alluxio.wire

Class BlockReadRequest

java.lang.Object

alluxio.wire.BlockReadRequest

@ThreadSafe
public final class BlockReadRequest
extends Object

The internal representation of a block read request.

Constructor Summary

Constructors

Constructor and Description
BlockReadRequest(long id, long start, long end, long chunkSize, boolean promote, boolean positionShort, Protocol.OpenUfsBlockOptions openUfsBlockOptions) Creates an instance of BlockReadRequest.
BlockReadRequest(ReadRequest request) Creates an instance of BlockReadRequest.

Method Summary

Modifier and Type	Method and Description
long	getChunkSize()
long	getEnd()
long	getId()
Protocol.OpenUfsBlockOptions	getOpenUfsBlockOptions()
long	getSessionId()
long	getStart()
boolean	isPersisted()
boolean	isPositionShort()
boolean	isPromote()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockReadRequest

public BlockReadRequest(ReadRequest request)

Creates an instance of BlockReadRequest.

Parameters:

request - the block read request

BlockReadRequest

public BlockReadRequest(long id,
                        long start,
                        long end,
                        long chunkSize,
                        boolean promote,
                        boolean positionShort,
                        Protocol.OpenUfsBlockOptions openUfsBlockOptions)

Creates an instance of BlockReadRequest.

Parameters:

id - block id

start - start offset of this request

end - start offset of this request

chunkSize - chunk size in bytes

promote - whether to promote the block to top tier

positionShort - whether this is a short read

openUfsBlockOptions - options to read file from UFS

Method Detail

getSessionId

public long getSessionId()

Returns:

session Id

getId

public long getId()

Returns:

block id of the read request

getStart

public long getStart()

Returns:

the start offset in bytes of this read request

getEnd

public long getEnd()

Returns:

the end offset in bytes of this read request

getChunkSize

public long getChunkSize()

Returns:

the chunk size in bytes of this read request

isPromote

public boolean isPromote()

Returns:

if the block read type indicate promote in tier storage

isPositionShort

public boolean isPositionShort()

Returns:

if this is a positioned read to a small buffer

getOpenUfsBlockOptions

public Protocol.OpenUfsBlockOptions getOpenUfsBlockOptions()

Returns:

the option to open UFS block

isPersisted

public boolean isPersisted()

Returns:

true if the block is persisted in UFS

toString

public String toString()

Overrides:

toString in class Object