SecondarySort (Apache Hadoop MapReduce Examples 3.4.1.200-dep-1000 API)

```
public class SecondarySort
extends java.lang.Object
```
This is an example Hadoop Map/Reduce application. It reads the text input files that must contain two integers per a line. The output is sorted by the first and second number and grouped on the first number. To run: bin/hadoop jar build/hadoop-examples.jar secondarysort in-dir out-dir

Nested Classes
Modifier and Type	Class	Description
`static class`	`SecondarySort.FirstGroupingComparator`	Compare only the first part of the pair, so that reduce is called once for each value of the first part.
`static class`	`SecondarySort.FirstPartitioner`	Partition based on the first part of the pair.
`static class`	`SecondarySort.IntPair`	Define a pair of integers that are writable.
`static class`	`SecondarySort.MapClass`	Read two integers from each line and generate a key, value pair as ((left, right), right).
`static class`	`SecondarySort.Reduce`	A reducer class that just emits the sum of the input values.

Constructors
Constructor	Description
`SecondarySort()`

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`main(java.lang.String[] args)`

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Class SecondarySort