/**
* Copyright 2016 ZuInnoTe (Jörn Franke) <zuinnote@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/


/**
 * Simple Reducer for summarizing counts by the mapper
 */
package org.zuinnote.hadoop.bitcoin.example.tasks;

/**
* Author: Jörn Franke <zuinnote@gmail.com>
*
*/
import java.io.IOException;
import org.apache.hadoop.mapreduce.*;
import org.apache.hadoop.io.*;
import java.util.*;

public class BitcoinTransactionReducer extends Reducer<Text, IntWritable, Text, LongWritable> {

private LongWritable result= new LongWritable();

@Override
public void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
       long sum = 0;
       for (IntWritable val: values) {
           sum += val.get();
       }
	result.set(sum);
       context.write(key, result);
 }
}


