| /** |
| * 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.mrunit.internal.util; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.util.List; |
| import java.util.UUID; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.util.RunJar; |
| |
| public class DistCacheUtils { |
| |
| private static final String CACHE_LOCALARCHIVES = "mapred.cache.localArchives"; |
| private static final String CACHE_LOCALFILES = "mapred.cache.localFiles"; |
| private static final Log LOG = LogFactory.getLog(DistCacheUtils.class); |
| |
| private DistCacheUtils() { |
| // |
| } |
| |
| /** |
| * Attempt to create a URI from a string path. First tries to load as a |
| * class resource, and failing that, loads as a File. |
| * |
| * @param path path to resource |
| * @return the uri of the resource |
| */ |
| public static URI findResource(String path) { |
| URI uri = null; |
| try { |
| URL resourceUrl = DistCacheUtils.class.getClassLoader().getResource(path); |
| if (resourceUrl != null) { |
| uri = resourceUrl.toURI(); |
| } else { |
| uri = new File(path).toURI(); |
| } |
| } catch (URISyntaxException e) { |
| throw new IllegalArgumentException(path + " could not be found", e); |
| } |
| if (uri == null) { |
| throw new IllegalArgumentException(path + " could not be found"); |
| } |
| return uri; |
| } |
| |
| /** |
| * Creates a comma separated list from a list of Path objects. |
| * Method borrowed from Hadoop's TaskDistributedCacheManager |
| */ |
| public static String stringifyPathList(List<Path> p){ |
| if (p == null || p.isEmpty()) { |
| return null; |
| } |
| StringBuilder str = new StringBuilder(p.get(0).toString()); |
| for (int i = 1; i < p.size(); i++){ |
| str.append(","); |
| str.append(p.get(i).toString()); |
| } |
| return str.toString(); |
| } |
| |
| /** |
| * Create a randomly named temporary directory |
| * |
| * @return the file handle of the directory |
| * @throws IOException |
| */ |
| public static File createTempDirectory() throws IOException { |
| File tmpDir = new File(System.getProperty("java.io.tmpdir"), |
| "mrunit-" + UUID.randomUUID().toString()); |
| LOG.debug("Creating temp directory " + tmpDir); |
| tmpDir.mkdirs(); |
| return tmpDir; |
| } |
| |
| /** |
| * Extract an archive to the temp directory. |
| * Code borrowed from Hadoop's TrackerDistributedCacheManager |
| * |
| * @param cacheArchive the cache archive to extract |
| * @param tmpDir root location of temp directory |
| * @return the path to the extracted archive |
| * @throws IOException |
| */ |
| public static Path extractArchiveToTemp(Path cacheArchive, File tmpDir) throws IOException { |
| String tmpArchive = cacheArchive.getName().toLowerCase(); |
| File srcFile = new File(cacheArchive.toString()); |
| File destDir = new File(tmpDir, srcFile.getName()); |
| LOG.debug(String.format("Extracting %s to %s", |
| srcFile.toString(), destDir.toString())); |
| if (tmpArchive.endsWith(".jar")) { |
| RunJar.unJar(srcFile, destDir); |
| } else if (tmpArchive.endsWith(".zip")) { |
| FileUtil.unZip(srcFile, destDir); |
| } else if (isTarFile(tmpArchive)) { |
| FileUtil.unTar(srcFile, destDir); |
| } else { |
| LOG.warn(String.format( |
| "Cache file %s specified as archive, but not valid extension.", |
| srcFile.toString())); |
| return cacheArchive; |
| } |
| return new Path(destDir.toString()); |
| } |
| |
| private static boolean isTarFile(String filename) { |
| return (filename.endsWith(".tgz") || filename.endsWith(".tar.gz") || |
| filename.endsWith(".tar")); |
| } |
| |
| public static void addLocalFiles(Configuration conf, String str) { |
| String files = conf.get(CACHE_LOCALFILES); |
| conf.set(CACHE_LOCALFILES, files == null ? str |
| : files + "," + str); |
| } |
| |
| public static void addLocalArchives(Configuration conf, String str) { |
| String files = conf.get(CACHE_LOCALARCHIVES); |
| conf.set(CACHE_LOCALARCHIVES, files == null ? str |
| : files + "," + str); |
| } |
| |
| } |