/**
* 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.assertTrue;
import static org.junit.Assert.fail;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Random;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.log4j.Level;
import org.junit.Test;
/**
* This class tests the FileStatus API.
*/
public class TestFileStatus {
{
((Log4JLogger)FSNamesystem.LOG).getLogger().setLevel(Level.ALL);
((Log4JLogger)FileSystem.LOG).getLogger().setLevel(Level.ALL);
}
static final long seed = 0xDEADBEEFL;
static final int blockSize = 8192;
static final int fileSize = 16384;
private void writeFile(FileSystem fileSys, Path name, int repl,
int fileSize, int blockSize)
throws IOException {
// create and write a file that contains three blocks of data
FSDataOutputStream stm = fileSys.create(name, true,
fileSys.getConf().getInt("io.file.buffer.size", 4096),
(short)repl, (long)blockSize);
byte[] buffer = new byte[fileSize];
Random rand = new Random(seed);
rand.nextBytes(buffer);
stm.write(buffer);
stm.close();
}
private void checkFile(FileSystem fileSys, Path name, int repl)
throws IOException {
DFSTestUtil.waitReplication(fileSys, name, (short) repl);
}
/**
* Tests various options of DFSShell.
*/
@Test
public void testFileStatus() throws Exception {
Configuration conf = new Configuration();
conf.setInt(DFSConfigKeys.DFS_LIST_LIMIT, 2);
MiniDFSCluster cluster = new MiniDFSCluster(conf, 1, true, null);
FileSystem fs = cluster.getFileSystem();
final HftpFileSystem hftpfs = cluster.getHftpFileSystem();
final DFSClient dfsClient = new DFSClient(NameNode.getAddress(conf), conf);
try {
//
// check that / exists
//
Path path = new Path("/");
System.out.println("Path : \"" + path.toString() + "\"");
assertTrue("/ should be a directory",
fs.getFileStatus(path).isDir() == true);
// make sure getFileInfo returns null for files which do not exist
HdfsFileStatus fileInfo = dfsClient.getFileInfo("/noSuchFile");
assertTrue(fileInfo == null);
// create a file in home directory
//
Path file1 = new Path("filestatus.dat");
writeFile(fs, file1, 1, fileSize, blockSize);
System.out.println("Created file filestatus.dat with one "
+ " replicas.");
checkFile(fs, file1, 1);
System.out.println("Path : \"" + file1 + "\"");
// test getFileStatus on a file
FileStatus status = fs.getFileStatus(file1);
assertTrue(file1 + " should be a file",
status.isDir() == false);
assertTrue(status.getBlockSize() == blockSize);
assertTrue(status.getReplication() == 1);
assertTrue(status.getLen() == fileSize);
assertEquals(fs.makeQualified(file1).toString(),
status.getPath().toString());
// test getVisbileLen
DFSDataInputStream fin = (DFSDataInputStream)fs.open(file1);
assertEquals(status.getLen(), fin.getVisibleLength());
// test listStatus on a file
FileStatus[] stats = fs.listStatus(file1);
assertEquals(1, stats.length);
status = stats[0];
assertTrue(file1 + " should be a file",
status.isDir() == false);
assertTrue(status.getBlockSize() == blockSize);
assertTrue(status.getReplication() == 1);
assertTrue(status.getLen() == fileSize);
assertEquals(fs.makeQualified(file1).toString(),
status.getPath().toString());
// test file status on a directory
Path dir = new Path("/test/mkdirs");
// test listStatus on a non-existent file/directory
stats = fs.listStatus(dir);
assertTrue(null == stats);
try {
status = fs.getFileStatus(dir);
fail("getFileStatus of non-existent path should fail");
} catch (FileNotFoundException fe) {
assertTrue(fe.getMessage().startsWith("File does not exist"));
}
// create the directory
assertTrue(fs.mkdirs(dir));
assertTrue(fs.exists(dir));
System.out.println("Dir : \"" + dir + "\"");
// test getFileStatus on an empty directory
status = fs.getFileStatus(dir);
assertTrue(dir + " should be a directory", status.isDir());
assertTrue(dir + " should be zero size ", status.getLen() == 0);
assertEquals(fs.makeQualified(dir).toString(),
status.getPath().toString());
// test listStatus on an empty directory
stats = fs.listStatus(dir);
assertEquals(dir + " should be empty", 0, stats.length);
assertEquals(dir + " should be zero size ",
0, fs.getContentSummary(dir).getLength());
assertEquals(dir + " should be zero size using hftp",
0, hftpfs.getContentSummary(dir).getLength());
assertTrue(dir + " should be zero size ",
fs.getFileStatus(dir).getLen() == 0);
System.out.println("Dir : \"" + dir + "\"");
// create another file that is smaller than a block.
