[120] | 1 | /** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
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| 3 | * or more contributor license agreements. See the NOTICE file |
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| 4 | * distributed with this work for additional information |
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| 5 | * regarding copyright ownership. The ASF licenses this file |
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| 6 | * to you under the Apache License, Version 2.0 (the |
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| 7 | * "License"); you may not use this file except in compliance |
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| 8 | * with the License. You may obtain a copy of the License at |
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| 9 | * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 | * |
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| 12 | * Unless required by applicable law or agreed to in writing, software |
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| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 15 | * See the License for the specific language governing permissions and |
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| 16 | * limitations under the License. |
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| 17 | */ |
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| 18 | |
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| 19 | package org.apache.hadoop.mapreduce.lib.input; |
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| 20 | |
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| 21 | import java.io.IOException; |
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| 22 | import java.util.List; |
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| 23 | |
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| 24 | import org.apache.hadoop.fs.FileStatus; |
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| 25 | import org.apache.hadoop.fs.FileSystem; |
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| 26 | import org.apache.hadoop.fs.Path; |
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| 27 | |
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| 28 | import org.apache.hadoop.io.SequenceFile; |
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| 29 | import org.apache.hadoop.io.MapFile; |
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| 30 | import org.apache.hadoop.mapreduce.InputFormat; |
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| 31 | import org.apache.hadoop.mapreduce.InputSplit; |
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| 32 | import org.apache.hadoop.mapreduce.JobContext; |
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| 33 | import org.apache.hadoop.mapreduce.RecordReader; |
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| 34 | import org.apache.hadoop.mapreduce.TaskAttemptContext; |
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| 35 | |
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| 36 | /** An {@link InputFormat} for {@link SequenceFile}s. */ |
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| 37 | public class SequenceFileInputFormat<K, V> extends FileInputFormat<K, V> { |
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| 38 | |
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| 39 | @Override |
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| 40 | public RecordReader<K, V> createRecordReader(InputSplit split, |
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| 41 | TaskAttemptContext context |
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| 42 | ) throws IOException { |
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| 43 | return new SequenceFileRecordReader<K,V>(); |
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| 44 | } |
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| 45 | |
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| 46 | @Override |
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| 47 | protected long getFormatMinSplitSize() { |
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| 48 | return SequenceFile.SYNC_INTERVAL; |
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| 49 | } |
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| 50 | |
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| 51 | @Override |
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| 52 | protected List<FileStatus> listStatus(JobContext job |
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| 53 | )throws IOException { |
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| 54 | |
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| 55 | List<FileStatus> files = super.listStatus(job); |
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| 56 | int len = files.size(); |
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| 57 | for(int i=0; i < len; ++i) { |
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| 58 | FileStatus file = files.get(i); |
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| 59 | if (file.isDir()) { // it's a MapFile |
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| 60 | Path p = file.getPath(); |
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| 61 | FileSystem fs = p.getFileSystem(job.getConfiguration()); |
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| 62 | // use the data file |
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| 63 | files.set(i, fs.getFileStatus(new Path(p, MapFile.DATA_FILE_NAME))); |
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| 64 | } |
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| 65 | } |
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| 66 | return files; |
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| 67 | } |
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| 68 | } |
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| 69 | |
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