org.apache.hadoop.hbase.io.hfile

Class HFileBlock.PrefetchedHeader

java.lang.Object

org.apache.hadoop.hbase.io.hfile.HFileBlock.PrefetchedHeader

Enclosing class:

HFileBlock

private static class HFileBlock.PrefetchedHeader
extends Object

Data-structure to use caching the header of the NEXT block. Only works if next read that comes in here is next in sequence in this block. When we read, we read current block and the next blocks' header. We do this so we have the length of the next block to read if the hfile index is not available (rare, at hfile open only).

Field Summary

Fields

Modifier and Type	Field and Description
(package private) ByteBuffer	buf
(package private) byte[]	header
(package private) long	offset

Constructor Summary

Constructors

Modifier	Constructor and Description
private	PrefetchedHeader()

Method Summary

Modifier and Type	Method and Description
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

offset

long offset

header

byte[] header

buf

final ByteBuffer buf

Constructor Detail

PrefetchedHeader

private PrefetchedHeader()

Method Detail

toString

public String toString()

Overrides:

toString in class Object