org.apache.hadoop.hbase.io.hfile

Class TestHFileBlockIndex.BlockReaderWrapper

java.lang.Object

org.apache.hadoop.hbase.io.hfile.TestHFileBlockIndex.BlockReaderWrapper

All Implemented Interfaces:

org.apache.hadoop.hbase.io.hfile.HFile.CachingBlockReader

Enclosing class:

TestHFileBlockIndex

private static class TestHFileBlockIndex.BlockReaderWrapper
extends Object
implements org.apache.hadoop.hbase.io.hfile.HFile.CachingBlockReader

A wrapper around a block reader which only caches the results of the last operation. Not thread-safe.

Field Summary

Fields

Modifier and Type	Field and Description
int	hitCount
int	missCount
private org.apache.hadoop.hbase.io.hfile.HFileBlock	prevBlock
private long	prevOffset
private long	prevOnDiskSize
private boolean	prevPread
private org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader	realReader

Constructor Summary

Constructors

Constructor and Description
BlockReaderWrapper(org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader realReader)

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.hbase.io.hfile.HFileBlock	readBlock(long offset, long onDiskSize, boolean cacheBlock, boolean pread, boolean isCompaction, boolean updateCacheMetrics, org.apache.hadoop.hbase.io.hfile.BlockType expectedBlockType, org.apache.hadoop.hbase.io.encoding.DataBlockEncoding expectedDataBlockEncoding)
void	returnBlock(org.apache.hadoop.hbase.io.hfile.HFileBlock block)

Methods inherited from class java.lang.Object

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

Field Detail

realReader

private org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader realReader

prevOffset

private long prevOffset

prevOnDiskSize

private long prevOnDiskSize

prevPread

private boolean prevPread

prevBlock

private org.apache.hadoop.hbase.io.hfile.HFileBlock prevBlock

hitCount

public int hitCount

missCount

public int missCount

Constructor Detail

BlockReaderWrapper

public BlockReaderWrapper(org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader realReader)

Method Detail

returnBlock

public void returnBlock(org.apache.hadoop.hbase.io.hfile.HFileBlock block)

Specified by:

returnBlock in interface org.apache.hadoop.hbase.io.hfile.HFile.CachingBlockReader

readBlock

public org.apache.hadoop.hbase.io.hfile.HFileBlock readBlock(long offset,
                                                             long onDiskSize,
                                                             boolean cacheBlock,
                                                             boolean pread,
                                                             boolean isCompaction,
                                                             boolean updateCacheMetrics,
                                                             org.apache.hadoop.hbase.io.hfile.BlockType expectedBlockType,
                                                             org.apache.hadoop.hbase.io.encoding.DataBlockEncoding expectedDataBlockEncoding)
                                                      throws IOException

Specified by:

readBlock in interface org.apache.hadoop.hbase.io.hfile.HFile.CachingBlockReader

Throws:

IOException