1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 package org.apache.giraph.bsp; 20 21 import java.io.IOException; 22 23 import org.apache.hadoop.io.Text; 24 import org.apache.hadoop.mapreduce.RecordWriter; 25 import org.apache.hadoop.mapreduce.TaskAttemptContext; 26 27 /** 28 * Used by {@link BspOutputFormat} since some versions of Hadoop 29 * require that a RecordWriter is returned from getRecordWriter. 30 * Does nothing, except insures that write is never called. 31 */ 32 public class BspRecordWriter extends RecordWriter<Text, Text> { 33 34 @Override 35 public void close(TaskAttemptContext context) 36 throws IOException, InterruptedException { 37 // Do nothing 38 } 39 40 @Override 41 public void write(Text key, Text value) 42 throws IOException, InterruptedException { 43 throw new IOException("write: Cannot write with " + 44 getClass().getName() + 45 ". Should never be called"); 46 } 47 }