cascading.tap.hadoop.io
Class MultiInputSplit

java.lang.Object
  cascading.tap.hadoop.io.MultiInputSplit

All Implemented Interfaces:

org.apache.hadoop.io.Writable, org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConfigurable

public class MultiInputSplit
extends Object
implements org.apache.hadoop.mapred.InputSplit, org.apache.hadoop.mapred.JobConfigurable

Class MultiInputSplit is used by MultiInputFormat

Field Summary

static String

CASCADING_SOURCE_PATH

Constructor Summary

MultiInputSplit()
This constructor is used internally by Hadoop.

MultiInputSplit(org.apache.hadoop.mapred.InputSplit inputSplit, Map<String,String> config)

Method Summary

void	configure(org.apache.hadoop.mapred.JobConf jobConf)
static String	getCurrentTapSourcePath(org.apache.hadoop.mapred.JobConf jobConf) Method getCurrentTapSourcePath finds and returns the current source Tap filename path, if any.
long	getLength()
String[]	getLocations()
org.apache.hadoop.mapred.InputSplit	getWrappedInputSplit()
void	readFields(DataInput in)
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

CASCADING_SOURCE_PATH

public static final String CASCADING_SOURCE_PATH

See Also:

Constant Field Values

Constructor Detail

MultiInputSplit

public MultiInputSplit(org.apache.hadoop.mapred.InputSplit inputSplit,
                       Map<String,String> config)

MultiInputSplit

public MultiInputSplit()

This constructor is used internally by Hadoop. it is expected configure(org.apache.hadoop.mapred.JobConf) and readFields(java.io.DataInput) are called to properly initialize.

Method Detail

getCurrentTapSourcePath

public static String getCurrentTapSourcePath(org.apache.hadoop.mapred.JobConf jobConf)

Method getCurrentTapSourcePath finds and returns the current source Tap filename path, if any.

Use this method inside an Operation to find the current file being processed.

Parameters:

jobConf -

Returns:

a String

configure

public void configure(org.apache.hadoop.mapred.JobConf jobConf)

Specified by:

configure in interface org.apache.hadoop.mapred.JobConfigurable

getLength

public long getLength()
               throws IOException

Specified by:

getLength in interface org.apache.hadoop.mapred.InputSplit

Throws:

IOException

getLocations

public String[] getLocations()
                      throws IOException

Specified by:

getLocations in interface org.apache.hadoop.mapred.InputSplit

Throws:

IOException

getWrappedInputSplit

public org.apache.hadoop.mapred.InputSplit getWrappedInputSplit()

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException