Java Code Examples for org.apache.hadoop.hbase.zookeeper.ZKUtil#getNodeName()

The following examples show how to use org.apache.hadoop.hbase.zookeeper.ZKUtil#getNodeName() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: ZKSecretWatcher.java From hbase with Apache License 2.0

6 votes

private void refreshNodes(List<ZKUtil.NodeAndData> nodes) {
  for (ZKUtil.NodeAndData n : nodes) {
    String path = n.getNode();
    String keyId = ZKUtil.getNodeName(path);
    try {
      byte[] data = n.getData();
      if (data == null || data.length == 0) {
        LOG.debug("Ignoring empty node "+path);
        continue;
      }
      AuthenticationKey key = (AuthenticationKey)Writables.getWritable(
          data, new AuthenticationKey());
      secretManager.addKey(key);
    } catch (IOException ioe) {
      LOG.error(HBaseMarkers.FATAL, "Failed reading new secret key for id '" +
          keyId + "' from zk", ioe);
      watcher.abort("Error deserializing key from znode "+path, ioe);
    }
  }
}

Example 2

Source File: ZKPermissionWatcher.java From hbase with Apache License 2.0

6 votes

private void refreshNodes(List<ZKUtil.NodeAndData> nodes) {
  for (ZKUtil.NodeAndData n : nodes) {
    if (Thread.interrupted()) {
      // Use Thread.interrupted so that we clear interrupt status
      break;
    }
    if (n.isEmpty()) continue;
    String path = n.getNode();
    String entry = (ZKUtil.getNodeName(path));
    try {
      refreshAuthManager(entry, n.getData());
    } catch (IOException ioe) {
      LOG.error("Failed parsing permissions for table '" + entry +
          "' from zk", ioe);
    }
  }
}

Example 3

Source File: ZKSecretWatcher.java From hbase with Apache License 2.0

5 votes

@Override
public void nodeDeleted(String path) {
  if (keysParentZNode.equals(ZKUtil.getParent(path))) {
    String keyId = ZKUtil.getNodeName(path);
    try {
      Integer id = Integer.valueOf(keyId);
      secretManager.removeKey(id);
      LOG.info("Node deleted id={}", id);
    } catch (NumberFormatException nfe) {
      LOG.error("Invalid znode name for key ID '"+keyId+"'", nfe);
    }
  }
}

Example 4

Source File: ZKProcedureMemberRpcs.java From hbase with Apache License 2.0

4 votes

/**
 * Pass along the procedure global barrier notification to any listeners
 * @param path full znode path that cause the notification
 */
private void receivedReachedGlobalBarrier(String path) {
  LOG.debug("Received reached global barrier:" + path);
  String procName = ZKUtil.getNodeName(path);
  this.member.receivedReachedGlobalBarrier(procName);
}

Example 5

Source File: ZKProcedureCoordinator.java From hbase with Apache License 2.0

4 votes

/**
 * Start monitoring znodes in ZK - subclass hook to start monitoring znodes they are about.
 * @return true if succeed, false if encountered initialization errors.
 */
@Override
final public boolean start(final ProcedureCoordinator coordinator) {
  if (this.coordinator != null) {
    throw new IllegalStateException(
      "ZKProcedureCoordinator already started and already has listener installed");
  }
  this.coordinator = coordinator;

  try {
    this.zkProc = new ZKProcedureUtil(watcher, procedureType) {
      @Override
      public void nodeCreated(String path) {
        if (!isInProcedurePath(path)) return;
        LOG.debug("Node created: " + path);
        logZKTree(this.baseZNode);
        if (isAcquiredPathNode(path)) {
          // node wasn't present when we created the watch so zk event triggers acquire
          coordinator.memberAcquiredBarrier(ZKUtil.getNodeName(ZKUtil.getParent(path)),
            ZKUtil.getNodeName(path));
        } else if (isReachedPathNode(path)) {
          // node was absent when we created the watch so zk event triggers the finished barrier.

          // TODO Nothing enforces that acquire and reached znodes from showing up in wrong order.
          String procName = ZKUtil.getNodeName(ZKUtil.getParent(path));
          String member = ZKUtil.getNodeName(path);
          // get the data from the procedure member
          try {
            byte[] dataFromMember = ZKUtil.getData(watcher, path);
            // ProtobufUtil.isPBMagicPrefix will check null
            if (dataFromMember != null && dataFromMember.length > 0) {
              if (!ProtobufUtil.isPBMagicPrefix(dataFromMember)) {
                ForeignException ee = new ForeignException(coordName,
                  "Failed to get data from finished node or data is illegally formatted:"
                      + path);
                coordinator.abortProcedure(procName, ee);
              } else {
                dataFromMember = Arrays.copyOfRange(dataFromMember, ProtobufUtil.lengthOfPBMagic(),
                  dataFromMember.length);
                LOG.debug("Finished data from procedure '{}' member '{}': {}", procName, member,
                    new String(dataFromMember, StandardCharsets.UTF_8));
                coordinator.memberFinishedBarrier(procName, member, dataFromMember);
              }
            } else {
              coordinator.memberFinishedBarrier(procName, member, dataFromMember);
            }
          } catch (KeeperException e) {
            ForeignException ee = new ForeignException(coordName, e);
            coordinator.abortProcedure(procName, ee);
          } catch (InterruptedException e) {
            ForeignException ee = new ForeignException(coordName, e);
            coordinator.abortProcedure(procName, ee);
          }
        } else if (isAbortPathNode(path)) {
          abort(path);
        } else {
          LOG.debug("Ignoring created notification for node:" + path);
        }
      }
    };
    zkProc.clearChildZNodes();
  } catch (KeeperException e) {
    LOG.error("Unable to start the ZK-based Procedure Coordinator rpcs.", e);
    return false;
  }

  LOG.debug("Starting controller for procedure member=" + coordName);
  return true;
}