org.apache.hadoop.hdfs.server.common

Enum DataNodeLockManager.LockLevel

java.lang.Object

java.lang.Enum<DataNodeLockManager.LockLevel>

org.apache.hadoop.hdfs.server.common.DataNodeLockManager.LockLevel

All Implemented Interfaces:

Serializable, Comparable<DataNodeLockManager.LockLevel>

Enclosing interface:

DataNodeLockManager<T extends AutoCloseDataSetLock>

public static enum DataNodeLockManager.LockLevel
extends Enum<DataNodeLockManager.LockLevel>

Acquire block pool level first if you want to Acquire volume lock. Or only acquire block pool level lock.

Enum Constant Summary

Enum Constants

Enum Constant and Description
BLOCK_POOl
VOLUME

Method Summary

Modifier and Type	Method and Description
static DataNodeLockManager.LockLevel	valueOf(String name) Returns the enum constant of this type with the specified name.
static DataNodeLockManager.LockLevel[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

BLOCK_POOl

public static final DataNodeLockManager.LockLevel BLOCK_POOl

VOLUME

public static final DataNodeLockManager.LockLevel VOLUME

Method Detail

values

public static DataNodeLockManager.LockLevel[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (DataNodeLockManager.LockLevel c : DataNodeLockManager.LockLevel.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DataNodeLockManager.LockLevel valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null