| /** |
| * 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.*; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| public class TestDFSRename extends junit.framework.TestCase { |
| static int countLease(MiniDFSCluster cluster) { |
| return cluster.getNamesystem().leaseManager.countLease(); |
| } |
| |
| final Path dir = new Path("/test/rename/"); |
| |
| void list(FileSystem fs, String name) throws IOException { |
| FileSystem.LOG.info("\n\n" + name); |
| for(FileStatus s : fs.listStatus(dir)) { |
| FileSystem.LOG.info("" + s.getPath()); |
| } |
| } |
| |
| static void createFile(FileSystem fs, Path f) throws IOException { |
| DataOutputStream a_out = fs.create(f); |
| a_out.writeBytes("something"); |
| a_out.close(); |
| } |
| |
| public void testRename() throws Exception { |
| Configuration conf = new HdfsConfiguration(); |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build(); |
| try { |
| FileSystem fs = cluster.getFileSystem(); |
| assertTrue(fs.mkdirs(dir)); |
| |
| { //test lease |
| Path a = new Path(dir, "a"); |
| Path aa = new Path(dir, "aa"); |
| Path b = new Path(dir, "b"); |
| |
| createFile(fs, a); |
| |
| //should not have any lease |
| assertEquals(0, countLease(cluster)); |
| |
| DataOutputStream aa_out = fs.create(aa); |
| aa_out.writeBytes("something"); |
| |
| //should have 1 lease |
| assertEquals(1, countLease(cluster)); |
| list(fs, "rename0"); |
| fs.rename(a, b); |
| list(fs, "rename1"); |
| aa_out.writeBytes(" more"); |
| aa_out.close(); |
| list(fs, "rename2"); |
| |
| //should not have any lease |
| assertEquals(0, countLease(cluster)); |
| } |
| |
| { // test non-existent destination |
| Path dstPath = new Path("/c/d"); |
| assertFalse(fs.exists(dstPath)); |
| assertFalse(fs.rename(dir, dstPath)); |
| } |
| |
| { // dst cannot be a file or directory under src |
| // test rename /a/b/foo to /a/b/c |
| Path src = new Path("/a/b"); |
| Path dst = new Path("/a/b/c"); |
| |
| createFile(fs, new Path(src, "foo")); |
| |
| // dst cannot be a file under src |
| assertFalse(fs.rename(src, dst)); |
| |
| // dst cannot be a directory under src |
| assertFalse(fs.rename(src.getParent(), dst.getParent())); |
| } |
| |
| { // dst can start with src, if it is not a directory or file under src |
| // test rename /test /testfile |
| Path src = new Path("/testPrefix"); |
| Path dst = new Path("/testPrefixfile"); |
| |
| createFile(fs, src); |
| assertTrue(fs.rename(src, dst)); |
| } |
| |
| { // dst should not be same as src test rename /a/b/c to /a/b/c |
| Path src = new Path("/a/b/c"); |
| createFile(fs, src); |
| assertTrue(fs.rename(src, src)); |
| assertFalse(fs.rename(new Path("/a/b"), new Path("/a/b/"))); |
| assertTrue(fs.rename(src, new Path("/a/b/c/"))); |
| } |
| fs.delete(dir, true); |
| } finally { |
| if (cluster != null) {cluster.shutdown();} |
| } |
| } |
| } |