONSTRAINT_VALUE", "1");
    constraints.put("INSTANCE", ".*");
    manager.getClusterManagmentTool().setConstraint(manager.getClusterName(), ConstraintType.MESSAGE_CONSTRAINT, "constraint1", new ConstraintItem(constraints));
    MockAsyncCallback callback = new MockAsyncCallback();
    cr.setInstanceName("localhost_%");
    mapper = new ObjectMapper();
    serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    sw = new StringWriter();
    mapper.writeValue(sw, cr);
    crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    manager.getMessagingService().sendAndWait(cr2, schedulerMessage, callback, -1);
    String msgIdPrime = callback._message.getResultMap().get(DefaultSchedulerMessageHandlerFactory.SCHEDULER_MSG_ID);
    HelixDataAccessor helixDataAccessor = manager.getHelixDataAccessor();
    Builder keyBuilder = helixDataAccessor.keyBuilder();
    ArrayList<String> msgIds = new ArrayList<String>();
    for (int i = 0; i < NODE_NR; i++) {
        callback = new MockAsyncCallback();
        cr.setInstanceName("localhost_" + (START_PORT + i));
        mapper = new ObjectMapper();
        serializationConfig = mapper.getSerializationConfig();
        serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
        sw = new StringWriter();
        mapper.writeValue(sw, cr);
        schedulerMessage.setMsgId(UUID.randomUUID().toString());
        crString = sw.toString();
        schedulerMessage.getRecord().setSimpleField("Criteria", crString);
        manager.getMessagingService().sendAndWait(cr2, schedulerMessage, callback, -1);
        String msgId = callback._message.getResultMap().get(DefaultSchedulerMessageHandlerFactory.SCHEDULER_MSG_ID);
        msgIds.add(msgId);
    }
    for (int i = 0; i < NODE_NR; i++) {
        String msgId = msgIds.get(i);
        for (int j = 0; j < 100; j++) {
            Thread.sleep(200);
            PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
            ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
            if (statusUpdate.getMapFields().containsKey("Summary")) {
                // System.err.println(msgId+" done");
                break;
            }
        }
        PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        Assert.assertTrue(statusUpdate.getMapField("SentMessageCount").get("MessageCount").equals("" + (_PARTITIONS * 3 / 5)));
        int messageResultCount = 0;
        for (String key : statusUpdate.getMapFields().keySet()) {
            if (key.startsWith("MessageResult")) {
                messageResultCount++;
            }
        }
        if (messageResultCount != _PARTITIONS * 3 / 5) {
            int x = 10;
            x = x + messageResultCount;
        }
        Assert.assertEquals(messageResultCount, _PARTITIONS * 3 / 5);
    }
    for (int j = 0; j < 100; j++) {
        Thread.sleep(200);
        PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgIdPrime);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        if (statusUpdate.getMapFields().containsKey("Summary")) {
            break;
        }
    }
    int count = 0;
    for (Set<String> val : _factory._results.values()) {
        // System.out.println(val);
        count += val.size();
    }
    // System.out.println(count);
    Assert.assertEquals(count, _PARTITIONS * 3 * 2);
}

Example 69 with HelixManager

use of org.apache.helix.HelixManager in project helix by apache.

the class TestSchedulerMsgContraints method testSchedulerMsgContraints.

