/**
* 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.lib.input;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import javax.annotation.Nullable;
import junit.framework.Assert;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.fs.RawLocalFileSystem;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.Job;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
@RunWith(value = Parameterized.class)
public class TestFileInputFormat {
private static final Log LOG = LogFactory.getLog(TestFileInputFormat.class);
private static String testTmpDir = System.getProperty("test.build.data", "/tmp");
private static final Path TEST_ROOT_DIR = new Path(testTmpDir, "TestFIF");
private static FileSystem localFs;
private int numThreads;
public TestFileInputFormat(int numThreads) {
this.numThreads = numThreads;
LOG.info("Running with numThreads: " + numThreads);
}
@Parameters
public static Collection<Object[]> data() {
Object[][] data = new Object[][] { { 1 }, { 5 }};
return Arrays.asList(data);
}
@Before
public void setup() throws IOException {
LOG.info("Using Test Dir: " + TEST_ROOT_DIR);
localFs = FileSystem.getLocal(new Configuration());
localFs.delete(TEST_ROOT_DIR, true);
localFs.mkdirs(TEST_ROOT_DIR);
}
@After
public void cleanup() throws IOException {
localFs.delete(TEST_ROOT_DIR, true);
}
@Test
public void testNumInputFilesRecursively() throws Exception {
Configuration conf = getConfiguration();
conf.set(FileInputFormat.INPUT_DIR_RECURSIVE, "true");
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fileInputFormat = new TextInputFormat();
List<InputSplit> splits = fileInputFormat.getSplits(job);
Assert.assertEquals("Input splits are not correct", 3, splits.size());
verifySplits(Lists.newArrayList("test:/a1/a2/file2", "test:/a1/a2/file3",
"test:/a1/file1"), splits);
// Using the deprecated configuration
conf = getConfiguration();
conf.set("mapred.input.dir.recursive", "true");
job = Job.getInstance(conf);
splits = fileInputFormat.getSplits(job);
verifySplits(Lists.newArrayList("test:/a1/a2/file2", "test:/a1/a2/file3",
"test:/a1/file1"), splits);
}
@Test
public void testNumInputFilesWithoutRecursively() throws Exception {
Configuration conf = getConfiguration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fileInputFormat = new TextInputFormat();
List<InputSplit> splits = fileInputFormat.getSplits(job);
Assert.assertEquals("Input splits are not correct", 2, splits.size());
verifySplits(Lists.newArrayList("test:/a1/a2", "test:/a1/file1"), splits);
}
@Test
public void testListLocatedStatus() throws Exception {
Configuration conf = getConfiguration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
conf.setBoolean("fs.test.impl.disable.cache", false);
conf.set(FileInputFormat.INPUT_DIR, "test:///a1/a2");
MockFileSystem mockFs =
(MockFileSystem) new Path("test:///").getFileSystem(conf);
Assert.assertEquals("listLocatedStatus already called",
0, mockFs.numListLocatedStatusCalls);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fileInputFormat = new TextInputFormat();
List<InputSplit> splits = fileInputFormat.getSplits(job);
Assert.assertEquals("Input splits are not correct", 2, splits.size());
Assert.assertEquals("listLocatedStatuss calls",
1, mockFs.numListLocatedStatusCalls);
FileSystem.closeAll();
}
@Test
public void testListStatusSimple() throws IOException {
Configuration conf = new Configuration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
List<Path> expectedPaths = configureTestSimple(conf, localFs);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fif = new TextInputFormat();
List<FileStatus> statuses = fif.listStatus(job);
verifyFileStatuses(expectedPaths, statuses, localFs);
}
@Test
public void testListStatusNestedRecursive() throws IOException {
Configuration conf = new Configuration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
List<Path> expectedPaths = configureTestNestedRecursive(conf, localFs);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fif = new TextInputFormat();
