org.apache.hadoop.hdfs.protocol.datatransfer

Enum Op

java.lang.Object

java.lang.Enum<Op>

org.apache.hadoop.hdfs.protocol.datatransfer.Op

All Implemented Interfaces:

Serializable, Comparable<Op>

@InterfaceAudience.Private
@InterfaceStability.Evolving
public enum Op
extends Enum<Op>

Operation

Enum Constant Summary

Enum Constants

Enum Constant and Description
BLOCK_CHECKSUM
COPY_BLOCK
READ_BLOCK
READ_METADATA
REPLACE_BLOCK
REQUEST_SHORT_CIRCUIT_FDS
TRANSFER_BLOCK
WRITE_BLOCK

Field Summary

Fields

Modifier and Type	Field and Description
byte	code The code for this operation.

Method Summary

Methods

Modifier and Type	Method and Description
static Op	read(DataInput in) Read from in
static Op	valueOf(String name) Returns the enum constant of this type with the specified name.
static Op[]	values() Returns an array containing the constants of this enum type, in the order they are declared.
void	write(DataOutput out) Write to out

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

WRITE_BLOCK

public static final Op WRITE_BLOCK

READ_BLOCK

public static final Op READ_BLOCK

READ_METADATA

public static final Op READ_METADATA

REPLACE_BLOCK

public static final Op REPLACE_BLOCK

COPY_BLOCK

public static final Op COPY_BLOCK

BLOCK_CHECKSUM

public static final Op BLOCK_CHECKSUM

TRANSFER_BLOCK

public static final Op TRANSFER_BLOCK

REQUEST_SHORT_CIRCUIT_FDS

public static final Op REQUEST_SHORT_CIRCUIT_FDS

Field Detail

code

public final byte code

The code for this operation.

Method Detail

values

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

Returns:

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

valueOf

public static Op 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

read

public static Op read(DataInput in)
               throws IOException

Read from in

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Write to out

Throws:

IOException