@Test
public void testSchedulerMsgContraints() throws Exception {
    TestSchedulerMessage.TestMessagingHandlerFactoryLatch factory = new TestSchedulerMessage.TestMessagingHandlerFactoryLatch();
    HelixManager manager = null;
    for (int i = 0; i < NODE_NR; i++) {
        _participants[i].getMessagingService().registerMessageHandlerFactory(factory.getMessageType(), factory);
        _participants[i].getMessagingService().registerMessageHandlerFactory(factory.getMessageType(), factory);
        // _startCMResultMap.get(hostDest)._manager;
        manager = _participants[i];
    }
    Message schedulerMessage = new Message(MessageType.SCHEDULER_MSG + "", UUID.randomUUID().toString());
    schedulerMessage.setTgtSessionId("*");
    schedulerMessage.setTgtName("CONTROLLER");
    // TODO: change it to "ADMIN" ?
    schedulerMessage.setSrcName("CONTROLLER");
    // Template for the individual message sent to each participant
    Message msg = new Message(factory.getMessageType(), "Template");
    msg.setTgtSessionId("*");
    msg.setMsgState(MessageState.NEW);
    // Criteria to send individual messages
    Criteria cr = new Criteria();
    cr.setInstanceName("localhost_%");
    cr.setRecipientInstanceType(InstanceType.PARTICIPANT);
    cr.setSessionSpecific(false);
    cr.setResource("%");
    cr.setPartition("%");
    ObjectMapper mapper = new ObjectMapper();
    SerializationConfig serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    StringWriter sw = new StringWriter();
    mapper.writeValue(sw, cr);
    String crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    schedulerMessage.getRecord().setMapField("MessageTemplate", msg.getRecord().getSimpleFields());
    schedulerMessage.getRecord().setSimpleField("TIMEOUT", "-1");
    schedulerMessage.getRecord().setSimpleField("WAIT_ALL", "true");
    schedulerMessage.getRecord().setSimpleField(DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE, "TestSchedulerMsgContraints");
    Criteria cr2 = new Criteria();
    cr2.setRecipientInstanceType(InstanceType.CONTROLLER);
    cr2.setInstanceName("*");
    cr2.setSessionSpecific(false);
    TestSchedulerMessage.MockAsyncCallback callback = new TestSchedulerMessage.MockAsyncCallback();
    mapper = new ObjectMapper();
    serializationConfig = mapper.getSerializationConfig();
    serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
    sw = new StringWriter();
    mapper.writeValue(sw, cr);
    HelixDataAccessor helixDataAccessor = manager.getHelixDataAccessor();
    PropertyKey.Builder keyBuilder = helixDataAccessor.keyBuilder();
    // Set constraints that only 1 message per participant
    Map<String, String> constraints = new TreeMap<String, String>();
    constraints.put("MESSAGE_TYPE", "STATE_TRANSITION");
    constraints.put("TRANSITION", "OFFLINE-COMPLETED");
    constraints.put("CONSTRAINT_VALUE", "1");
    constraints.put("INSTANCE", ".*");
    manager.getClusterManagmentTool().setConstraint(manager.getClusterName(), ConstraintType.MESSAGE_CONSTRAINT, "constraint1", new ConstraintItem(constraints));
    // Send scheduler message
    crString = sw.toString();
    schedulerMessage.getRecord().setSimpleField("Criteria", crString);
    manager.getMessagingService().sendAndWait(cr2, schedulerMessage, callback, -1);
    String msgId = callback._message.getResultMap().get(DefaultSchedulerMessageHandlerFactory.SCHEDULER_MSG_ID);
    for (int j = 0; j < 10; j++) {
        Thread.sleep(200);
        PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        if (statusUpdate.getMapFields().containsKey("SentMessageCount")) {
            Assert.assertEquals(statusUpdate.getMapFields().get("SentMessageCount").get("MessageCount"), "" + (_PARTITIONS * 3));
            break;
        }
    }
    for (int i = 0; i < _PARTITIONS * 3 / 5; i++) {
        for (int j = 0; j < 10; j++) {
            Thread.sleep(300);
            if (factory._messageCount == 5 * (i + 1))
                break;
        }
        Thread.sleep(300);
        Assert.assertEquals(factory._messageCount, 5 * (i + 1));
        factory.signal();
    // System.err.println(i);
    }
    for (int j = 0; j < 10; j++) {
        Thread.sleep(200);
        PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
        ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
        if (statusUpdate.getMapFields().containsKey("Summary")) {
            break;
        }
    }
    Assert.assertEquals(_PARTITIONS, factory._results.size());
    PropertyKey controllerTaskStatus = keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.name(), msgId);
    ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
    Assert.assertTrue(statusUpdate.getMapField("SentMessageCount").get("MessageCount").equals("" + (_PARTITIONS * 3)));
    int messageResultCount = 0;
    for (String key : statusUpdate.getMapFields().keySet()) {
        if (key.startsWith("MessageResult ")) {
            messageResultCount++;
        }
    }
    Assert.assertEquals(messageResultCount, _PARTITIONS * 3);
    int count = 0;
    for (Set<String> val : factory._results.values()) {
        count += val.size();
    }
    Assert.assertEquals(count, _PARTITIONS * 3);
    manager.getClusterManagmentTool().removeConstraint(manager.getClusterName(), ConstraintType.MESSAGE_CONSTRAINT, "constraint1");
}

Example 70 with HelixManager

use of org.apache.helix.HelixManager in project helix by apache.

the class TestParticipantManager method simpleIntegrationTest.

@Test
public void simpleIntegrationTest() throws Exception {
    // Logger.getRootLogger().setLevel(Level.INFO);
    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
    4, // number of nodes
    n, // replicas
    1, "MasterSlave", // do rebalance
    true);
    HelixManager participant = new ZKHelixManager(clusterName, "localhost_12918", InstanceType.PARTICIPANT, ZK_ADDR);
    participant.getStateMachineEngine().registerStateModelFactory("MasterSlave", new MockMSModelFactory());
    participant.connect();
    HelixManager controller = new ZKHelixManager(clusterName, "controller_0", InstanceType.CONTROLLER, ZK_ADDR);
    controller.connect();
    boolean result = ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // cleanup
    controller.disconnect();
    participant.disconnect();
    // verify all live-instances and leader nodes are gone
    ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    Assert.assertNull(accessor.getProperty(keyBuilder.liveInstance("localhost_12918")));
    Assert.assertNull(accessor.getProperty(keyBuilder.controllerLeader()));
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}