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+/**
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+ * Licensed to the Apache Software Foundation (ASF) under one
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+ * or more contributor license agreements. See the NOTICE file
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+ * distributed with this work for additional information
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+ * regarding copyright ownership. The ASF licenses this file
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+ * to you under the Apache License, Version 2.0 (the
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+ * "License"); you may not use this file except in compliance
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+ * with the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.hadoop.tools;
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+
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+import static org.junit.Assert.*;
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+
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+import java.io.IOException;
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+import java.net.URI;
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+import java.util.Iterator;
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+import java.util.Map;
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+import java.util.Map.Entry;
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+
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+import org.apache.hadoop.conf.Configuration;
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+import org.apache.hadoop.fs.CommonConfigurationKeys;
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+import org.apache.hadoop.fs.FSDataInputStream;
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+import org.apache.hadoop.fs.FSDataOutputStream;
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+import org.apache.hadoop.fs.FileStatus;
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+import org.apache.hadoop.fs.FileSystem;
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+import org.apache.hadoop.fs.Path;
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+import org.apache.hadoop.fs.permission.FsPermission;
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+import org.apache.hadoop.hdfs.DFSConfigKeys;
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+import org.apache.hadoop.hdfs.MiniDFSCluster;
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+import org.apache.hadoop.io.IOUtils;
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+import org.apache.hadoop.util.Progressable;
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+import org.apache.hadoop.util.ToolRunner;
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+
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+import org.junit.AfterClass;
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+import org.junit.BeforeClass;
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+import org.junit.Test;
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+
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+import com.google.common.collect.Maps;
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+
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+/**
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+ * Tests distcp in combination with HDFS XAttrs.
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+ */
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+public class TestDistCpWithXAttrs {
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+
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+ private static MiniDFSCluster cluster;
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+ private static Configuration conf;
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+ private static FileSystem fs;
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+
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+ //XAttrs
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+ private static final String name1 = "user.a1";
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+ private static final byte[] value1 = {0x31, 0x32, 0x33};
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+ private static final String name2 = "trusted.a2";
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+ private static final byte[] value2 = {0x37, 0x38, 0x39};
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+ private static final String name3 = "user.a3";
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+ private static final byte[] value3 = null;
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+ private static final String name4 = "user.a4";
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+ private static final byte[] value4 = null;
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+
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+ private static final Path dir1 = new Path("/src/dir1");
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+ private static final Path subDir1 = new Path(dir1, "subdir1");
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+ private static final Path file1 = new Path("/src/file1");
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+ private static final Path dir2 = new Path("/src/dir2");
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+ private static final Path file2 = new Path(dir2, "file2");
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+ private static final Path file3 = new Path(dir2, "file3");
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+ private static final Path file4 = new Path(dir2, "file4");
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+ private static final Path dstDir1 = new Path("/dstPreserveXAttrs/dir1");
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+ private static final Path dstSubDir1 = new Path(dstDir1, "subdir1");
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+ private static final Path dstFile1 = new Path("/dstPreserveXAttrs/file1");
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+ private static final Path dstDir2 = new Path("/dstPreserveXAttrs/dir2");
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+ private static final Path dstFile2 = new Path(dstDir2, "file2");
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+ private static final Path dstFile3 = new Path(dstDir2, "file3");
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+ private static final Path dstFile4 = new Path(dstDir2, "file4");
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+
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+ @BeforeClass
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+ public static void init() throws Exception {
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+ initCluster(true, true);
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+ fs.mkdirs(subDir1);
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+ fs.create(file1).close();
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+ fs.mkdirs(dir2);
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+ fs.create(file2).close();
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+ fs.create(file3).close();
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+ fs.create(file4).close();
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+
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+ // dir1
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+ fs.setXAttr(dir1, name1, value1);
