| /** |
| * 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.hdfs; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.EnumSet; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.impl.Log4JLogger; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.CreateFlag; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.LocatedFileStatus; |
| import org.apache.hadoop.fs.Options; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.RemoteIterator; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.log4j.Level; |
| import org.junit.After; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| /** |
| * This class tests the FileStatus API. |
| */ |
| public class TestListFilesInFileContext { |
| { |
| ((Log4JLogger)FileSystem.LOG).getLogger().setLevel(Level.ALL); |
| } |
| |
| static final long seed = 0xDEADBEEFL; |
| |
| final private static Configuration conf = new Configuration(); |
| private static MiniDFSCluster cluster; |
| private static FileContext fc; |
| final private static Path TEST_DIR = new Path("/main_"); |
| final private static int FILE_LEN = 10; |
| final private static Path FILE1 = new Path(TEST_DIR, "file1"); |
| final private static Path DIR1 = new Path(TEST_DIR, "dir1"); |
| final private static Path FILE2 = new Path(DIR1, "file2"); |
| final private static Path FILE3 = new Path(DIR1, "file3"); |
| |
| @BeforeClass |
| public static void testSetUp() throws Exception { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| fc = FileContext.getFileContext(cluster.getConfiguration(0)); |
| fc.delete(TEST_DIR, true); |
| } |
| |
| private static void writeFile(FileContext fc, Path name, int fileSize) |
| throws IOException { |
| // Create and write a file that contains three blocks of data |
| FSDataOutputStream stm = fc.create(name, EnumSet.of(CreateFlag.CREATE), |
| Options.CreateOpts.createParent()); |
| byte[] buffer = new byte[fileSize]; |
| Random rand = new Random(seed); |
| rand.nextBytes(buffer); |
| stm.write(buffer); |
| stm.close(); |
| } |
| |
| @AfterClass |
| public static void testShutdown() throws Exception { |
| cluster.shutdown(); |
| } |
| |
| /** Test when input path is a file */ |
| @Test |
| public void testFile() throws IOException { |
| fc.mkdir(TEST_DIR, FsPermission.getDefault(), true); |
| writeFile(fc, FILE1, FILE_LEN); |
| |
| RemoteIterator<LocatedFileStatus> itor = fc.util().listFiles( |
| FILE1, true); |
| LocatedFileStatus stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| itor = fc.util().listFiles(FILE1, false); |
| stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| } |
| |
| @After |
| public void cleanDir() throws IOException { |
| fc.delete(TEST_DIR, true); |
| } |
| |
| /** Test when input path is a directory */ |
| @Test |
| public void testDirectory() throws IOException { |
| fc.mkdir(DIR1, FsPermission.getDefault(), true); |
| |
| // test empty directory |
| RemoteIterator<LocatedFileStatus> itor = fc.util().listFiles( |
| DIR1, true); |
| assertFalse(itor.hasNext()); |
| itor = fc.util().listFiles(DIR1, false); |
| assertFalse(itor.hasNext()); |
| |
| // testing directory with 1 file |
| writeFile(fc, FILE2, FILE_LEN); |
| |
| itor = fc.util().listFiles(DIR1, true); |
| LocatedFileStatus stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fc.makeQualified(FILE2), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| itor = fc.util().listFiles(DIR1, false); |
| stat = itor.next(); |
| assertFalse(itor.hasNext()); |
| assertTrue(stat.isFile()); |
| assertEquals(FILE_LEN, stat.getLen()); |
| assertEquals(fc.makeQualified(FILE2), stat.getPath()); |
| assertEquals(1, stat.getBlockLocations().length); |
| |
| // test more complicated directory |
| writeFile(fc, FILE1, FILE_LEN); |
| writeFile(fc, FILE3, FILE_LEN); |
| |
| itor = fc.util().listFiles(TEST_DIR, true); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE2), stat.getPath()); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE3), stat.getPath()); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertFalse(itor.hasNext()); |
| |
| itor = fc.util().listFiles(TEST_DIR, false); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertFalse(itor.hasNext()); |
| } |
| |
| /** Test when input patch has a symbolic links as its children */ |
| @Test |
| public void testSymbolicLinks() throws IOException { |
| writeFile(fc, FILE1, FILE_LEN); |
| writeFile(fc, FILE2, FILE_LEN); |
| writeFile(fc, FILE3, FILE_LEN); |
| |
| Path dir4 = new Path(TEST_DIR, "dir4"); |
| Path dir5 = new Path(dir4, "dir5"); |
| Path file4 = new Path(dir4, "file4"); |
| |
| fc.createSymlink(DIR1, dir5, true); |
| fc.createSymlink(FILE1, file4, true); |
| |
| RemoteIterator<LocatedFileStatus> itor = fc.util().listFiles(dir4, true); |
| LocatedFileStatus stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE2), stat.getPath()); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE3), stat.getPath()); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertFalse(itor.hasNext()); |
| |
| itor = fc.util().listFiles(dir4, false); |
| stat = itor.next(); |
| assertTrue(stat.isFile()); |
| assertEquals(fc.makeQualified(FILE1), stat.getPath()); |
| assertFalse(itor.hasNext()); |
| } |
| } |