org.apache.hadoop.hbase.security.access
Class ZKPermissionWatcher

java.lang.Object
  org.apache.hadoop.hbase.zookeeper.ZooKeeperListener
      org.apache.hadoop.hbase.security.access.ZKPermissionWatcher

All Implemented Interfaces:

Closeable

@InterfaceAudience.Private
public class ZKPermissionWatcher
extends ZooKeeperListener
implements Closeable

Handles synchronization of access control list entries and updates throughout all nodes in the cluster. The AccessController instance on the _acl_ table regions, creates a znode for each table as /hbase/acl/tablename, with the znode data containing a serialized list of the permissions granted for the table. The AccessController instances on all other cluster hosts watch the znodes for updates, which trigger updates in the TableAuthManager permission cache.

Field Summary

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

watcher

Constructor Summary

ZKPermissionWatcher(ZooKeeperWatcher watcher, TableAuthManager authManager, org.apache.hadoop.conf.Configuration conf)

Method Summary

void	close()
void	deleteNamespaceACLNode(String namespace) Delete the acl notify node of namespace
void	deleteTableACLNode(TableName tableName) Delete the acl notify node of table
void	nodeChildrenChanged(String path)
void	nodeCreated(String path)
void	nodeDataChanged(String path)
void	nodeDeleted(String path)
void	start()
void	writeToZookeeper(byte[] entry, byte[] permsData) Write a table's access controls to the permissions mirror in zookeeper

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

getWatcher

Methods inherited from class java.lang.Object

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

Constructor Detail

ZKPermissionWatcher

public ZKPermissionWatcher(ZooKeeperWatcher watcher,
                           TableAuthManager authManager,
                           org.apache.hadoop.conf.Configuration conf)

Method Detail

start

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

Throws:

org.apache.zookeeper.KeeperException

close

public void close()

Specified by:

close in interface Closeable

nodeCreated

public void nodeCreated(String path)

Overrides:

nodeCreated in class ZooKeeperListener

nodeDeleted

public void nodeDeleted(String path)

Overrides:

nodeDeleted in class ZooKeeperListener

nodeDataChanged

public void nodeDataChanged(String path)

Overrides:

nodeDataChanged in class ZooKeeperListener

nodeChildrenChanged

public void nodeChildrenChanged(String path)

Overrides:

nodeChildrenChanged in class ZooKeeperListener

writeToZookeeper

public void writeToZookeeper(byte[] entry,
                             byte[] permsData)

Write a table's access controls to the permissions mirror in zookeeper

Parameters:

entry -

permsData -

deleteTableACLNode

public void deleteTableACLNode(TableName tableName)

Delete the acl notify node of table

Parameters:

tableName -

deleteNamespaceACLNode

public void deleteNamespaceACLNode(String namespace)

Delete the acl notify node of namespace