Package org.apache.hadoop.hbase.security.visibility

Class ZKVisibilityLabelWatcher

java.lang.Object

org.apache.hadoop.hbase.zookeeper.ZKListener

org.apache.hadoop.hbase.security.visibility.ZKVisibilityLabelWatcher

@Private
public class ZKVisibilityLabelWatcher
extends ZKListener

A zk watcher that watches the labels table znode. This would create a znode /hbase/visibility_labels and will have a serialized form of a set of labels in the system.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	DEFAULT_VISIBILITY_LABEL_NODE
private static final String	DEFAULT_VISIBILITY_USER_AUTHS_NODE
private VisibilityLabelsCache	labelsCache
private String	labelZnode
private static final org.slf4j.Logger	LOG
private String	userAuthsZnode
private static final String	VISIBILITY_LABEL_ZK_PATH
private static final String	VISIBILITY_USER_AUTHS_ZK_PATH

Fields inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

watcher

Constructor Summary

Constructors

Constructor	Description
ZKVisibilityLabelWatcher(ZKWatcher watcher, VisibilityLabelsCache labelsCache, org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method	Description
void	nodeChildrenChanged(String path)	Called when an existing node has a child node added or removed.
void	nodeCreated(String path)	Called when a new node has been created.
void	nodeDataChanged(String path)	Called when an existing node has changed data.
void	nodeDeleted(String path)	Called when a node has been deleted
private void	refreshUserAuthsCache(byte[] data)
private void	refreshVisibilityLabelsCache(byte[] data)
void	start()
void	writeToZookeeper(byte[] data, boolean labelsOrUserAuths)	Write a labels mirror or user auths mirror into zookeeper

Methods inherited from class org.apache.hadoop.hbase.zookeeper.ZKListener

getWatcher

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LOG

private static final org.slf4j.Logger LOG

VISIBILITY_LABEL_ZK_PATH

private static final String VISIBILITY_LABEL_ZK_PATH

See Also:

• Constant Field Values

DEFAULT_VISIBILITY_LABEL_NODE

private static final String DEFAULT_VISIBILITY_LABEL_NODE

See Also:

• Constant Field Values

VISIBILITY_USER_AUTHS_ZK_PATH

private static final String VISIBILITY_USER_AUTHS_ZK_PATH

See Also:

• Constant Field Values

DEFAULT_VISIBILITY_USER_AUTHS_NODE

private static final String DEFAULT_VISIBILITY_USER_AUTHS_NODE

See Also:

• Constant Field Values

labelsCache

private VisibilityLabelsCache labelsCache

labelZnode

private String labelZnode

userAuthsZnode

private String userAuthsZnode

Constructor Details

ZKVisibilityLabelWatcher

public ZKVisibilityLabelWatcher(ZKWatcher watcher,
 VisibilityLabelsCache labelsCache,
 org.apache.hadoop.conf.Configuration conf)

Method Details

start

public void start()
           throws org.apache.zookeeper.KeeperException

Throws:

org.apache.zookeeper.KeeperException

refreshVisibilityLabelsCache

private void refreshVisibilityLabelsCache(byte[] data)

refreshUserAuthsCache

private void refreshUserAuthsCache(byte[] data)

nodeCreated

public void nodeCreated(String path)

Description copied from class: ZKListener

Called when a new node has been created.

Overrides:

nodeCreated in class ZKListener

Parameters:

path - full path of the new node

nodeDeleted

public void nodeDeleted(String path)

Description copied from class: ZKListener

Called when a node has been deleted

Overrides:

nodeDeleted in class ZKListener

Parameters:

path - full path of the deleted node

nodeDataChanged

public void nodeDataChanged(String path)

Description copied from class: ZKListener

Called when an existing node has changed data.

Overrides:

nodeDataChanged in class ZKListener

Parameters:

path - full path of the updated node

nodeChildrenChanged

public void nodeChildrenChanged(String path)

Description copied from class: ZKListener

Called when an existing node has a child node added or removed.

Overrides:

nodeChildrenChanged in class ZKListener

Parameters:

path - full path of the node whose children have changed

writeToZookeeper

public void writeToZookeeper(byte[] data,
 boolean labelsOrUserAuths)

Write a labels mirror or user auths mirror into zookeeper

Parameters:

labelsOrUserAuths - true for writing labels and false for user auths.