//
Path file2 = new Path(dir, "filestatus2.dat");
writeFile(fs, file2, 1, blockSize/4, blockSize);
System.out.println("Created file filestatus2.dat with one "
+ " replicas.");
checkFile(fs, file2, 1);
System.out.println("Path : \"" + file2 + "\"");
// verify file attributes
status = fs.getFileStatus(file2);
assertTrue(status.getBlockSize() == blockSize);
assertTrue(status.getReplication() == 1);
file2 = fs.makeQualified(file2);
assertEquals(file2.toString(), status.getPath().toString());
// create another file in the same directory
Path file3 = new Path(dir, "filestatus3.dat");
writeFile(fs, file3, 1, blockSize/4, blockSize);
System.out.println("Created file filestatus3.dat with one "
+ " replicas.");
checkFile(fs, file3, 1);
file3 = fs.makeQualified(file3);
// verify that the size of the directory increased by the size
// of the two files
final int expected = blockSize/2;
assertEquals(dir + " size should be " + expected,
expected, fs.getContentSummary(dir).getLength());
assertEquals(dir + " size should be " + expected + " using hftp",
expected, hftpfs.getContentSummary(dir).getLength());
// test listStatus on a non-empty directory
stats = fs.listStatus(dir);
assertEquals(dir + " should have two entries", 2, stats.length);
assertEquals(file2.toString(), stats[0].getPath().toString());
assertEquals(file3.toString(), stats[1].getPath().toString());
// test iterative listing
// now dir has 2 entries, create one more
Path dir3 = fs.makeQualified(new Path(dir, "dir3"));
fs.mkdirs(dir3);
dir3 = fs.makeQualified(dir3);
stats = fs.listStatus(dir);
assertEquals(dir + " should have three entries", 3, stats.length);
assertEquals(dir3.toString(), stats[0].getPath().toString());
assertEquals(file2.toString(), stats[1].getPath().toString());
assertEquals(file3.toString(), stats[2].getPath().toString());
// now dir has 3 entries, create two more
Path dir4 = fs.makeQualified(new Path(dir, "dir4"));
fs.mkdirs(dir4);
dir4 = fs.makeQualified(dir4);
Path dir5 = fs.makeQualified(new Path(dir, "dir5"));
fs.mkdirs(dir5);
dir5 = fs.makeQualified(dir5);
stats = fs.listStatus(dir);
assertEquals(dir + " should have five entries", 5, stats.length);
assertEquals(dir3.toString(), stats[0].getPath().toString());
assertEquals(dir4.toString(), stats[1].getPath().toString());
assertEquals(dir5.toString(), stats[2].getPath().toString());
assertEquals(file2.toString(), stats[3].getPath().toString());
assertEquals(file3.toString(), stats[4].getPath().toString());
{ //test permission error on hftp
fs.setPermission(dir, new FsPermission((short)0));
try {
final String username = UserGroupInformation.getCurrentUser().getShortUserName() + "1";
final HftpFileSystem hftp2 = cluster.getHftpFileSystemAs(username, conf, "somegroup");
hftp2.getContentSummary(dir);
fail();
} catch(IOException ioe) {
FileSystem.LOG.info("GOOD: getting an exception", ioe);
}
}
} finally {
fs.close();
cluster.shutdown();
}
}
}