/**
* 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 java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import org.apache.hadoop.conf.Configuration;
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.server.namenode.ListPathsServlet;
import org.apache.hadoop.security.UserGroupInformation;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
/**
* Test for {@link ListPathsServlet} that serves the URL
* http://<namenodeaddress:httpport?/listPaths
*
* This test does not use the servlet directly. Instead it is based on
* {@link HftpFileSystem}, which uses this servlet to implement
* {@link HftpFileSystem#listStatus(Path)} method.
*/
public class TestListPathServlet {
private static final Configuration CONF = new Configuration();
private static MiniDFSCluster cluster;
private static FileSystem fs;
private static URI hftpURI;
private static HftpFileSystem hftpFs;
private Random r = new Random();
private List<String> filelist = new ArrayList<String>();
@BeforeClass
public static void setup() throws Exception {
// start a cluster with single datanode
cluster = new MiniDFSCluster(CONF, 1, true, null);
cluster.waitActive();
fs = cluster.getFileSystem();
final String str = "hftp://"
+ CONF.get("dfs.http.address");
hftpURI = new URI(str);
hftpFs = (HftpFileSystem) FileSystem.get(hftpURI, CONF);
}
@AfterClass
public static void teardown() {
cluster.shutdown();
}
/** create a file with a length of <code>fileLen</code> */
private void createFile(String fileName, long fileLen) throws IOException {
filelist.add(hftpURI + fileName);
final Path filePath = new Path(fileName);
DFSTestUtil.createFile(fs, filePath, fileLen, (short) 1, r.nextLong());
}
private void mkdirs(String dirName) throws IOException {
filelist.add(hftpURI + dirName);
fs.mkdirs(new Path(dirName));
}
@Test
public void testListStatus() throws Exception {
// Empty root directory
checkStatus("/");
// Root directory with files and directories
createFile("/a", 1);
createFile("/b", 1);
mkdirs("/dir");
checkFile(new Path("/a"));
checkFile(new Path("/b"));
checkStatus("/");
// A directory with files and directories
createFile("/dir/.a.crc", 1);
createFile("/dir/b", 1);
mkdirs("/dir/dir1");
checkFile(new Path("/dir/.a.crc"));
checkFile(new Path("/dir/b"));
checkStatus("/dir");
// Non existent path
checkStatus("/nonexistent");
checkStatus("/nonexistent/a");
final String username = UserGroupInformation.getCurrentUser().getShortUserName() + "1";
final HftpFileSystem hftp2 = cluster.getHftpFileSystemAs(username, CONF, "somegroup");
{ //test file not found on hftp
final Path nonexistent = new Path("/nonexistent");
try {
hftp2.getFileStatus(nonexistent);
Assert.fail();
} catch(IOException ioe) {
FileSystem.LOG.info("GOOD: getting an exception", ioe);
}
}
{ //test permission error on hftp
final Path dir = new Path("/dir");
fs.setPermission(dir, new FsPermission((short)0));
try {
hftp2.getFileStatus(new Path(dir, "a"));
Assert.fail();
} catch(IOException ioe) {
FileSystem.LOG.info("GOOD: getting an exception", ioe);
}
}
}
private void checkStatus(String listdir) throws IOException {
final Path listpath = hftpFs.makeQualified(new Path(listdir));
listdir = listpath.toString();
final FileStatus[] statuslist = hftpFs.listStatus(listpath);
for (String directory : filelist) {
System.out.println("dir:" + directory);
}
for (String file : filelist) {
System.out.println("file:" + file);
}
for (FileStatus status : statuslist) {
System.out.println("status:" + status.getPath().toString() + " type "
+ (status.isDir() ? "directory" : "file"));
}
for (String file : filelist) {
boolean found = false;
// Consider only file under the list path
if (!file.startsWith(listpath.toString()) ||
file.equals(listpath.toString())) {
continue;
}
for (FileStatus status : statuslist) {
if (status.getPath().toString().equals(file)) {
found = true;
break;
}
}
Assert.assertTrue("Directory/file not returned in list status " + file,
found);
}
}
private void checkFile(final Path f) throws IOException {
final Path hdfspath = fs.makeQualified(f);
final FileStatus hdfsstatus = fs.getFileStatus(hdfspath);
FileSystem.LOG.info("hdfspath=" + hdfspath);
final Path hftppath = hftpFs.makeQualified(f);
final FileStatus hftpstatus = hftpFs.getFileStatus(hftppath);
FileSystem.LOG.info("hftppath=" + hftppath);
Assert.assertEquals(hdfspath.toUri().getPath(),
hdfsstatus.getPath().toUri().getPath());
checkFileStatus(hdfsstatus, hftpstatus);
}
private static void checkFileStatus(final FileStatus expected,
final FileStatus computed) {
Assert.assertEquals(expected.getPath().toUri().getPath(),
computed.getPath().toUri().getPath());
// TODO: test will fail if the following is un-commented.
// Assert.assertEquals(expected.getAccessTime(), computed.getAccessTime());
// Assert.assertEquals(expected.getModificationTime(),
// computed.getModificationTime());
Assert.assertEquals(expected.getBlockSize(), computed.getBlockSize());
Assert.assertEquals(expected.getGroup(), computed.getGroup());
Assert.assertEquals(expected.getLen(), computed.getLen());
Assert.assertEquals(expected.getOwner(), computed.getOwner());
Assert.assertEquals(expected.getPermission(), computed.getPermission());
Assert.assertEquals(expected.getReplication(), computed.getReplication());
}
}