| /** |
| * 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.mapred; |
| |
| import java.io.*; |
| import java.util.*; |
| import junit.framework.TestCase; |
| |
| import org.apache.commons.logging.*; |
| |
| import org.apache.hadoop.fs.*; |
| import org.apache.hadoop.io.*; |
| import org.apache.hadoop.conf.*; |
| |
| public class TestSequenceFileAsTextInputFormat extends TestCase { |
| private static final Log LOG = InputFormatBase.LOG; |
| |
| private static int MAX_LENGTH = 10000; |
| private static Configuration conf = new Configuration(); |
| |
| public void testFormat() throws Exception { |
| JobConf job = new JobConf(conf); |
| FileSystem fs = FileSystem.getLocal(conf); |
| Path dir = new Path(System.getProperty("test.build.data",".") + "/mapred"); |
| Path file = new Path(dir, "test.seq"); |
| |
| Reporter reporter = Reporter.NULL; |
| |
| int seed = new Random().nextInt(); |
| //LOG.info("seed = "+seed); |
| Random random = new Random(seed); |
| |
| fs.delete(dir); |
| |
| job.setInputPath(dir); |
| |
| // for a variety of lengths |
| for (int length = 0; length < MAX_LENGTH; |
| length+= random.nextInt(MAX_LENGTH/10)+1) { |
| |
| //LOG.info("creating; entries = " + length); |
| |
| // create a file with length entries |
| SequenceFile.Writer writer = |
| SequenceFile.createWriter(fs, conf, file, |
| IntWritable.class, LongWritable.class); |
| try { |
| for (int i = 0; i < length; i++) { |
| IntWritable key = new IntWritable(i); |
| LongWritable value = new LongWritable(10 * i); |
| writer.append(key, value); |
| } |
| } finally { |
| writer.close(); |
| } |
| |
| // try splitting the file in a variety of sizes |
| InputFormat format = new SequenceFileAsTextInputFormat(); |
| |
| for (int i = 0; i < 3; i++) { |
| int numSplits = |
| random.nextInt(MAX_LENGTH/(SequenceFile.SYNC_INTERVAL/20))+1; |
| //LOG.info("splitting: requesting = " + numSplits); |
| InputSplit[] splits = format.getSplits(job, numSplits); |
| //LOG.info("splitting: got = " + splits.length); |
| |
| // check each split |
| BitSet bits = new BitSet(length); |
| for (int j = 0; j < splits.length; j++) { |
| RecordReader reader = |
| format.getRecordReader(splits[j], job, reporter); |
| Class readerClass = reader.getClass(); |
| assertEquals("reader class is SequenceFileAsTextRecordReader.", SequenceFileAsTextRecordReader.class, readerClass); |
| Text value = (Text)reader.createValue(); |
| Text key = (Text)reader.createKey(); |
| try { |
| int count = 0; |
| while (reader.next(key, value)) { |
| // if (bits.get(key.get())) { |
| // LOG.info("splits["+j+"]="+splits[j]+" : " + key.get()); |
| // LOG.info("@"+reader.getPos()); |
| // } |
| int keyInt = Integer.parseInt(key.toString()); |
| assertFalse("Key in multiple partitions.", bits.get(keyInt)); |
| bits.set(keyInt); |
| count++; |
| } |
| //LOG.info("splits["+j+"]="+splits[j]+" count=" + count); |
| } finally { |
| reader.close(); |
| } |
| } |
| assertEquals("Some keys in no partition.", length, bits.cardinality()); |
| } |
| |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new TestSequenceFileAsTextInputFormat().testFormat(); |
| } |
| } |