org.apache.hadoop.mapred

类 SequenceFileInputFilter.MD5Filter

java.lang.Object

org.apache.hadoop.mapred.SequenceFileInputFilter.FilterBase

org.apache.hadoop.mapred.SequenceFileInputFilter.MD5Filter

所有已实现的接口:

Configurable, SequenceFileInputFilter.Filter

封闭类:

SequenceFileInputFilter<K,V>

public static class SequenceFileInputFilter.MD5Filter
extends SequenceFileInputFilter.FilterBase

This class returns a set of records by examing the MD5 digest of its key against a filtering frequency f. The filtering criteria is MD5(key) % f == 0.

字段概要

字段

限定符和类型	字段和说明
static int	MD5_LEN

构造器概要

构造器

构造器和说明
SequenceFileInputFilter.MD5Filter()

方法概要

方法

限定符和类型	方法和说明
boolean	accept(Object key) Filtering method If MD5(key) % frequency==0, return true; otherwise return false
void	setConf(Configuration conf) configure the filter according to configuration
static void	setFrequency(Configuration conf, int frequency) set the filtering frequency in configuration

从类继承的方法 org.apache.hadoop.mapred.SequenceFileInputFilter.FilterBase

getConf

从类继承的方法 java.lang.Object

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

字段详细资料

MD5_LEN

public static final int MD5_LEN

另请参阅:

常量字段值

构造器详细资料

SequenceFileInputFilter.MD5Filter

public SequenceFileInputFilter.MD5Filter()

方法详细资料

setFrequency

public static void setFrequency(Configuration conf,
                int frequency)

set the filtering frequency in configuration

参数:

conf - configuration

frequency - filtering frequency

setConf

public void setConf(Configuration conf)

configure the filter according to configuration

参数:

conf - configuration

accept

public boolean accept(Object key)

Filtering method If MD5(key) % frequency==0, return true; otherwise return false

参数:

key - record key

返回:

true if a record is accepted; return false otherwise

另请参阅:

SequenceFileInputFilter.Filter.accept(Object)