/**
* 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.record.test;
import java.io.*;
import java.util.*;
import junit.framework.TestCase;
import org.apache.hadoop.fs.*;
import org.apache.hadoop.io.*;
import org.apache.hadoop.conf.*;
import org.apache.commons.logging.*;
import org.apache.hadoop.mapred.FileSplit;
import org.apache.hadoop.mapred.InputFormat;
import org.apache.hadoop.mapred.InputFormatBase;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.SequenceFileInputFormat;
public class TestWritable 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.getNamed("local", conf);
Path dir = new Path(System.getProperty("test.build.data",".") + "/mapred");
Path file = new Path(dir, "test.seq");
Reporter reporter = new Reporter() {
public void setStatus(String status) throws IOException {}
public void progress() throws IOException {}
};
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 =
new SequenceFile.Writer(fs, conf, file,
RecInt.class, RecBuffer.class);
try {
for (int i = 0; i < length; i++) {
RecInt key = new RecInt();
key.setData(i);
byte[] data = new byte[random.nextInt(10)];
random.nextBytes(data);
RecBuffer value = new RecBuffer();
ByteArrayOutputStream strm = new ByteArrayOutputStream(data.length);
strm.write(data);
value.setData(strm);
writer.append(key, value);
}
} finally {
writer.close();
}
// try splitting the file in a variety of sizes
InputFormat format = new SequenceFileInputFormat();
RecInt key = new RecInt();
RecBuffer value = new RecBuffer();
for (int i = 0; i < 3; i++) {
int numSplits =
random.nextInt(MAX_LENGTH/(SequenceFile.SYNC_INTERVAL/20))+1;
//LOG.info("splitting: requesting = " + numSplits);
FileSplit[] splits = format.getSplits(fs, 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(fs, splits[j], job, reporter);
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());
// }
assertFalse("Key in multiple partitions.", bits.get(key.getData()));
bits.set(key.getData());
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 TestWritable().testFormat();
}
}