org.apache.helix.manager.zk.ZkClient类的使用及代码示例

x33g5p2x  于2022-02-05 转载在 其他  
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本文整理了Java中org.apache.helix.manager.zk.ZkClient类的一些代码示例，展示了ZkClient类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ZkClient类的具体详情如下：
包路径：org.apache.helix.manager.zk.ZkClient
类名称：ZkClient

ZkClient介绍

[英]Raw ZkClient that wraps org.apache.helix.manager.zk.zookeeper.ZkClient, with additional constructors and builder. Note that, instead of directly constructing a raw ZkClient, applications should always use HelixZkClientFactory to build shared or dedicated HelixZkClient instances. Only constructing a raw ZkClient when advanced usage is required. For example, application need to access/manage ZkConnection directly. Both SharedZKClient and DedicatedZkClient are built based on the raw ZkClient. As shown below. ---------------------------- | | --------------------- | | | | *implements SharedZkClient DedicatedZkClient ----> HelixZkClient Interface | | | --------------------- | | | Raw ZkClient (this class)-------- | Native ZkClient TODO Completely replace usage of the raw ZkClient within helix-core. Instead, using HelixZkClient. --JJ
[中]包装组织的原始客户机。阿帕奇。螺旋。经理zk。动物园管理员。ZkClient，以及其他构造函数和生成器。请注意，应用程序不应直接构建原始的ZkClient，而应始终使用HelixZkClientFactory来构建共享或专用的HelixZkClient实例。仅在需要高级使用时构建原始客户机。例如，应用程序需要直接访问/管理连接。SharedZKClient和专用ZkClient都是基于原始ZkClient构建的。如下图所示。-------------------------------------------------------------------------| | | | |*实现SharedZkClient专用ZkClient-->HelixZkClient接口| | | | | | | | Raw ZkClient（该类）--------------本机ZkClient以完全取代在helix core中使用Raw ZkClient。而是使用HelixZkClient--林俊杰

代码示例

代码示例来源：origin: apache/incubator-pinot

public void start(ControllerMetrics controllerMetrics) {
 _controllerMetrics = controllerMetrics;
 LOGGER.info("Starting realtime segments manager, adding a listener on the property store table configs path.");
 String zkUrl = _pinotHelixResourceManager.getHelixZkURL();
 _zkClient = new ZkClient(zkUrl, ZkClient.DEFAULT_SESSION_TIMEOUT, ZkClient.DEFAULT_CONNECTION_TIMEOUT);
 _zkClient.setZkSerializer(new ZNRecordSerializer());
 _zkClient.waitUntilConnected(CommonConstants.Helix.ZkClient.DEFAULT_CONNECT_TIMEOUT_SEC, TimeUnit.SECONDS);
 // Subscribe to any data/child changes to property
 _zkClient.subscribeChildChanges(_tableConfigPath, this);
 _zkClient.subscribeDataChanges(_tableConfigPath, this);
 // Subscribe to leadership changes
 ControllerLeadershipManager.getInstance().subscribe(PinotLLCRealtimeSegmentManager.class.getName(), this);
 // Setup change listeners for already existing tables, if any.
 processPropertyStoreChange(_tableConfigPath);
}

代码示例来源：origin: apache/incubator-pinot

StateModelDefinition newStateModelDef =
  PinotHelixSegmentOnlineOfflineStateModelGenerator.generatePinotStateModelDefinition();
ZkClient zkClient = new ZkClient(zkPath);
zkClient.waitUntilConnected(CommonConstants.Helix.ZkClient.DEFAULT_CONNECT_TIMEOUT_SEC, TimeUnit.SECONDS);
zkClient.setZkSerializer(new ZNRecordSerializer());
HelixDataAccessor accessor =
  new ZKHelixDataAccessor(helixClusterName, new ZkBaseDataAccessor<ZNRecord>(zkClient));
accessor.setProperty(keyBuilder.stateModelDef(segmentStateModelName), newStateModelDef);
LOGGER.info("Completed updating statemodel {}", segmentStateModelName);
zkClient.close();

代码示例来源：origin: apache/incubator-pinot

@Override
 public boolean execute()
   throws Exception {
  LOGGER.info("Connecting to Zookeeper at address: {}", _zkAddress);
  ZkClient zkClient = new ZkClient(_zkAddress, 5000);
  String helixClusterName = "/" + _clusterName;

