org.apache.pig.backend.hadoop.executionengine.mapReduceLayer

Class FileBasedOutputSizeReader

java.lang.Object

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.FileBasedOutputSizeReader

All Implemented Interfaces:

PigStatsOutputSizeReader

public class FileBasedOutputSizeReader
extends Object
implements PigStatsOutputSizeReader

Class that computes the size of output for file-based systems.

Field Summary

Fields inherited from interface org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigStatsOutputSizeReader

OUTPUT_SIZE_READER_KEY, OUTPUT_SIZE_READER_UNSUPPORTED

Constructor Summary

Constructors

Constructor and Description
FileBasedOutputSizeReader()

Method Summary

Modifier and Type	Method and Description
long	getOutputSize(POStore sto, org.apache.hadoop.conf.Configuration conf) Returns the total size of output files in bytes
boolean	supports(POStore sto, org.apache.hadoop.conf.Configuration conf) Returns whether the given POStore is supported by this output size reader or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileBasedOutputSizeReader

public FileBasedOutputSizeReader()

Method Detail

supports

public boolean supports(POStore sto,
                        org.apache.hadoop.conf.Configuration conf)

Returns whether the given POStore is supported by this output size reader or not. We check whether the uri scheme of output file is one of hdfs, local, and s3.

Specified by:

supports in interface PigStatsOutputSizeReader

Parameters:

sto - POStore

conf - Configuration

getOutputSize

public long getOutputSize(POStore sto,
                          org.apache.hadoop.conf.Configuration conf)
                   throws IOException

Returns the total size of output files in bytes

Specified by:

getOutputSize in interface PigStatsOutputSizeReader

Parameters:

sto - POStore

conf - configuration

Throws:

IOException