| /** |
| * 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.fs; |
| |
| import java.io.*; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.FileUtil; |
| import static org.apache.hadoop.fs.FileContextTestHelper.*; |
| import static org.junit.Assert.*; |
| import org.junit.Test; |
| import org.junit.Before; |
| |
| /** |
| * Test symbolic links using FileContext and LocalFs. |
| */ |
| public class TestLocalFSFileContextSymlink extends FileContextSymlinkBaseTest { |
| |
| protected String getScheme() { |
| return "file"; |
| } |
| |
| protected String testBaseDir1() throws IOException { |
| return getAbsoluteTestRootDir(fc)+"/test1"; |
| } |
| |
| protected String testBaseDir2() throws IOException { |
| return getAbsoluteTestRootDir(fc)+"/test2"; |
| } |
| |
| protected URI testURI() { |
| try { |
| return new URI("file:///"); |
| } catch (URISyntaxException e) { |
| return null; |
| } |
| } |
| |
| @Before |
| public void setUp() throws Exception { |
| fc = FileContext.getLocalFSFileContext(); |
| super.setUp(); |
| } |
| |
| @Test |
| /** lstat a non-existant file using a partially qualified path */ |
| public void testDanglingLinkFilePartQual() throws IOException { |
| Path filePartQual = new Path(getScheme()+":///doesNotExist"); |
| try { |
| fc.getFileLinkStatus(filePartQual); |
| fail("Got FileStatus for non-existant file"); |
| } catch (FileNotFoundException f) { |
| // Expected |
| } |
| try { |
| fc.getLinkTarget(filePartQual); |
| fail("Got link target for non-existant file"); |
| } catch (FileNotFoundException f) { |
| // Expected |
| } |
| } |
| |
| @Test |
| /** Stat and lstat a dangling link */ |
| public void testDanglingLink() throws IOException { |
| Path fileAbs = new Path(testBaseDir1()+"/file"); |
| Path fileQual = new Path(testURI().toString(), fileAbs); |
| Path link = new Path(testBaseDir1()+"/linkToFile"); |
| fc.createSymlink(fileAbs, link, false); |
| // Deleting the link using FileContext currently fails because |
| // resolve looks up LocalFs rather than RawLocalFs for the path |
| // so we call ChecksumFs delete (which doesn't delete dangling |
| // links) instead of delegating to delete in RawLocalFileSystem |
| // which deletes via fullyDelete. testDeleteLink above works |
| // because the link is not dangling. |
| //assertTrue(fc.delete(link, false)); |
| FileUtil.fullyDelete(new File(link.toUri().getPath())); |
| fc.createSymlink(fileAbs, link, false); |
| try { |
| fc.getFileStatus(link); |
| fail("Got FileStatus for dangling link"); |
| } catch (FileNotFoundException f) { |
| // Expected. File's exists method returns false for dangling links |
| } |
| // We can stat a dangling link |
| FileStatus fsd = fc.getFileLinkStatus(link); |
| assertEquals(fileQual, fsd.getSymlink()); |
| assertTrue(fsd.isSymlink()); |
| assertFalse(fsd.isDirectory()); |
| assertEquals("", fsd.getOwner()); |
| assertEquals("", fsd.getGroup()); |
| assertEquals(link, fsd.getPath()); |
| assertEquals(0, fsd.getLen()); |
| assertEquals(0, fsd.getBlockSize()); |
| assertEquals(0, fsd.getReplication()); |
| assertEquals(0, fsd.getAccessTime()); |
| assertEquals(FsPermission.getDefault(), fsd.getPermission()); |
| // Accessing the link |
| try { |
| readFile(link); |
| fail("Got FileStatus for dangling link"); |
| } catch (FileNotFoundException f) { |
| // Ditto. |
| } |
| // Creating the file makes the link work |
| createAndWriteFile(fileAbs); |
| fc.getFileStatus(link); |
| } |
| |
| @Test |
| /** |
| * Test getLinkTarget with a partially qualified target. |
| * NB: Hadoop does not support fully qualified URIs for the |
| * file scheme (eg file://host/tmp/test). |
| */ |
| public void testGetLinkStatusPartQualTarget() throws IOException { |
| Path fileAbs = new Path(testBaseDir1()+"/file"); |
| Path fileQual = new Path(testURI().toString(), fileAbs); |
| Path dir = new Path(testBaseDir1()); |
| Path link = new Path(testBaseDir1()+"/linkToFile"); |
| Path dirNew = new Path(testBaseDir2()); |
| Path linkNew = new Path(testBaseDir2()+"/linkToFile"); |
| fc.delete(dirNew, true); |
| createAndWriteFile(fileQual); |
| fc.setWorkingDirectory(dir); |
| // Link target is partially qualified, we get the same back. |
| fc.createSymlink(fileQual, link, false); |
| assertEquals(fileQual, fc.getFileLinkStatus(link).getSymlink()); |
| // Because the target was specified with an absolute path the |
| // link fails to resolve after moving the parent directory. |
| fc.rename(dir, dirNew); |
| // The target is still the old path |
| assertEquals(fileQual, fc.getFileLinkStatus(linkNew).getSymlink()); |
| try { |
| readFile(linkNew); |
| fail("The link should be dangling now."); |
| } catch (FileNotFoundException x) { |
| // Expected. |
| } |
| // RawLocalFs only maintains the path part, not the URI, and |
| // therefore does not support links to other file systems. |
| Path anotherFs = new Path("hdfs://host:1000/dir/file"); |
| FileUtil.fullyDelete(new File(linkNew.toString())); |
| try { |
| fc.createSymlink(anotherFs, linkNew, false); |
| fail("Created a local fs link to a non-local fs"); |
| } catch (IOException x) { |
| // Excpected. |
| } |
| } |
| } |