List<FileStatus> statuses = fif.listStatus(job);
verifyFileStatuses(expectedPaths, statuses, localFs);
}
@Test
public void testListStatusNestedNonRecursive() throws IOException {
Configuration conf = new Configuration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
List<Path> expectedPaths = configureTestNestedNonRecursive(conf, localFs);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fif = new TextInputFormat();
List<FileStatus> statuses = fif.listStatus(job);
verifyFileStatuses(expectedPaths, statuses, localFs);
}
@Test
public void testListStatusErrorOnNonExistantDir() throws IOException {
Configuration conf = new Configuration();
conf.setInt(FileInputFormat.LIST_STATUS_NUM_THREADS, numThreads);
configureTestErrorOnNonExistantDir(conf, localFs);
Job job = Job.getInstance(conf);
FileInputFormat<?, ?> fif = new TextInputFormat();
try {
fif.listStatus(job);
Assert.fail("Expecting an IOException for a missing Input path");
} catch (IOException e) {
Path expectedExceptionPath = new Path(TEST_ROOT_DIR, "input2");
expectedExceptionPath = localFs.makeQualified(expectedExceptionPath);
Assert.assertTrue(e instanceof InvalidInputException);
Assert.assertEquals(
"Input path does not exist: " + expectedExceptionPath.toString(),
e.getMessage());
}
}
public static List<Path> configureTestSimple(Configuration conf, FileSystem localFs)
throws IOException {
Path base1 = new Path(TEST_ROOT_DIR, "input1");
Path base2 = new Path(TEST_ROOT_DIR, "input2");
conf.set(org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR,
localFs.makeQualified(base1) + "," + localFs.makeQualified(base2));
localFs.mkdirs(base1);
localFs.mkdirs(base2);
Path in1File1 = new Path(base1, "file1");
Path in1File2 = new Path(base1, "file2");
localFs.createNewFile(in1File1);
localFs.createNewFile(in1File2);
Path in2File1 = new Path(base2, "file1");
Path in2File2 = new Path(base2, "file2");
localFs.createNewFile(in2File1);
localFs.createNewFile(in2File2);
List<Path> expectedPaths = Lists.newArrayList(in1File1, in1File2, in2File1,
in2File2);
return expectedPaths;
}
public static List<Path> configureTestNestedRecursive(Configuration conf,
FileSystem localFs) throws IOException {
Path base1 = new Path(TEST_ROOT_DIR, "input1");
conf.set(org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR,
localFs.makeQualified(base1).toString());
conf.setBoolean(
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR_RECURSIVE,
true);
localFs.mkdirs(base1);
Path inDir1 = new Path(base1, "dir1");
Path inDir2 = new Path(base1, "dir2");
Path inFile1 = new Path(base1, "file1");
Path dir1File1 = new Path(inDir1, "file1");
Path dir1File2 = new Path(inDir1, "file2");
Path dir2File1 = new Path(inDir2, "file1");
Path dir2File2 = new Path(inDir2, "file2");
localFs.mkdirs(inDir1);
localFs.mkdirs(inDir2);
localFs.createNewFile(inFile1);
localFs.createNewFile(dir1File1);
localFs.createNewFile(dir1File2);
localFs.createNewFile(dir2File1);
localFs.createNewFile(dir2File2);
List<Path> expectedPaths = Lists.newArrayList(inFile1, dir1File1,
dir1File2, dir2File1, dir2File2);
return expectedPaths;
}
public static List<Path> configureTestNestedNonRecursive(Configuration conf,
FileSystem localFs) throws IOException {
Path base1 = new Path(TEST_ROOT_DIR, "input1");
conf.set(org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR,
localFs.makeQualified(base1).toString());
conf.setBoolean(
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR_RECURSIVE,
false);
localFs.mkdirs(base1);
Path inDir1 = new Path(base1, "dir1");
Path inDir2 = new Path(base1, "dir2");
Path inFile1 = new Path(base1, "file1");
Path dir1File1 = new Path(inDir1, "file1");
Path dir1File2 = new Path(inDir1, "file2");
Path dir2File1 = new Path(inDir2, "file1");
Path dir2File2 = new Path(inDir2, "file2");
localFs.mkdirs(inDir1);
localFs.mkdirs(inDir2);
localFs.createNewFile(inFile1);
localFs.createNewFile(dir1File1);
