按mapreduce排序

Question

I am learning hadoop mapreducing. I am trying to sort (by value) using mapreduce. Below is my code for the mapper:

static String splitChar = "\t";
static int colIndexone = 0;
static int colIndextwo = 1;

public static class MapClass extends MapReduceBase implements
    Mapper<Object, Text, IntWritable, Text> {
public void map(Object key, Text value,
        OutputCollector<IntWritable, Text> collector, Reporter arg3)
        throws IOException {
    int number;
    String word = "empty";
    String row = value.toString();
    String colVals[] = row.split(splitChar);        
    word = colVals[colIndexone].toString();
    number = Integer.parseInt(colVals[colIndextwo]);

    collector.collect(new IntWritable(number), new Text(word));
}

}

Here I am reversing the pair so that, in the reducer I can sort based on the values. I followed this .

Now, can anyone help me how to approach for the reducer code!

Thanks in advance.

UPDATE :

I wrote this as reducer

public static class Reduce extends MapReduceBase implements
    Reducer<IntWritable, Text, IntWritable, Text> {
public void reduce(IntWritable key, Iterator<Text> values,
        OutputCollector<IntWritable, Text> arg2, Reporter arg3)
        throws IOException {
}
} 

But how to get the sorted values?

Answer 1

Solved:

Below code is added to the reducer

while(values.hasNext()){
        arg2.collect(key, (Text) values.next());
    }