  LOGGER.info("Executing command: " + toString());
  if (!zkClient.exists(helixClusterName)) {
   LOGGER.error("Cluster {} does not exist.", _clusterName);
   return false;
  }

  zkClient.deleteRecursive(helixClusterName);
  return true;
 }
}

代码示例来源：origin: apache/incubator-pinot

FakeHelixManager(String clusterName, String instanceName, InstanceType instanceType, String zkAddress) {
 super(clusterName, instanceName, instanceType, zkAddress);
 super._zkclient = new ZkClient(StringUtil.join("/", StringUtils.chomp(ZkStarter.DEFAULT_ZK_STR, "/")),
   ZkClient.DEFAULT_SESSION_TIMEOUT, ZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
 _zkclient.deleteRecursive("/" + clusterName + "/PROPERTYSTORE");
 _zkclient.createPersistent("/" + clusterName + "/PROPERTYSTORE", true);
 setPropertyStore(clusterName);
}

代码示例来源：origin: apache/helix

new ZkClient(zkAddr, ZkClient.DEFAULT_SESSION_TIMEOUT,
     ZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
 ZKHelixAdmin admin = new ZKHelixAdmin(zkclient);
} finally {
 if (zkclient != null) {
  zkclient.close();

代码示例来源：origin: apache/helix

new ZkClient(ZK_ADDR, HelixZkClient.DEFAULT_SESSION_TIMEOUT,
    HelixZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
client.createPersistent(path, true);
client.subscribeDataChanges(path, listener);
client.subscribeChildChanges(path, listener);
  "ZooKeeper#watchManager#childWatches should have 1 child watch on path: " + path);
client.unsubscribeDataChanges(path, listener);
client.unsubscribeChildChanges(path, listener);
Assert.assertTrue(childWatch.isEmpty(), "ZooKeeper#watchManager#childWatches should be empty");
client.close();

代码示例来源：origin: apache/helix

final long TEST_DATA_SIZE = zkClient.serialize(TEST_DATA, TEST_PATH).length;
if (_zkClient.exists(TEST_PATH)) {
 _zkClient.delete(TEST_PATH);
if (!_zkClient.exists(TEST_ROOT)) {
 _zkClient.createPersistent(TEST_ROOT, true);
Assert.assertEquals((long) beanServer.getAttribute(rootname, "ReadTotalLatencyCounter"), 0);
Assert.assertEquals((long) beanServer.getAttribute(rootname, "ReadLatencyGauge.Max"), 0);
zkClient.exists(TEST_ROOT);
Assert.assertEquals((long) beanServer.getAttribute(rootname, "ReadCounter"), 1);
Assert.assertTrue((long) beanServer.getAttribute(rootname, "ReadTotalLatencyCounter") >= 0);
  0);
Assert.assertEquals((long) beanServer.getAttribute(idealStatename, "WriteLatencyGauge.Max"), 0);
zkClient.create(TEST_PATH, TEST_DATA, CreateMode.PERSISTENT);
Assert.assertEquals((long) beanServer.getAttribute(rootname, "WriteCounter"), 1);
Assert.assertEquals((long) beanServer.getAttribute(rootname, "WriteBytesCounter"),
Assert.assertEquals(origIdealStatesReadTotalLatencyCounter, 0);
Assert.assertEquals((long) beanServer.getAttribute(idealStatename, "ReadLatencyGauge.Max"), 0);
zkClient.readData(TEST_PATH, new Stat());
Assert.assertEquals((long) beanServer.getAttribute(rootname, "ReadCounter"), 2);
Assert
  >= origIdealStatesReadTotalLatencyCounter);
Assert.assertTrue((long) beanServer.getAttribute(idealStatename, "ReadLatencyGauge.Max") >= 0);
zkClient.getChildren(TEST_PATH);

