UniqueKeyOnlyReducer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package io.covert.util;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

public class UniqueKeyOnlyReducer<K1, V1> extends Reducer<K1, V1, K1, org.apache.hadoop.io.Text> {

	Text value = new Text("");
	
	protected void reduce(K1 key, Iterable<V1> ignored, Context context) throws java.io.IOException, InterruptedException 
	{
		context.write(key, value);
	}
}