| /** |
| * 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.server.namenode.snapshot; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.DFSTestUtil; |
| import org.apache.hadoop.hdfs.DistributedFileSystem; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.protocol.SnapshotException; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestFileContextSnapshot { |
| |
| private static final short REPLICATION = 3; |
| private static final int BLOCKSIZE = 1024; |
| private static final long SEED = 0; |
| private Configuration conf; |
| private MiniDFSCluster cluster; |
| private FileContext fileContext; |
| private DistributedFileSystem dfs; |
| |
| private final String snapshotRoot = "/snapshot"; |
| private final Path filePath = new Path(snapshotRoot, "file1"); |
| private Path snapRootPath; |
| |
| @Before |
| public void setUp() throws Exception { |
| conf = new Configuration(); |
| conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION) |
| .build(); |
| cluster.waitActive(); |
| |
| fileContext = FileContext.getFileContext(conf); |
| dfs = (DistributedFileSystem) cluster.getFileSystem(); |
| snapRootPath = new Path(snapshotRoot); |
| dfs.mkdirs(snapRootPath); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| if (cluster != null) { |
| cluster.shutdown(); |
| cluster = null; |
| } |
| } |
| |
| @Test(timeout = 60000) |
| public void testCreateAndDeleteSnapshot() throws Exception { |
| DFSTestUtil.createFile(dfs, filePath, BLOCKSIZE, REPLICATION, SEED); |
| // disallow snapshot on dir |
| dfs.disallowSnapshot(snapRootPath); |
| try { |
| fileContext.createSnapshot(snapRootPath, "s1"); |
| } catch (SnapshotException e) { |
| GenericTestUtils.assertExceptionContains( |
| "Directory is not a snapshottable directory: " + snapRootPath, e); |
| } |
| |
| // allow snapshot on dir |
| dfs.allowSnapshot(snapRootPath); |
| Path ssPath = fileContext.createSnapshot(snapRootPath, "s1"); |
| assertTrue("Failed to create snapshot", dfs.exists(ssPath)); |
| fileContext.deleteSnapshot(snapRootPath, "s1"); |
| assertFalse("Failed to delete snapshot", dfs.exists(ssPath)); |
| } |
| |
| /** |
| * Test FileStatus of snapshot file before/after rename |
| */ |
| @Test(timeout = 60000) |
| public void testRenameSnapshot() throws Exception { |
| DFSTestUtil.createFile(dfs, filePath, BLOCKSIZE, REPLICATION, SEED); |
| dfs.allowSnapshot(snapRootPath); |
| // Create snapshot for sub1 |
| Path snapPath1 = fileContext.createSnapshot(snapRootPath, "s1"); |
| Path ssPath = new Path(snapPath1, filePath.getName()); |
| assertTrue("Failed to create snapshot", dfs.exists(ssPath)); |
| FileStatus statusBeforeRename = dfs.getFileStatus(ssPath); |
| |
| // Rename the snapshot |
| fileContext.renameSnapshot(snapRootPath, "s1", "s2"); |
| // <sub1>/.snapshot/s1/file1 should no longer exist |
| assertFalse("Old snapshot still exists after rename!", dfs.exists(ssPath)); |
| Path snapshotRoot = SnapshotTestHelper.getSnapshotRoot(snapRootPath, "s2"); |
| ssPath = new Path(snapshotRoot, filePath.getName()); |
| |
| // Instead, <sub1>/.snapshot/s2/file1 should exist |
| assertTrue("Snapshot doesn't exists!", dfs.exists(ssPath)); |
| FileStatus statusAfterRename = dfs.getFileStatus(ssPath); |
| |
| // FileStatus of the snapshot should not change except the path |
| assertFalse("Filestatus of the snapshot matches", |
| statusBeforeRename.equals(statusAfterRename)); |
| statusBeforeRename.setPath(statusAfterRename.getPath()); |
| assertEquals("FileStatus of the snapshot mismatches!", |
| statusBeforeRename.toString(), statusAfterRename.toString()); |
| } |
| } |