org.apache.hadoop.hbase.io.hfile

Class BlockCacheUtil

java.lang.Object

org.apache.hadoop.hbase.io.hfile.BlockCacheUtil

@InterfaceAudience.Private
public class BlockCacheUtil
extends java.lang.Object

Utilty for aggregating counts in CachedBlocks and toString/toJSON CachedBlocks and BlockCaches. No attempt has been made at making this thread safe.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BlockCacheUtil.CachedBlocksByFile Use one of these to keep a running account of cached blocks by file.

Constructor Summary

Constructors

Constructor and Description
BlockCacheUtil()

Method Summary

Modifier and Type	Method and Description
static BlockCacheUtil.CachedBlocksByFile	getLoadedCachedBlocksByFile(Configuration conf, BlockCache bc) Get a BlockCacheUtil.CachedBlocksByFile instance and load it up by iterating content in BlockCache.
static java.lang.String	toJSON(BlockCache bc)
static java.lang.String	toJSON(BlockCacheUtil.CachedBlocksByFile cbsbf)
static java.lang.String	toJSON(java.lang.String filename, java.util.NavigableSet<CachedBlock> blocks)
static java.lang.String	toString(CachedBlock cb, long now)
static java.lang.String	toStringMinusFileName(CachedBlock cb, long now)

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockCacheUtil

public BlockCacheUtil()

Method Detail

toString

public static java.lang.String toString(CachedBlock cb,
                                        long now)

Parameters:

cb -

Returns:

The block content as String.

toJSON

public static java.lang.String toJSON(java.lang.String filename,
                                      java.util.NavigableSet<CachedBlock> blocks)
                               throws JsonGenerationException,
                                      JsonMappingException,
                                      java.io.IOException

Parameters:

filename -

blocks -

Returns:

A JSON String of filename and counts of blocks

Throws:

JsonGenerationException

JsonMappingException

java.io.IOException

toJSON

public static java.lang.String toJSON(BlockCacheUtil.CachedBlocksByFile cbsbf)
                               throws JsonGenerationException,
                                      JsonMappingException,
                                      java.io.IOException

Parameters:

cbsbf -

Returns:

JSON string of cbsf aggregated

Throws:

JsonGenerationException

JsonMappingException

java.io.IOException

toJSON

public static java.lang.String toJSON(BlockCache bc)
                               throws JsonGenerationException,
                                      JsonMappingException,
                                      java.io.IOException

Parameters:

bc -

Returns:

JSON string of bc content.

Throws:

JsonGenerationException

JsonMappingException

java.io.IOException

toStringMinusFileName

public static java.lang.String toStringMinusFileName(CachedBlock cb,
                                                     long now)

Parameters:

cb -

Returns:

The block content of bc as a String minus the filename.

getLoadedCachedBlocksByFile

public static BlockCacheUtil.CachedBlocksByFile getLoadedCachedBlocksByFile(Configuration conf,
                                                                            BlockCache bc)

Get a BlockCacheUtil.CachedBlocksByFile instance and load it up by iterating content in BlockCache.

Parameters:

conf - Used to read configurations

bc - Block Cache to iterate.

Returns:

Laoded up instance of CachedBlocksByFile