代码示例来源：origin: apache/incubator-pinot

void closeZkClient() {
  _zkclient.close();
 }
}

代码示例来源：origin: apache/incubator-pinot

List<String> tables = zkHelixAdmin.getResourcesInCluster(_clusterName);
ZkClient zkClient = new ZkClient(_zkAddress);
zkClient.setZkSerializer(new ZNRecordStreamingSerializer());
LOGGER.info("Connecting to Zookeeper at: {}", _zkAddress);
zkClient.waitUntilConnected(CommonConstants.Helix.ZkClient.DEFAULT_CONNECT_TIMEOUT_SEC, TimeUnit.SECONDS);
ZkBaseDataAccessor<ZNRecord> baseDataAccessor = new ZkBaseDataAccessor<>(zkClient);
ZKHelixDataAccessor zkHelixDataAccessor = new ZKHelixDataAccessor(_clusterName, baseDataAccessor);

代码示例来源：origin: org.apache.helix/helix-core

public ZKDumper(String zkAddress) {
 client = new ZkClient(zkAddress, ZkClient.DEFAULT_CONNECTION_TIMEOUT);
 ZkSerializer zkSerializer = new ByteArraySerializer();
 client.setZkSerializer(zkSerializer);
 filter = new FilenameFilter() {
  @Override
  public boolean accept(File dir, String name) {
   return !name.startsWith(".");
  }
 };
}

代码示例来源：origin: apache/incubator-pinot

@BeforeClass
public void setUp()
  throws Exception {
 _zookeeperInstance = ZkStarter.startLocalZkServer();
 _zkClient = new ZkClient(ZkStarter.DEFAULT_ZK_STR);
 final String instanceId = "localhost_helixController";
 _pinotHelixResourceManager =
   new PinotHelixResourceManager(ZkStarter.DEFAULT_ZK_STR, HELIX_CLUSTER_NAME, instanceId, null, 10000L, true,
     /*isUpdateStateModel=*/ false, true);
 _pinotHelixResourceManager.start();
 _helixAdmin = _pinotHelixResourceManager.getHelixAdmin();
 ControllerRequestBuilderUtil
   .addFakeDataInstancesToAutoJoinHelixCluster(HELIX_CLUSTER_NAME, ZkStarter.DEFAULT_ZK_STR, 1, true);
 ControllerRequestBuilderUtil
   .addFakeBrokerInstancesToAutoJoinHelixCluster(HELIX_CLUSTER_NAME, ZkStarter.DEFAULT_ZK_STR, 1, true);
 Assert.assertEquals(_helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_BROKER").size(), 1);
 Assert
   .assertEquals(_helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_OFFLINE").size(), 1);
 Assert
   .assertEquals(_helixAdmin.getInstancesInClusterWithTag(HELIX_CLUSTER_NAME, "DefaultTenant_REALTIME").size(), 1);
 // Adding table
 TableConfig tableConfig =
   new TableConfig.Builder(CommonConstants.Helix.TableType.OFFLINE).setTableName(TABLE_NAME).build();
 _pinotHelixResourceManager.addTable(tableConfig);
}

代码示例来源：origin: apache/helix

new ZkClient(ZK_ADDR, HelixZkClient.DEFAULT_SESSION_TIMEOUT,
    HelixZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
client.delete(path);
client.subscribeDataChanges(path, listener);
client.subscribeChildChanges(path, listener);
  "fail to get data-delete callback after session-expiry");
client.close();

代码示例来源：origin: apache/helix

@Test
public void testZkSessionExpiry() throws Exception {
 String className = TestHelper.getTestClassName();
 String methodName = TestHelper.getTestMethodName();
 String clusterName = className + "_" + methodName;
 System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
 ZkClient client =
   new ZkClient(ZK_ADDR, HelixZkClient.DEFAULT_SESSION_TIMEOUT,
     HelixZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
 String path = String.format("/%s", clusterName);
 client.createEphemeral(path);
 String oldSessionId = ZkTestHelper.getSessionId(client);
 ZkTestHelper.expireSession(client);
 String newSessionId = ZkTestHelper.getSessionId(client);
 Assert.assertNotSame(newSessionId, oldSessionId);
 Assert.assertFalse(client.exists(path), "Ephemeral znode should be gone after session expiry");
 client.close();
 System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}

代码示例来源：origin: org.apache.helix/helix-core

public void post(String zkServer, Message message, String clusterName, String instanceName) {
 ZkClient client = new ZkClient(zkServer);
 client.setZkSerializer(new ZNRecordSerializer());
 String path = PropertyPathBuilder.instanceMessage(clusterName, instanceName, message.getId());
 client.delete(path);
 ZNRecord record = client.readData(PropertyPathBuilder.liveInstance(clusterName, instanceName));
 message.setTgtSessionId(record.getSimpleField(LiveInstanceProperty.SESSION_ID.toString()));
 message.setTgtName(record.getId());
 // System.out.println(message);
 client.createPersistent(path, message.getRecord());
}

