org.apache.hadoop.hbase.util

类 CompoundBloomFilter

java.lang.Object

org.apache.hadoop.hbase.util.CompoundBloomFilterBase

org.apache.hadoop.hbase.util.CompoundBloomFilter

所有已实现的接口:

BloomFilter, BloomFilterBase

@InterfaceAudience.Private
public class CompoundBloomFilter
extends CompoundBloomFilterBase
implements BloomFilter

A Bloom filter implementation built on top of ByteBloomFilter, encapsulating a set of fixed-size Bloom filters written out at the time of HFile generation into the data block stream, and loaded on demand at query time. This class only provides reading capabilities.

字段概要

从类继承的字段 org.apache.hadoop.hbase.util.CompoundBloomFilterBase

comparator, errorRate, hashType, numChunks, totalByteSize, totalKeyCount, totalMaxKeys, VERSION

构造器概要

构造器

构造器和说明
CompoundBloomFilter(DataInput meta, HFile.Reader reader) De-serialization for compound Bloom filter metadata.

方法概要

方法

限定符和类型	方法和说明
boolean	contains(byte[] key, int keyOffset, int keyLength, ByteBuffer bloom) Check if the specified key is contained in the bloom filter.
void	enableTestingStats()
String	formatTestingStats()
KeyValue.KVComparator	getComparator()
int	getNumChunks()
long	getNumPositivesForTesting(int chunk)
long	getNumQueriesForTesting(int chunk)
boolean	supportsAutoLoading()
String	toString()

从类继承的方法 org.apache.hadoop.hbase.util.CompoundBloomFilterBase

createBloomKey, getByteSize, getKeyCount, getMaxKeys

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.util.BloomFilterBase

createBloomKey, getByteSize, getKeyCount, getMaxKeys

构造器详细资料

CompoundBloomFilter

public CompoundBloomFilter(DataInput meta,
                   HFile.Reader reader)
                    throws IOException

De-serialization for compound Bloom filter metadata. Must be consistent with what CompoundBloomFilterWriter does.

参数:

meta - serialized Bloom filter metadata without any magic blocks

抛出:

IOException

方法详细资料

contains

public boolean contains(byte[] key,
               int keyOffset,
               int keyLength,
               ByteBuffer bloom)

从接口复制的说明: BloomFilter

Check if the specified key is contained in the bloom filter.

指定者:

contains 在接口中 BloomFilter

参数:

key - data to check for existence of

keyOffset - offset into the data

keyLength - length of the data

bloom - bloom filter data to search. This can be null if auto-loading is supported.

返回:

true if matched by bloom, false if not

supportsAutoLoading

public boolean supportsAutoLoading()

指定者:

supportsAutoLoading 在接口中 BloomFilter

返回:

true if this Bloom filter can automatically load its data and thus allows a null byte buffer to be passed to contains()

getNumChunks

public int getNumChunks()

getComparator

public KeyValue.KVComparator getComparator()

指定者:

getComparator 在接口中 BloomFilterBase

覆盖:

getComparator 在类中 CompoundBloomFilterBase

返回:

Bloom key comparator

enableTestingStats

public void enableTestingStats()

formatTestingStats

public String formatTestingStats()

getNumQueriesForTesting

public long getNumQueriesForTesting(int chunk)

getNumPositivesForTesting

public long getNumPositivesForTesting(int chunk)

toString

public String toString()

覆盖:

toString 在类中 Object