OsgiBootUtils.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.osgi.boot;
  17
  18 import java.text.DateFormat;
  19 import java.text.SimpleDateFormat;
  20 import java.util.ArrayList;
  21 import java.util.Date;
  22 import java.util.List;
  23 import java.util.StringTokenizer;
  24
  25 import org.osgi.framework.Bundle;
  26
  27 /** Utilities, mostly related to logging. */
  28 public class OsgiBootUtils {
  29         /** ISO8601 (as per log4j) and difference to UTC */
  30         private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS Z");
  31
  32         public static void info(Object obj) {
  33                 System.out.println("# OSGiBOOT      # " + dateFormat.format(new Date()) + " # " + obj);
  34         }
  35
  36         public static void debug(Object obj) {
  37                 System.out.println("# OSGiBOOT DBG  # " + dateFormat.format(new Date()) + " # " + obj);
  38         }
  39
  40         public static void warn(Object obj) {
  41                 System.out.println("# OSGiBOOT WARN # " + dateFormat.format(new Date()) + " # " + obj);
  42         }
  43
  44         public static void error(Object obj, Throwable e) {
  45                 System.err.println("# OSGiBOOT ERR  # " + dateFormat.format(new Date()) + " # " + obj);
  46                 if (e != null)
  47                         e.printStackTrace();
  48         }
  49
  50         /**
  51          * Gets a property value
  52          *
  53          * @return null when defaultValue is ""
  54          */
  55         public static String getProperty(String name, String defaultValue) {
  56                 final String value;
  57                 if (defaultValue != null)
  58                         value = System.getProperty(name, defaultValue);
  59                 else
  60                         value = System.getProperty(name);
  61
  62                 if (value == null || value.equals(""))
  63                         return null;
  64                 else
  65                         return value;
  66         }
  67
  68         public static String getProperty(String name) {
  69                 return getProperty(name, null);
  70         }
  71
  72         public static String stateAsString(int state) {
  73                 switch (state) {
  74                 case Bundle.UNINSTALLED:
  75                         return "UNINSTALLED";
  76                 case Bundle.INSTALLED:
  77                         return "INSTALLED";
  78                 case Bundle.RESOLVED:
  79                         return "RESOLVED";
  80                 case Bundle.STARTING:
  81                         return "STARTING";
  82                 case Bundle.ACTIVE:
  83                         return "ACTIVE";
  84                 case Bundle.STOPPING:
  85                         return "STOPPING";
  86                 default:
  87                         return Integer.toString(state);
  88                 }
  89         }
  90
  91         /**
  92          * @return ==0: versions are identical, <0: tested version is newer, >0:
  93          *         currentVersion is newer.
  94          */
  95         public static int compareVersions(String currentVersion, String testedVersion) {
  96                 List<String> cToks = new ArrayList<String>();
  97                 StringTokenizer cSt = new StringTokenizer(currentVersion, ".");
  98                 while (cSt.hasMoreTokens())
  99                         cToks.add(cSt.nextToken());
 100                 List<String> tToks = new ArrayList<String>();
 101                 StringTokenizer tSt = new StringTokenizer(currentVersion, ".");
 102                 while (tSt.hasMoreTokens())
 103                         tToks.add(tSt.nextToken());
 104
 105                 int comp = 0;
 106                 comp: for (int i = 0; i < cToks.size(); i++) {
 107                         if (tToks.size() <= i) {
 108                                 // equals until then, tested shorter
 109                                 comp = 1;
 110                                 break comp;
 111                         }
 112
 113                         String c = (String) cToks.get(i);
 114                         String t = (String) tToks.get(i);
 115
 116                         try {
 117                                 int cInt = Integer.parseInt(c);
 118                                 int tInt = Integer.parseInt(t);
 119                                 if (cInt == tInt)
 120                                         continue comp;
 121                                 else {
 122                                         comp = (cInt - tInt);
 123                                         break comp;
 124                                 }
 125                         } catch (NumberFormatException e) {
 126                                 if (c.equals(t))
 127                                         continue comp;
 128                                 else {
 129                                         comp = c.compareTo(t);
 130                                         break comp;
 131                                 }
 132                         }
 133                 }
 134
 135                 if (comp == 0 && tToks.size() > cToks.size()) {
 136                         // equals until then, current shorter
 137                         comp = -1;
 138                 }
 139
 140                 return comp;
 141         }
 142
 143 }