代码示例来源：origin: org.apache.helix/helix-core

public static void main(String[] args) {
 ZkClient zkclient = new ZkClient("localhost:2191");
 zkclient.setZkSerializer(new ZNRecordSerializer());
 ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(zkclient);
 zkclient.close();

代码示例来源：origin: apache/helix

@Test
public void testCloseZkClient() {
 String className = TestHelper.getTestClassName();
 String methodName = TestHelper.getTestMethodName();
 String clusterName = className + "_" + methodName;
 System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
 ZkClient client =
   new ZkClient(ZK_ADDR, HelixZkClient.DEFAULT_SESSION_TIMEOUT,
     HelixZkClient.DEFAULT_CONNECTION_TIMEOUT, new ZNRecordSerializer());
 String path = String.format("/%s", clusterName);
 client.createEphemeral(path);
 client.close();
 Assert.assertFalse(_gZkClient.exists(path), "Ephemeral node: " + path
   + " should be removed after ZkClient#close()");
 System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}

代码示例来源：origin: org.apache.helix/helix-core

zkClient.createEphemeral("/" + clusterName + "/CONFIGS/CLUSTER/verify");
} catch (ZkNodeExistsException ex) {
 LOG.error("There is already a verification in progress", ex);
zkClient.subscribeChildChanges(extViewPath, listener);
for (String child : zkClient.getChildren(extViewPath)) {
 String childPath = extViewPath.equals("/") ? extViewPath + child : extViewPath + "/" + child;
 zkClient.subscribeDataChanges(childPath, listener);
zkClient.unsubscribeChildChanges(extViewPath, listener);
for (String child : zkClient.getChildren(extViewPath)) {
 String childPath = extViewPath.equals("/") ? extViewPath + child : extViewPath + "/" + child;
 zkClient.unsubscribeDataChanges(childPath, listener);
zkClient.delete("/" + clusterName + "/CONFIGS/CLUSTER/verify");

代码示例来源：origin: apache/helix

ZkClient zkClient = ZKClientPool.getZkClient(zkAddr);
zkClient.createPersistent("/" + testName, new ZNRecord(testName));
ZNRecord record = zkClient.readData("/" + testName);
Assert.assertEquals(record.getId(), testName);
try {
 zkClient = ZKClientPool.getZkClient(zkAddr);
 record = zkClient.readData("/" + testName);
 Assert.fail("should fail on zk no node exception");
} catch (ZkNoNodeException e) {
zkClient.createPersistent("/" + testName, new ZNRecord(testName));
record = zkClient.readData("/" + testName);
Assert.assertEquals(record.getId(), testName);
zkClient.close();
TestHelper.stopZkServer(zkServer);
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));

代码示例来源：origin: org.apache.helix/helix-core

synchronized (this) {
 if (_zkclient != null) {
  _zkclient.close();
_zkclient.subscribeStateChanges(this);
int retryCount = 0;
while (retryCount < 3) {
 try {
  _zkclient.waitUntilConnected(_connectionInitTimeout, TimeUnit.MILLISECONDS);
  handleStateChanged(KeeperState.SyncConnected);
  handleNewSession();

代码示例来源：origin: org.apache.helix/helix-core

public static void createOrReplace(ZkClient client, String path, final ZNRecord record,
  final boolean persistent) {
 int retryCount = 0;
 while (retryCount < RETRYLIMIT) {
  try {
   if (client.exists(path)) {
    DataUpdater<Object> updater = new DataUpdater<Object>() {
     @Override
     public Object update(Object currentData) {
      return record;
     }
    };
    client.updateDataSerialized(path, updater);
   } else {
    CreateMode mode = (persistent) ? CreateMode.PERSISTENT : CreateMode.EPHEMERAL;
    client.create(path, record, mode);
   }
   break;
  } catch (Exception e) {
   retryCount = retryCount + 1;
   logger.warn("Exception trying to createOrReplace " + path + " Exception:" + e.getMessage()
     + ". Will retry.");
  }
 }
}

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