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+ fs.setXAttr(dir1, name2, value2);
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+
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+ // subDir1
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+ fs.setXAttr(subDir1, name1, value1);
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+ fs.setXAttr(subDir1, name3, value3);
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+
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+ // file1
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+ fs.setXAttr(file1, name1, value1);
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+ fs.setXAttr(file1, name2, value2);
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+ fs.setXAttr(file1, name3, value3);
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+
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+ // dir2
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+ fs.setXAttr(dir2, name2, value2);
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+
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+ // file2
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+ fs.setXAttr(file2, name1, value1);
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+ fs.setXAttr(file2, name4, value4);
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+
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+ // file3
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+ fs.setXAttr(file3, name3, value3);
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+ fs.setXAttr(file3, name4, value4);
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+ }
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+
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+ @AfterClass
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+ public static void shutdown() {
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+ IOUtils.cleanup(null, fs);
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+ if (cluster != null) {
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+ cluster.shutdown();
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+ }
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+ }
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+
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+ @Test
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+ public void testPreserveXAttrs() throws Exception {
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+ assertRunDistCp(DistCpConstants.SUCCESS, "/dstPreserveXAttrs");
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+
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+ // dstDir1
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+ Map<String, byte[]> xAttrs = Maps.newHashMap();
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+ xAttrs.put(name1, value1);
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+ xAttrs.put(name2, value2);
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+ assertXAttrs(dstDir1, xAttrs);
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+
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+ // dstSubDir1
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+ xAttrs.clear();
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+ xAttrs.put(name1, value1);
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+ xAttrs.put(name3, new byte[0]);
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+ assertXAttrs(dstSubDir1, xAttrs);
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+
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+ // dstFile1
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+ xAttrs.clear();
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+ xAttrs.put(name1, value1);
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+ xAttrs.put(name2, value2);
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+ xAttrs.put(name3, new byte[0]);
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+ assertXAttrs(dstFile1, xAttrs);
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+
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+ // dstDir2
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+ xAttrs.clear();
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+ xAttrs.put(name2, value2);
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+ assertXAttrs(dstDir2, xAttrs);
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+
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+ // dstFile2
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+ xAttrs.clear();
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+ xAttrs.put(name1, value1);
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+ xAttrs.put(name4, new byte[0]);
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+ assertXAttrs(dstFile2, xAttrs);
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+
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+ // dstFile3
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+ xAttrs.clear();
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+ xAttrs.put(name3, new byte[0]);
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+ xAttrs.put(name4, new byte[0]);
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+ assertXAttrs(dstFile3, xAttrs);
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+
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+ // dstFile4
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+ xAttrs.clear();
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+ assertXAttrs(dstFile4, xAttrs);
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+ }
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+
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+ @Test
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+ public void testXAttrsNotEnabled() throws Exception {
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+ try {
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+ restart(false);
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+ assertRunDistCp(DistCpConstants.XATTRS_NOT_SUPPORTED,
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+ "/dstXAttrsNotEnabled");
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+ } finally {
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+ restart(true);
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+ }
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+ }
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+
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+ @Test
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+ public void testXAttrsNotImplemented() throws Exception {
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+ assertRunDistCp(DistCpConstants.XATTRS_NOT_SUPPORTED,
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+ "stubfs://dstXAttrsNotImplemented");
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+ }
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+
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+ /**
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+ * Stub FileSystem implementation used for testing the case of attempting
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+ * distcp with XAttrs preserved on a file system that does not support XAttrs.
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+ * The base class implementation throws UnsupportedOperationException for
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+ * the XAttr methods, so we don't need to override them.
