content: /*
   * 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 backtype.storm.utils;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Properties;
  
  public class VersionInfo {
  
      private Properties info;
  
      protected VersionInfo(String component) {
          info = new Properties();
          String versionInfoFile = component + "-version-info.properties";
          InputStream is = null;
          try {
              is = Thread.currentThread().getContextClassLoader().getResourceAsStream(versionInfoFile);
              if (is == null) {
                  throw new IOException("Resource not found");
              }
              info.load(is);
          } catch (IOException ignored) {
          } finally {
              if (is != null) {
                  try {
                      is.close();
                  } catch (IOException ignored) {
                  }
              }
          }
      }
  
      protected String _getVersion() {
          return info.getProperty("version", "Unknown");
      }
  
      protected String _getRevision() {
          return info.getProperty("revision", "Unknown");
      }
  
      protected String _getBranch() {
          return info.getProperty("branch", "Unknown");
      }
  
      protected String _getDate() {
          return info.getProperty("date", "Unknown");
      }
  
      protected String _getUser() {
          return info.getProperty("user", "Unknown");
      }
  
      protected String _getUrl() {
          return info.getProperty("url", "Unknown");
      }
  
      protected String _getSrcChecksum() {
          return info.getProperty("srcChecksum", "Unknown");
      }
  
      protected String _getBuildVersion() {
          return getVersion() + " from " + _getRevision() + " by " + _getUser() + " source checksum " + _getSrcChecksum();
      }
  
      private static VersionInfo COMMON_VERSION_INFO = new VersionInfo("storm-core");
  
      public static String getVersion() {
          return COMMON_VERSION_INFO._getVersion();
      }
  
      public static String getRevision() {
          return COMMON_VERSION_INFO._getRevision();
      }
  
      public static String getBranch() {
          return COMMON_VERSION_INFO._getBranch();
      }
  
      public static String getDate() {
          return COMMON_VERSION_INFO._getDate();
      }
  
      public static String getUser() {
          return COMMON_VERSION_INFO._getUser();
      }
  
      public static String getUrl() {
          return COMMON_VERSION_INFO._getUrl();
      }
  
      public static String getSrcChecksum() {
          return COMMON_VERSION_INFO._getSrcChecksum();
      }
  
      public static String getBuildVersion() {
          return COMMON_VERSION_INFO._getBuildVersion();
      }
  
      public static void main(String[] args) {
          System.out.println("Storm " + getVersion());
          System.out.println("URL " + getUrl() + " -r " + getRevision());
          System.out.println("Branch " + getBranch());
          System.out.println("Compiled by " + getUser() + " on " + getDate());
          System.out.println("From source with checksum " + getSrcChecksum());
      }
  }
  