| /* |
| * 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.util; |
| |
| import org.apache.hadoop.HadoopVersionAnnotation; |
| |
| /** |
| * This class finds the package info for Hadoop and the HadoopVersionAnnotation |
| * information. |
| */ |
| public class VersionInfo { |
| private static Package myPackage; |
| private static HadoopVersionAnnotation version; |
| |
| static { |
| myPackage = HadoopVersionAnnotation.class.getPackage(); |
| version = myPackage.getAnnotation(HadoopVersionAnnotation.class); |
| } |
| |
| /** |
| * Get the meta-data for the Hadoop package. |
| * @return |
| */ |
| static Package getPackage() { |
| return myPackage; |
| } |
| |
| /** |
| * Get the Hadoop version. |
| * @return the Hadoop version string, eg. "0.6.3-dev" |
| */ |
| public static String getVersion() { |
| return version != null ? version.version() : "Unknown"; |
| } |
| |
| /** |
| * Get the subversion revision number for the root directory |
| * @return the revision number, eg. "451451" |
| */ |
| public static String getRevision() { |
| return version != null ? version.revision() : "Unknown"; |
| } |
| |
| /** |
| * The date that Hadoop was compiled. |
| * @return the compilation date in unix date format |
| */ |
| public static String getDate() { |
| return version != null ? version.date() : "Unknown"; |
| } |
| |
| /** |
| * The user that compiled Hadoop. |
| * @return the username of the user |
| */ |
| public static String getUser() { |
| return version != null ? version.user() : "Unknown"; |
| } |
| |
| /** |
| * Get the subversion URL for the root Hadoop directory. |
| */ |
| public static String getUrl() { |
| return version != null ? version.url() : "Unknown"; |
| } |
| |
| /** |
| * Returns the buildVersion which includes version, |
| * revision, user and date. |
| */ |
| public static String getBuildVersion(){ |
| return VersionInfo.getVersion() + |
| " from " + VersionInfo.getRevision() + |
| " by " + VersionInfo.getUser() + |
| " on " + VersionInfo.getDate(); |
| } |
| |
| public static void main(String[] args) { |
| System.out.println("Hadoop " + getVersion()); |
| System.out.println("Subversion " + getUrl() + " -r " + getRevision()); |
| System.out.println("Compiled by " + getUser() + " on " + getDate()); |
| } |
| } |