@InterfaceAudience.Public @InterfaceStability.Stable public class KeyFieldBasedPartitioner<K2,V2> extends KeyFieldBasedPartitioner<K2,V2> implements Partitioner<K2,V2>
KeyFieldBasedComparator
.
The key specification supported is of the form -k pos1[,pos2], where,
pos is of the form f[.c][opts], where f is the number
of the key field to use, and c is the number of the first character from
the beginning of the field. Fields and character posns are numbered
starting with 1; a character position of zero in pos2 indicates the
field's last character. If '.c' is omitted from pos1, it defaults to 1
(the beginning of the field); if omitted from pos2, it defaults to 0
(the end of the field).PARTITIONER_OPTIONS
Constructor and Description |
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KeyFieldBasedPartitioner() |
Modifier and Type | Method and Description |
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void |
configure(JobConf job)
Initializes a new instance from a
JobConf . |
getConf, getKeyFieldPartitionerOption, getPartition, getPartition, hashCode, setConf, setKeyFieldPartitionerOptions
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getPartition
public void configure(JobConf job)
JobConfigurable
JobConf
.configure
in interface JobConfigurable
job
- the configurationCopyright © 2022 Apache Software Foundation. All rights reserved.