/**
* 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 static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URI;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FilterFileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PositionedReadable;
import org.apache.hadoop.fs.Seekable;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.filecache.DistributedCache;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
@SuppressWarnings("deprecation")
public class TestLocalDistributedCacheManager {
private static FileSystem mockfs;
public static class MockFileSystem extends FilterFileSystem {
public MockFileSystem() {
super(mockfs);
}
}
private File localDir;
private static void delete(File file) throws IOException {
if (file.getAbsolutePath().length() < 5) {
throw new IllegalArgumentException(
"Path [" + file + "] is too short, not deleting");
}
if (file.exists()) {
if (file.isDirectory()) {
File[] children = file.listFiles();
if (children != null) {
for (File child : children) {
delete(child);
}
}
}
if (!file.delete()) {
throw new RuntimeException(
"Could not delete path [" + file + "]");
}
}
}
@Before
public void setup() throws Exception {
mockfs = mock(FileSystem.class);
localDir = new File(System.getProperty("test.build.dir", "target/test-dir"),
TestLocalDistributedCacheManager.class.getName());
delete(localDir);
localDir.mkdirs();
}
@After
public void cleanup() throws Exception {
delete(localDir);
}
/**
* Mock input stream based on a byte array so that it can be used by a
* FSDataInputStream.
*/
private static class MockInputStream extends ByteArrayInputStream
implements Seekable, PositionedReadable {
public MockInputStream(byte[] buf) {
super(buf);
}
// empty implementation for unused methods
public int read(long position, byte[] buffer, int offset, int length) { return -1; }
public void readFully(long position, byte[] buffer, int offset, int length) {}
public void readFully(long position, byte[] buffer) {}
public void seek(long position) {}
public long getPos() { return 0; }
public boolean seekToNewSource(long targetPos) { return false; }
}
@Test
public void testDownload() throws Exception {
JobConf conf = new JobConf();
conf.setClass("fs.mock.impl", MockFileSystem.class, FileSystem.class);
URI mockBase = new URI("mock://test-nn1/");
when(mockfs.getUri()).thenReturn(mockBase);
Path working = new Path("mock://test-nn1/user/me/");
when(mockfs.getWorkingDirectory()).thenReturn(working);
when(mockfs.resolvePath(any(Path.class))).thenAnswer(new Answer<Path>() {
@Override
public Path answer(InvocationOnMock args) throws Throwable {
return (Path) args.getArguments()[0];
}
});
final URI file = new URI("mock://test-nn1/user/me/file.txt#link");
final Path filePath = new Path(file);
File link = new File("link");
when(mockfs.getFileStatus(any(Path.class))).thenAnswer(new Answer<FileStatus>() {
@Override
public FileStatus answer(InvocationOnMock args) throws Throwable {
Path p = (Path)args.getArguments()[0];
if("file.txt".equals(p.getName())) {
return new FileStatus(201, false, 1, 500, 101, 101,
FsPermission.getDefault(), "me", "me", filePath);
} else {
throw new FileNotFoundException(p+" not supported by mocking");
}
}
});
when(mockfs.getConf()).thenReturn(conf);
final FSDataInputStream in =
new FSDataInputStream(new MockInputStream("This is a test file\n".getBytes()));
when(mockfs.open(any(Path.class), anyInt())).thenAnswer(new Answer<FSDataInputStream>() {
@Override
public FSDataInputStream answer(InvocationOnMock args) throws Throwable {
Path src = (Path)args.getArguments()[0];
if ("file.txt".equals(src.getName())) {
return in;
} else {
throw new FileNotFoundException(src+" not supported by mocking");
}
}
});
DistributedCache.addCacheFile(file, conf);
conf.set(MRJobConfig.CACHE_FILE_TIMESTAMPS, "101");
conf.set(MRJobConfig.CACHE_FILES_SIZES, "201");
