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1   /**
2    * Copyright 2010 The Apache Software Foundation
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  
21  package org.apache.hadoop.hbase.util;
22  
23  import org.apache.hadoop.hbase.VersionAnnotation;
24  
25  /**
26   * This class finds the package info for hbase and the VersionAnnotation
27   * information.  Taken from hadoop.  Only name of annotation is different.
28   */
29  public class VersionInfo {
30    private static Package myPackage;
31    private static VersionAnnotation version;
32  
33    static {
34      myPackage = VersionAnnotation.class.getPackage();
35      version = myPackage.getAnnotation(VersionAnnotation.class);
36    }
37  
38    /**
39     * Get the meta-data for the hbase package.
40     * @return package
41     */
42    static Package getPackage() {
43      return myPackage;
44    }
45  
46    /**
47     * Get the hbase version.
48     * @return the hbase version string, eg. "0.6.3-dev"
49     */
50    public static String getVersion() {
51      return version != null ? version.version() : "Unknown";
52    }
53  
54    /**
55     * Get the subversion revision number for the root directory
56     * @return the revision number, eg. "451451"
57     */
58    public static String getRevision() {
59      return version != null ? version.revision() : "Unknown";
60    }
61  
62    /**
63     * The date that hbase was compiled.
64     * @return the compilation date in unix date format
65     */
66    public static String getDate() {
67      return version != null ? version.date() : "Unknown";
68    }
69  
70    /**
71     * The user that compiled hbase.
72     * @return the username of the user
73     */
74    public static String getUser() {
75      return version != null ? version.user() : "Unknown";
76    }
77  
78    /**
79     * Get the subversion URL for the root hbase directory.
80     * @return the url
81     */
82    public static String getUrl() {
83      return version != null ? version.url() : "Unknown";
84    }
85  
86    public static void main(String[] args) {
87      System.out.println("HBase " + getVersion());
88      System.out.println("Subversion " + getUrl() + " -r " + getRevision());
89      System.out.println("Compiled by " + getUser() + " on " + getDate());
90    }
91  }