org.apache.hadoop.hdfs.server.datanode

Enum FileIoProvider.OPERATION

java.lang.Object

java.lang.Enum<FileIoProvider.OPERATION>

org.apache.hadoop.hdfs.server.datanode.FileIoProvider.OPERATION

All Implemented Interfaces:

Serializable, Comparable<FileIoProvider.OPERATION>

Enclosing class:

org.apache.hadoop.hdfs.server.datanode.FileIoProvider

public static enum FileIoProvider.OPERATION
extends Enum<FileIoProvider.OPERATION>

Lists the types of file system operations. Passed to the IO hooks so implementations can choose behavior based on specific operations.

Enum Constant Summary

Enum Constants

Enum Constant and Description
DELETE
EXISTS
FADVISE
FLUSH
LIST
MKDIRS
MOVE
NATIVE_COPY
OPEN
READ
SYNC
TRANSFER
WRITE

Method Summary

Modifier and Type	Method and Description
static FileIoProvider.OPERATION	valueOf(String name) Returns the enum constant of this type with the specified name.
static FileIoProvider.OPERATION[]	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

OPEN

public static final FileIoProvider.OPERATION OPEN

EXISTS

public static final FileIoProvider.OPERATION EXISTS

LIST

public static final FileIoProvider.OPERATION LIST

DELETE

public static final FileIoProvider.OPERATION DELETE

MOVE

public static final FileIoProvider.OPERATION MOVE

MKDIRS

public static final FileIoProvider.OPERATION MKDIRS

TRANSFER

public static final FileIoProvider.OPERATION TRANSFER

SYNC

public static final FileIoProvider.OPERATION SYNC

FADVISE

public static final FileIoProvider.OPERATION FADVISE

READ

public static final FileIoProvider.OPERATION READ

WRITE

public static final FileIoProvider.OPERATION WRITE

FLUSH

public static final FileIoProvider.OPERATION FLUSH

NATIVE_COPY

public static final FileIoProvider.OPERATION NATIVE_COPY

Method Detail

values

public static FileIoProvider.OPERATION[] 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 (FileIoProvider.OPERATION c : FileIoProvider.OPERATION.values())
    System.out.println(c);

Returns:

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

valueOf

public static FileIoProvider.OPERATION 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