conf.set(MRJobConfig.CACHE_FILE_VISIBILITIES, "false");
conf.set(MRConfig.LOCAL_DIR, localDir.getAbsolutePath());
LocalDistributedCacheManager manager = new LocalDistributedCacheManager();
try {
manager.setup(conf);
assertTrue(link.exists());
} finally {
manager.close();
}
assertFalse(link.exists());
}
@Test
public void testEmptyDownload() throws Exception {
JobConf conf = new JobConf();
conf.setClass("fs.mock.impl", MockFileSystem.class, FileSystem.class);
URI mockBase = new URI("mock://test-nn1/");
when(mockfs.getUri()).thenReturn(mockBase);
Path working = new Path("mock://test-nn1/user/me/");
when(mockfs.getWorkingDirectory()).thenReturn(working);
when(mockfs.resolvePath(any(Path.class))).thenAnswer(new Answer<Path>() {
@Override
public Path answer(InvocationOnMock args) throws Throwable {
return (Path) args.getArguments()[0];
}
});
when(mockfs.getFileStatus(any(Path.class))).thenAnswer(new Answer<FileStatus>() {
@Override
public FileStatus answer(InvocationOnMock args) throws Throwable {
Path p = (Path)args.getArguments()[0];
throw new FileNotFoundException(p+" not supported by mocking");
}
});
when(mockfs.getConf()).thenReturn(conf);
when(mockfs.open(any(Path.class), anyInt())).thenAnswer(new Answer<FSDataInputStream>() {
@Override
public FSDataInputStream answer(InvocationOnMock args) throws Throwable {
Path src = (Path)args.getArguments()[0];
throw new FileNotFoundException(src+" not supported by mocking");
}
});
conf.set(MRJobConfig.CACHE_FILES, "");
conf.set(MRConfig.LOCAL_DIR, localDir.getAbsolutePath());
LocalDistributedCacheManager manager = new LocalDistributedCacheManager();
try {
manager.setup(conf);
} finally {
manager.close();
}
}
@Test
public void testDuplicateDownload() throws Exception {
JobConf conf = new JobConf();
conf.setClass("fs.mock.impl", MockFileSystem.class, FileSystem.class);
URI mockBase = new URI("mock://test-nn1/");
when(mockfs.getUri()).thenReturn(mockBase);
Path working = new Path("mock://test-nn1/user/me/");
when(mockfs.getWorkingDirectory()).thenReturn(working);
when(mockfs.resolvePath(any(Path.class))).thenAnswer(new Answer<Path>() {
@Override
public Path answer(InvocationOnMock args) throws Throwable {
return (Path) args.getArguments()[0];
}
});
final URI file = new URI("mock://test-nn1/user/me/file.txt#link");
final Path filePath = new Path(file);
File link = new File("link");
when(mockfs.getFileStatus(any(Path.class))).thenAnswer(new Answer<FileStatus>() {
@Override
public FileStatus answer(InvocationOnMock args) throws Throwable {
Path p = (Path)args.getArguments()[0];
if("file.txt".equals(p.getName())) {
return new FileStatus(201, false, 1, 500, 101, 101,
FsPermission.getDefault(), "me", "me", filePath);
} else {
throw new FileNotFoundException(p+" not supported by mocking");
}
}
});
when(mockfs.getConf()).thenReturn(conf);
final FSDataInputStream in =
new FSDataInputStream(new MockInputStream("This is a test file\n".getBytes()));
when(mockfs.open(any(Path.class), anyInt())).thenAnswer(new Answer<FSDataInputStream>() {
@Override
public FSDataInputStream answer(InvocationOnMock args) throws Throwable {
Path src = (Path)args.getArguments()[0];
if ("file.txt".equals(src.getName())) {
return in;
} else {
throw new FileNotFoundException(src+" not supported by mocking");
}
}
});
DistributedCache.addCacheFile(file, conf);
DistributedCache.addCacheFile(file, conf);
conf.set(MRJobConfig.CACHE_FILE_TIMESTAMPS, "101,101");
conf.set(MRJobConfig.CACHE_FILES_SIZES, "201,201");
conf.set(MRJobConfig.CACHE_FILE_VISIBILITIES, "false,false");
conf.set(MRConfig.LOCAL_DIR, localDir.getAbsolutePath());
LocalDistributedCacheManager manager = new LocalDistributedCacheManager();
try {
manager.setup(conf);
assertTrue(link.exists());
} finally {
manager.close();
}
assertFalse(link.exists());
}
}