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+ */
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+ public static class StubFileSystem extends FileSystem {
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+
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+ @Override
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+ public FSDataOutputStream append(Path f, int bufferSize,
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+ Progressable progress) throws IOException {
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+ return null;
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+ }
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+
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+ @Override
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+ public FSDataOutputStream create(Path f, FsPermission permission,
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+ boolean overwrite, int bufferSize, short replication, long blockSize,
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+ Progressable progress) throws IOException {
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+ return null;
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+ }
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+
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+ @Override
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+ public boolean delete(Path f, boolean recursive) throws IOException {
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+ return false;
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+ }
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+
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+ @Override
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+ public FileStatus getFileStatus(Path f) throws IOException {
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+ return null;
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+ }
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+
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+ @Override
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+ public URI getUri() {
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+ return URI.create("stubfs:///");
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+ }
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+
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+ @Override
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+ public Path getWorkingDirectory() {
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+ return new Path(Path.SEPARATOR);
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+ }
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+
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+ @Override
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+ public FileStatus[] listStatus(Path f) throws IOException {
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+ return null;
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+ }
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+
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+ @Override
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+ public boolean mkdirs(Path f, FsPermission permission) throws IOException {
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+ return false;
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+ }
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+
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+ @Override
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+ public FSDataInputStream open(Path f, int bufferSize) throws IOException {
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+ return null;
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+ }
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+
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+ @Override
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+ public boolean rename(Path src, Path dst) throws IOException {
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+ return false;
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+ }
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+
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+ @Override
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+ public void setWorkingDirectory(Path dir) {
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+ }
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+ }
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+
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+ /**
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+ * Asserts the XAttrs returned by getXAttrs for a specific path.
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+ *
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+ * @param path String path to check
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+ * @param xAttrs XAttr[] expected xAttrs
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+ * @throws Exception if there is any error
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+ */
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+ private static void assertXAttrs(Path path, Map<String, byte[]> expectedXAttrs)
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+ throws Exception {
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+ Map<String, byte[]> xAttrs = fs.getXAttrs(path);
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+ assertEquals(expectedXAttrs.size(), xAttrs.size());
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+ Iterator<Entry<String, byte[]>> i = expectedXAttrs.entrySet().iterator();
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+ while (i.hasNext()) {
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+ Entry<String, byte[]> e = i.next();
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+ String name = e.getKey();
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+ byte[] value = e.getValue();
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+ if (value == null) {
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+ assertTrue(xAttrs.containsKey(name) && xAttrs.get(name) == null);
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+ } else {
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+ assertArrayEquals(value, xAttrs.get(name));
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+ }
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+ }
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+ }
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+
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+ /**
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+ * Runs distcp from /src to specified destination, preserving XAttrs. Asserts
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+ * expected exit code.
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+ *
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+ * @param int exitCode expected exit code
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+ * @param dst String distcp destination
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+ * @throws Exception if there is any error
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+ */
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+ private static void assertRunDistCp(int exitCode, String dst)
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+ throws Exception {
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+ DistCp distCp = new DistCp(conf, null);
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+ assertEquals(exitCode,
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+ ToolRunner.run(conf, distCp, new String[] { "-px", "/src", dst }));
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+ }
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+
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+ /**
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+ * Initialize the cluster, wait for it to become active, and get FileSystem.
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+ *
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+ * @param format if true, format the NameNode and DataNodes before starting up
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+ * @param xAttrsEnabled if true, XAttr support is enabled
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+ * @throws Exception if any step fails
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+ */
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+ private static void initCluster(boolean format, boolean xAttrsEnabled)
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+ throws Exception {
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+ conf = new Configuration();
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+ conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_XATTRS_ENABLED_KEY, xAttrsEnabled);
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+ conf.set(CommonConfigurationKeys.FS_DEFAULT_NAME_KEY, "stubfs:///");
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+ conf.setClass("fs.stubfs.impl", StubFileSystem.class, FileSystem.class);
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+ cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).format(format)
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+ .build();
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+ cluster.waitActive();
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+ fs = cluster.getFileSystem();
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+ }
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+
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+ /**
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+ * Restarts the cluster with XAttrs enabled or disabled.
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+ *
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+ * @param xAttrsEnabled if true, XAttr support is enabled
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+ * @throws Exception if any step fails
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+ */
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+ private static void restart(boolean xAttrsEnabled) throws Exception {
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+ shutdown();
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+ initCluster(false, xAttrsEnabled);
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+ }
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+}
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Uma Maheswara Rao G