org.apache.hadoop.mapred

类 SequenceFileInputFilter.PercentFilter

java.lang.Object

org.apache.hadoop.mapred.SequenceFileInputFilter.FilterBase

org.apache.hadoop.mapred.SequenceFileInputFilter.PercentFilter

所有已实现的接口:

Configurable, SequenceFileInputFilter.Filter

封闭类:

SequenceFileInputFilter<K,V>

public static class SequenceFileInputFilter.PercentFilter
extends SequenceFileInputFilter.FilterBase

This class returns a percentage of records The percentage is determined by a filtering frequency f using the criteria record# % f == 0. For example, if the frequency is 10, one out of 10 records is returned.

构造器概要

构造器

构造器和说明
SequenceFileInputFilter.PercentFilter()

方法概要

方法

限定符和类型	方法和说明
boolean	accept(Object key) Filtering method If record# % frequency==0, return true; otherwise return false
void	setConf(Configuration conf) configure the filter by checking the configuration
static void	setFrequency(Configuration conf, int frequency) set the frequency and stores it in conf

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

构造器详细资料

SequenceFileInputFilter.PercentFilter

public SequenceFileInputFilter.PercentFilter()

方法详细资料

setFrequency

public static void setFrequency(Configuration conf,
                int frequency)

set the frequency and stores it in conf

参数:

conf - configuration

frequency - filtering frequencey

setConf

public void setConf(Configuration conf)

configure the filter by checking the configuration

参数:

conf - configuration

accept

public boolean accept(Object key)

Filtering method If record# % 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)