/**
* 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.IOException;
import java.io.OutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.mapred.lib.CombineFileInputFormat;
import org.apache.hadoop.mapred.lib.CombineFileSplit;
import org.apache.hadoop.mapred.lib.CombineFileRecordReader;
import org.junit.Test;
import static junit.framework.Assert.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class TestCombineFileInputFormat {
private static final Log LOG =
LogFactory.getLog(TestCombineFileInputFormat.class.getName());
private static JobConf defaultConf = new JobConf();
private static FileSystem localFs = null;
static {
try {
defaultConf.set("fs.defaultFS", "file:///");
localFs = FileSystem.getLocal(defaultConf);
} catch (IOException e) {
throw new RuntimeException("init failure", e);
}
}
private static Path workDir =
new Path(new Path(System.getProperty("test.build.data", "/tmp")),
"TestCombineFileInputFormat").makeQualified(localFs);
private static void writeFile(FileSystem fs, Path name,
String contents) throws IOException {
OutputStream stm;
stm = fs.create(name);
stm.write(contents.getBytes());
stm.close();
}
/**
* Test getSplits
*/
@Test
@SuppressWarnings("unchecked")
public void testSplits() throws IOException {
JobConf job = new JobConf(defaultConf);
localFs.delete(workDir, true);
writeFile(localFs, new Path(workDir, "test.txt"),
"the quick\nbrown\nfox jumped\nover\n the lazy\n dog\n");
FileInputFormat.setInputPaths(job, workDir);
CombineFileInputFormat format = new CombineFileInputFormat() {
@Override
public RecordReader getRecordReader(InputSplit split, JobConf job, Reporter reporter) throws IOException {
return new CombineFileRecordReader(job, (CombineFileSplit)split, reporter, CombineFileRecordReader.class);
}
};
final int SIZE_SPLITS = 1;
LOG.info("Trying to getSplits with splits = " + SIZE_SPLITS);
InputSplit[] splits = format.getSplits(job, SIZE_SPLITS);
LOG.info("Got getSplits = " + splits.length);
assertEquals("splits == " + SIZE_SPLITS, SIZE_SPLITS, splits.length);
}
}