org.apache.hadoop.mapreduce.lib.db

Class DataDrivenDBInputFormat.DataDrivenDBInputSplit

java.lang.Object

org.apache.hadoop.mapreduce.InputSplit

org.apache.hadoop.mapreduce.lib.db.DBInputFormat.DBInputSplit

org.apache.hadoop.mapreduce.lib.db.DataDrivenDBInputFormat.DataDrivenDBInputSplit

All Implemented Interfaces:

org.apache.hadoop.io.Writable

Enclosing class:

DataDrivenDBInputFormat<T extends DBWritable>

@InterfaceStability.Evolving
public static class DataDrivenDBInputFormat.DataDrivenDBInputSplit
extends DBInputFormat.DBInputSplit

A InputSplit that spans a set of rows

Constructor Summary

Constructors

Constructor and Description
DataDrivenDBInputFormat.DataDrivenDBInputSplit() Default Constructor
DataDrivenDBInputFormat.DataDrivenDBInputSplit(String lower, String upper) Convenience Constructor

Method Summary

Methods

Modifier and Type	Method and Description
long	getLength() Get the size of the split, so that the input splits can be sorted by size.
String	getLowerClause()
String	getUpperClause()
void	readFields(DataInput input)
void	write(DataOutput output)

Methods inherited from class org.apache.hadoop.mapreduce.lib.db.DBInputFormat.DBInputSplit

getEnd, getLocations, getStart

Methods inherited from class org.apache.hadoop.mapreduce.InputSplit

getLocationInfo

Methods inherited from class java.lang.Object

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

Constructor Detail

DataDrivenDBInputFormat.DataDrivenDBInputSplit

public DataDrivenDBInputFormat.DataDrivenDBInputSplit()

Default Constructor

DataDrivenDBInputFormat.DataDrivenDBInputSplit

public DataDrivenDBInputFormat.DataDrivenDBInputSplit(String lower,
                                              String upper)

Convenience Constructor

Parameters:

lower - the string to be put in the WHERE clause to guard on the 'lower' end

upper - the string to be put in the WHERE clause to guard on the 'upper' end

Method Detail

getLength

public long getLength()
               throws IOException

Description copied from class: InputSplit

Get the size of the split, so that the input splits can be sorted by size.

Overrides:

getLength in class DBInputFormat.DBInputSplit

Returns:

The total row count in this split

Throws:

IOException

readFields

public void readFields(DataInput input)
                throws IOException

Specified by:

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

Overrides:

readFields in class DBInputFormat.DBInputSplit

Throws:

IOException

write

public void write(DataOutput output)
           throws IOException

Specified by:

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

Overrides:

write in class DBInputFormat.DBInputSplit

Throws:

IOException

getLowerClause

public String getLowerClause()

getUpperClause

public String getUpperClause()