org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndWatch()方法的使用及代码示例

x33g5p2x  于2022-02-05 转载在 其他  
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本文整理了Java中org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndWatch()方法的一些代码示例，展示了ZKUtil.createAndWatch()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。ZKUtil.createAndWatch()方法的具体详情如下：
包路径：org.apache.hadoop.hbase.zookeeper.ZKUtil
类名称：ZKUtil
方法名：createAndWatch

ZKUtil.createAndWatch介绍

[英]Creates the specified node with the specified data and watches it.

Throws an exception if the node already exists.

The node created is persistent and open access.

Returns the version number of the created node if successful.
[中]使用指定的数据创建指定的节点并监视它。
如果节点已存在，则引发异常。
创建的节点是持久的、开放访问的。
如果成功，返回所创建节点的版本号。

代码示例

代码示例来源：origin: apache/hbase

/**
 * Set the switch on/off
 * @param enabled switch enabled or not?
 * @throws KeeperException keepException will be thrown out
 */
public void setSwitchEnabled(boolean enabled) throws KeeperException {
 byte [] upData = toByteArray(enabled);
 try {
  ZKUtil.setData(watcher, node, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, node, upData);
 }
 super.nodeDataChanged(node);
}

代码示例来源：origin: apache/hbase

/**
 * Sets the cluster as up.
 * @throws KeeperException unexpected zk exception
 */
public void setClusterUp()
 throws KeeperException {
 byte [] upData = toByteArray();
 try {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().clusterStateZNode, upData);
 } catch(KeeperException.NodeExistsException nee) {
  ZKUtil.setData(watcher, watcher.getZNodePaths().clusterStateZNode, upData);
 }
}

代码示例来源：origin: apache/hbase

/**
 * Set region normalizer on/off
 * @param normalizerOn whether normalizer should be on or off
 * @throws KeeperException if a ZooKeeper operation fails
 */
public void setNormalizerOn(boolean normalizerOn) throws KeeperException {
 byte [] upData = toByteArray(normalizerOn);
 try {
  ZKUtil.setData(watcher, watcher.getZNodePaths().regionNormalizerZNode, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().regionNormalizerZNode, upData);
 }
 super.nodeDataChanged(watcher.getZNodePaths().regionNormalizerZNode);
}

代码示例来源：origin: apache/hbase

/**
 * Set the balancer on/off.
 *
 * @param balancerOn true if the balancher should be on, false otherwise
 * @throws KeeperException if a ZooKeeper operation fails
 */
public void setBalancerOn(boolean balancerOn) throws KeeperException {
 byte [] upData = toByteArray(balancerOn);
 try {
  ZKUtil.setData(watcher, watcher.getZNodePaths().balancerZNode, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().balancerZNode, upData);
 }
 super.nodeDataChanged(watcher.getZNodePaths().balancerZNode);
}

代码示例来源：origin: apache/hbase

", create it");
ZKUtil.createAndWatch(zookeeper, zookeeper.getZNodePaths().getZNodeForReplica(replicaId),
    data);

代码示例来源：origin: apache/hbase

@Test
public void testRegionServerRemovedEvent() throws Exception {
 ZKUtil.createAndWatch(zkw,
  ZNodePaths.joinZNode(zkw.getZNodePaths().rsZNode, "hostname2.example.org:1234"),
  HConstants.EMPTY_BYTE_ARRAY);
 rt.registerListener(new DummyReplicationListener());
 // delete one
 ZKUtil.deleteNode(zkw,
  ZNodePaths.joinZNode(zkw.getZNodePaths().rsZNode, "hostname2.example.org:1234"));
 // wait for event
 while (rsRemovedCount.get() < 1) {
  Thread.sleep(5);
 }
 assertEquals("hostname2.example.org:1234", rsRemovedData);
}

代码示例来源：origin: co.cask.hbase/hbase

/**
 * Sets the cluster as up.
 * @throws KeeperException unexpected zk exception
 */
public void setClusterUp()
throws KeeperException {
 byte [] upData = Bytes.toBytes(new java.util.Date().toString());
 try {
  ZKUtil.createAndWatch(watcher, watcher.clusterStateZNode, upData);
 } catch(KeeperException.NodeExistsException nee) {
  ZKUtil.setData(watcher, watcher.clusterStateZNode, upData);
 }
}

代码示例来源：origin: harbby/presto-connectors

/**
 * Sets the cluster as up.
 * @throws KeeperException unexpected zk exception
 */
public void setClusterUp()
throws KeeperException {
 byte [] upData = toByteArray();
 try {
  ZKUtil.createAndWatch(watcher, watcher.clusterStateZNode, upData);
 } catch(KeeperException.NodeExistsException nee) {
  ZKUtil.setData(watcher, watcher.clusterStateZNode, upData);
 }
}

代码示例来源：origin: co.cask.hbase/hbase

/**
  * Sets the location of <code>-ROOT-</code> in ZooKeeper to the
  * specified server address.
  * @param zookeeper zookeeper reference
  * @param location The server hosting <code>-ROOT-</code>
  * @throws KeeperException unexpected zookeeper exception
  */
 public static void setRootLocation(ZooKeeperWatcher zookeeper,
   final ServerName location)
 throws KeeperException {
  LOG.info("Setting ROOT region location in ZooKeeper as " + location);
  try {
   ZKUtil.createAndWatch(zookeeper, zookeeper.rootServerZNode,
    Bytes.toBytes(location.toString()));
  } catch(KeeperException.NodeExistsException nee) {
   LOG.debug("ROOT region location already existed, updated location");
   ZKUtil.setData(zookeeper, zookeeper.rootServerZNode,
     Bytes.toBytes(location.toString()));
  }
 }
}

代码示例来源：origin: harbby/presto-connectors

/**
 * Set the balancer on/off
 * @param balancerOn
 * @throws KeeperException
 */
public void setBalancerOn(boolean balancerOn) throws KeeperException {
byte [] upData = toByteArray(balancerOn);
 try {
  ZKUtil.setData(watcher, watcher.balancerZNode, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.balancerZNode, upData);
 }
 super.nodeDataChanged(watcher.balancerZNode);
}

代码示例来源：origin: co.cask.hbase/hbase

private void changePeerState(String id, PeerState state) throws IOException {
 try {
  if (!peerExists(id)) {
   throw new IllegalArgumentException("peer " + id + " is not registered");
  }
  String peerStateZNode = getPeerStateNode(id);
  if (ZKUtil.checkExists(this.zookeeper, peerStateZNode) != -1) {
   ZKUtil.setData(this.zookeeper, peerStateZNode,
    Bytes.toBytes(state.name()));
  } else {
   ZKUtil.createAndWatch(zookeeper, peerStateZNode,
     Bytes.toBytes(state.name()));
  }
  LOG.info("state of the peer " + id + " changed to " + state.name());
 } catch (KeeperException e) {
  throw new IOException("Unable to change state of the peer " + id, e);
 }
}

代码示例来源：origin: co.cask.hbase/hbase

/**
 * Add a new peer to this cluster
 * @param id peer's identifier
 * @param clusterKey ZK ensemble's addresses, client port and root znode
 * @throws IllegalArgumentException Thrown when the peer doesn't exist
 * @throws IllegalStateException Thrown when a peer already exists, since
 *         multi-slave isn't supported yet.
 */
public void addPeer(String id, String clusterKey) throws IOException {
 try {
  if (peerExists(id)) {
   throw new IllegalArgumentException("Cannot add existing peer");
  }
  ZKUtil.createWithParents(this.zookeeper, this.peersZNode);
  ZKUtil.createAndWatch(this.zookeeper, ZKUtil.joinZNode(this.peersZNode, id),
   Bytes.toBytes(clusterKey));
  // There is a race b/w PeerWatcher and ReplicationZookeeper#add method to create the
  // peer-state znode. This happens while adding a peer.
  // The peer state data is set as "ENABLED" by default.
  ZKUtil.createNodeIfNotExistsAndWatch(this.zookeeper, getPeerStateNode(id),
   Bytes.toBytes(PeerState.ENABLED.name()));
 } catch (KeeperException e) {
  throw new IOException("Unable to add peer", e);
 }
}

代码示例来源：origin: org.apache.hbase/hbase-zookeeper

/**
 * Sets the cluster as up.
 * @throws KeeperException unexpected zk exception
 */
public void setClusterUp()
 throws KeeperException {
 byte [] upData = toByteArray();
 try {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().clusterStateZNode, upData);
 } catch(KeeperException.NodeExistsException nee) {
  ZKUtil.setData(watcher, watcher.getZNodePaths().clusterStateZNode, upData);
 }
}

