GenericMR (Hive 1.2.2 API)

```
public final class GenericMR
extends Object
```
This class attempts to provide a simple framework for writing Hive map/reduce tasks in java. The main benefit is that it deals with grouping the keys together for reduce tasks. Additionally, it deals with all system io... and provides something closer to the hadoop m/r. As an example, here's the wordcount reduce: new GenericMR().reduce(System.in, System.out, new Reducer() { public void reduce(String key, Iterator records, Output output) throws Exception { int count = 0; while (records.hasNext()) { count += Integer.parseInt(records.next()[1]); } output.collect(new String[] { key, String.valueOf(count) }); }});

Constructors
Constructor and Description
`GenericMR()`

Methods
Modifier and Type	Method and Description
`void`	`map(InputStream in, OutputStream out, Mapper mapper)`
`void`	`map(Reader in, Writer out, Mapper mapper)`
`void`	`reduce(InputStream in, OutputStream out, Reducer reducer)`
`void`	`reduce(Reader in, Writer out, Reducer reducer)`

public void map(InputStream in,
       OutputStream out,
       Mapper mapper)
         throws Exception

public void map(Reader in,
       Writer out,
       Mapper mapper)
         throws Exception

public void reduce(InputStream in,
          OutputStream out,
          Reducer reducer)
            throws Exception

public void reduce(Reader in,
          Writer out,
          Reducer reducer)
            throws Exception

Class GenericMR