org.apache.hadoop.hdfs.server.namenode

Class EncryptionZoneManager

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.EncryptionZoneManager

public class EncryptionZoneManager
extends Object

Manages the list of encryption zones in the filesystem.

The EncryptionZoneManager has its own lock, but relies on the FSDirectory lock being held for many operations. The FSDirectory lock should not be taken if the manager lock is already held.

Field Summary

Fields

Modifier and Type	Field and Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
EncryptionZoneManager(org.apache.hadoop.hdfs.server.namenode.FSDirectory dir, Configuration conf) Construct a new EncryptionZoneManager.

Method Summary

Modifier and Type	Method and Description
int	getNumEncryptionZones()
boolean	hasCreatedEncryptionZone()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static org.slf4j.Logger LOG

Constructor Detail

EncryptionZoneManager

public EncryptionZoneManager(org.apache.hadoop.hdfs.server.namenode.FSDirectory dir,
                             Configuration conf)

Construct a new EncryptionZoneManager.

Parameters:

dir - Enclosing FSDirectory

Method Detail

getNumEncryptionZones

public int getNumEncryptionZones()

Returns:

number of encryption zones.

hasCreatedEncryptionZone

public boolean hasCreatedEncryptionZone()

Returns:

Whether there has been any attempt to create an encryption zone in the cluster at all. If not, it is safe to quickly return null when checking the encryption information of any file or directory in the cluster.