代码示例来源：origin: harbby/presto-connectors

@Override
public void setPeerTableCFsConfig(String id, String tableCFsStr) throws ReplicationException {
 try {
  if (!peerExists(id)) {
   throw new IllegalArgumentException("Cannot set peer tableCFs because id=" + id
     + " does not exist.");
  }
  String tableCFsZKNode = getTableCFsNode(id);
  byte[] tableCFs = Bytes.toBytes(tableCFsStr);
  if (ZKUtil.checkExists(this.zookeeper, tableCFsZKNode) != -1) {
   ZKUtil.setData(this.zookeeper, tableCFsZKNode, tableCFs);
  } else {
   ZKUtil.createAndWatch(this.zookeeper, tableCFsZKNode, tableCFs);
  }
  LOG.info("Peer tableCFs with id= " + id + " is now " + tableCFsStr);
 } catch (KeeperException e) {
  throw new ReplicationException("Unable to change tableCFs of the peer with id=" + id, e);
 }
}

代码示例来源：origin: co.cask.hbase/hbase

public static void createNodeOffline(ZooKeeperWatcher zkw, HRegionInfo region,
  ServerName serverName, final EventType event)
throws KeeperException, KeeperException.NodeExistsException {
 LOG.debug(zkw.prefix("Creating unassigned node for " +
  region.getEncodedName() + " in OFFLINE state"));
 RegionTransitionData data = new RegionTransitionData(event,
  region.getRegionName(), serverName);
 String node = getNodeName(zkw, region.getEncodedName());
 ZKUtil.createAndWatch(zkw, node, data.getBytes());
}

代码示例来源：origin: org.apache.hbase/hbase-zookeeper

/**
 * Set region normalizer on/off
 * @param normalizerOn whether normalizer should be on or off
 * @throws KeeperException if a ZooKeeper operation fails
 */
public void setNormalizerOn(boolean normalizerOn) throws KeeperException {
 byte [] upData = toByteArray(normalizerOn);
 try {
  ZKUtil.setData(watcher, watcher.getZNodePaths().regionNormalizerZNode, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().regionNormalizerZNode, upData);
 }
 super.nodeDataChanged(watcher.getZNodePaths().regionNormalizerZNode);
}

代码示例来源：origin: harbby/presto-connectors

/**
 * Set region normalizer on/off
 * @param normalizerOn whether normalizer should be on or off
 * @throws KeeperException
 */
public void setNormalizerOn(boolean normalizerOn) throws KeeperException {
 byte [] upData = toByteArray(normalizerOn);
 try {
  ZKUtil.setData(watcher, watcher.getRegionNormalizerZNode(), upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.getRegionNormalizerZNode(), upData);
 }
 super.nodeDataChanged(watcher.getRegionNormalizerZNode());
}

代码示例来源：origin: org.apache.hbase/hbase-zookeeper

/**
 * Set the balancer on/off.
 *
 * @param balancerOn true if the balancher should be on, false otherwise
 * @throws KeeperException if a ZooKeeper operation fails
 */
public void setBalancerOn(boolean balancerOn) throws KeeperException {
 byte [] upData = toByteArray(balancerOn);
 try {
  ZKUtil.setData(watcher, watcher.getZNodePaths().balancerZNode, upData);
 } catch(KeeperException.NoNodeException nne) {
  ZKUtil.createAndWatch(watcher, watcher.getZNodePaths().balancerZNode, upData);
 }
 super.nodeDataChanged(watcher.getZNodePaths().balancerZNode);
}

代码示例来源：origin: harbby/presto-connectors

public static void createNodeOffline(ZooKeeperWatcher zkw, HRegionInfo region,
  ServerName serverName, final EventType event)
throws KeeperException, KeeperException.NodeExistsException {
 LOG.debug(zkw.prefix("Creating unassigned node " +
  region.getEncodedName() + " in OFFLINE state"));
 RegionTransition rt =
  RegionTransition.createRegionTransition(event, region.getRegionName(), serverName);
 String node = getNodeName(zkw, region.getEncodedName());
 ZKUtil.createAndWatch(zkw, node, rt.toByteArray());
}

代码示例来源：origin: org.apache.hbase/hbase-server

@Test
public void testRegionServerRemovedEvent() throws Exception {
 ZKUtil.createAndWatch(zkw,
  ZNodePaths.joinZNode(zkw.getZNodePaths().rsZNode, "hostname2.example.org:1234"),
  HConstants.EMPTY_BYTE_ARRAY);
 rt.registerListener(new DummyReplicationListener());
 // delete one
 ZKUtil.deleteNode(zkw,
  ZNodePaths.joinZNode(zkw.getZNodePaths().rsZNode, "hostname2.example.org:1234"));
 // wait for event
 while (rsRemovedCount.get() < 1) {
  Thread.sleep(5);
 }
 assertEquals("hostname2.example.org:1234", rsRemovedData);
}

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