localFs.createNewFile(dir1File2);
localFs.createNewFile(dir2File1);
localFs.createNewFile(dir2File2);
List<Path> expectedPaths = Lists.newArrayList(inFile1, inDir1, inDir2);
return expectedPaths;
}
public static List<Path> configureTestErrorOnNonExistantDir(Configuration conf,
FileSystem localFs) throws IOException {
Path base1 = new Path(TEST_ROOT_DIR, "input1");
Path base2 = new Path(TEST_ROOT_DIR, "input2");
conf.set(org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR,
localFs.makeQualified(base1) + "," + localFs.makeQualified(base2));
conf.setBoolean(
org.apache.hadoop.mapreduce.lib.input.FileInputFormat.INPUT_DIR_RECURSIVE,
true);
localFs.mkdirs(base1);
Path inFile1 = new Path(base1, "file1");
Path inFile2 = new Path(base1, "file2");
localFs.createNewFile(inFile1);
localFs.createNewFile(inFile2);
List<Path> expectedPaths = Lists.newArrayList();
return expectedPaths;
}
public static void verifyFileStatuses(List<Path> expectedPaths,
List<FileStatus> fetchedStatuses, final FileSystem localFs) {
Assert.assertEquals(expectedPaths.size(), fetchedStatuses.size());
Iterable<Path> fqExpectedPaths = Iterables.transform(expectedPaths,
new Function<Path, Path>() {
@Override
public Path apply(Path input) {
return localFs.makeQualified(input);
}
});
Set<Path> expectedPathSet = Sets.newHashSet(fqExpectedPaths);
for (FileStatus fileStatus : fetchedStatuses) {
if (!expectedPathSet.remove(localFs.makeQualified(fileStatus.getPath()))) {
Assert.fail("Found extra fetched status: " + fileStatus.getPath());
}
}
Assert.assertEquals(
"Not all expectedPaths matched: " + expectedPathSet.toString(), 0,
expectedPathSet.size());
}
private void verifySplits(List<String> expected, List<InputSplit> splits) {
Iterable<String> pathsFromSplits = Iterables.transform(splits,
new Function<InputSplit, String>() {
@Override
public String apply(@Nullable InputSplit input) {
return ((FileSplit) input).getPath().toString();
}
});
Set<String> expectedSet = Sets.newHashSet(expected);
for (String splitPathString : pathsFromSplits) {
if (!expectedSet.remove(splitPathString)) {
Assert.fail("Found extra split: " + splitPathString);
}
}
Assert.assertEquals(
"Not all expectedPaths matched: " + expectedSet.toString(), 0,
expectedSet.size());
}
private Configuration getConfiguration() {
Configuration conf = new Configuration();
conf.set("fs.test.impl.disable.cache", "true");
conf.setClass("fs.test.impl", MockFileSystem.class, FileSystem.class);
conf.set(FileInputFormat.INPUT_DIR, "test:///a1");
return conf;
}
static class MockFileSystem extends RawLocalFileSystem {
int numListLocatedStatusCalls = 0;
@Override
public FileStatus[] listStatus(Path f) throws FileNotFoundException,
IOException {
if (f.toString().equals("test:/a1")) {
return new FileStatus[] {
new FileStatus(0, true, 1, 150, 150, new Path("test:/a1/a2")),
new FileStatus(10, false, 1, 150, 150, new Path("test:/a1/file1")) };
} else if (f.toString().equals("test:/a1/a2")) {
return new FileStatus[] {
new FileStatus(10, false, 1, 150, 150,
new Path("test:/a1/a2/file2")),
new FileStatus(10, false, 1, 151, 150,
new Path("test:/a1/a2/file3")) };
}
return new FileStatus[0];
}
@Override
public FileStatus[] globStatus(Path pathPattern, PathFilter filter)
throws IOException {
return new FileStatus[] { new FileStatus(10, true, 1, 150, 150,
pathPattern) };
}
@Override
public FileStatus[] listStatus(Path f, PathFilter filter)
throws FileNotFoundException, IOException {
return this.listStatus(f);
}
@Override
public BlockLocation[] getFileBlockLocations(Path p, long start, long len)
throws IOException {
return new BlockLocation[] {
new BlockLocation(new String[] { "localhost:50010" },
new String[] { "localhost" }, 0, len) };
}
@Override
protected RemoteIterator<LocatedFileStatus> listLocatedStatus(Path f,
PathFilter filter) throws FileNotFoundException, IOException {
++numListLocatedStatusCalls;
return super.listLocatedStatus(f, filter);
}
}
}