| /** |
| * 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 org.apache.hadoop.mapreduce; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.RecordReader; |
| |
| /** |
| * <code>InputSplit</code> represents the data to be processed by an |
| * individual {@link Mapper}. |
| * |
| * <p>Typically, it presents a byte-oriented view on the input and is the |
| * responsibility of {@link RecordReader} of the job to process this and present |
| * a record-oriented view. |
| * |
| * @see InputFormat |
| * @see RecordReader |
| */ |
| public abstract class InputSplit { |
| /** |
| * Get the size of the split, so that the input splits can be sorted by size. |
| * @return the number of bytes in the split |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| public abstract long getLength() throws IOException, InterruptedException; |
| |
| /** |
| * Get the list of nodes by name where the data for the split would be local. |
| * The locations do not need to be serialized. |
| * @return a new array of the node nodes. |
| * @throws IOException |
| * @throws InterruptedException |
| */ |
| public abstract |
| String[] getLocations() throws IOException, InterruptedException; |
| } |