org.argeo.osgi.boot/src/org/argeo/osgi/boot/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.Map;
  24 import java.util.StringTokenizer;
  25
  26 import org.osgi.framework.Bundle;
  27 import org.osgi.framework.BundleException;
  28 import org.osgi.framework.launch.Framework;
  29 import org.osgi.framework.launch.FrameworkFactory;
  30
  31 /** Utilities, mostly related to logging. */
  32 public class OsgiBootUtils {
  33         /** ISO8601 (as per log4j) and difference to UTC */
  34         private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS Z");
  35
  36         static boolean debug = System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_DEBUG) == null ? false
  37                         : !System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_DEBUG).trim().equals("false");
  38
  39         public static void info(Object obj) {
  40                 System.out.println("# OSGiBOOT      # " + dateFormat.format(new Date()) + " # " + obj);
  41         }
  42
  43         public static void debug(Object obj) {
  44                 if (debug)
  45                         System.out.println("# OSGiBOOT DBG  # " + dateFormat.format(new Date()) + " # " + obj);
  46         }
  47
  48         public static void warn(Object obj) {
  49                 System.out.println("# OSGiBOOT WARN # " + dateFormat.format(new Date()) + " # " + obj);
  50         }
  51
  52         public static void error(Object obj, Throwable e) {
  53                 System.err.println("# OSGiBOOT ERR  # " + dateFormat.format(new Date()) + " # " + obj);
  54                 if (e != null)
  55                         e.printStackTrace();
  56         }
  57
  58         public static boolean isDebug() {
  59                 return debug;
  60         }
  61
  62         public static String stateAsString(int state) {
  63                 switch (state) {
  64                 case Bundle.UNINSTALLED:
  65                         return "UNINSTALLED";
  66                 case Bundle.INSTALLED:
  67                         return "INSTALLED";
  68                 case Bundle.RESOLVED:
  69                         return "RESOLVED";
  70                 case Bundle.STARTING:
  71                         return "STARTING";
  72                 case Bundle.ACTIVE:
  73                         return "ACTIVE";
  74                 case Bundle.STOPPING:
  75                         return "STOPPING";
  76                 default:
  77                         return Integer.toString(state);
  78                 }
  79         }
  80
  81         /**
  82          * @return ==0: versions are identical, &lt;0: tested version is newer, &gt;0:
  83          *         currentVersion is newer.
  84          */
  85         public static int compareVersions(String currentVersion, String testedVersion) {
  86                 List<String> cToks = new ArrayList<String>();
  87                 StringTokenizer cSt = new StringTokenizer(currentVersion, ".");
  88                 while (cSt.hasMoreTokens())
  89                         cToks.add(cSt.nextToken());
  90                 List<String> tToks = new ArrayList<String>();
  91                 StringTokenizer tSt = new StringTokenizer(currentVersion, ".");
  92                 while (tSt.hasMoreTokens())
  93                         tToks.add(tSt.nextToken());
  94
  95                 int comp = 0;
  96                 comp: for (int i = 0; i < cToks.size(); i++) {
  97                         if (tToks.size() <= i) {
  98                                 // equals until then, tested shorter
  99                                 comp = 1;
 100                                 break comp;
 101                         }
 102
 103                         String c = (String) cToks.get(i);
 104                         String t = (String) tToks.get(i);
 105
 106                         try {
 107                                 int cInt = Integer.parseInt(c);
 108                                 int tInt = Integer.parseInt(t);
 109                                 if (cInt == tInt)
 110                                         continue comp;
 111                                 else {
 112                                         comp = (cInt - tInt);
 113                                         break comp;
 114                                 }
 115                         } catch (NumberFormatException e) {
 116                                 if (c.equals(t))
 117                                         continue comp;
 118                                 else {
 119                                         comp = c.compareTo(t);
 120                                         break comp;
 121                                 }
 122                         }
 123                 }
 124
 125                 if (comp == 0 && tToks.size() > cToks.size()) {
 126                         // equals until then, current shorter
 127                         comp = -1;
 128                 }
 129
 130                 return comp;
 131         }
 132
 133         /** Launch an OSGi framework. */
 134         public static Framework launch(FrameworkFactory frameworkFactory, Map<String, String> configuration) {
 135                 // start OSGi
 136                 Framework framework = frameworkFactory.newFramework(configuration);
 137                 try {
 138                         framework.start();
 139                 } catch (BundleException e) {
 140                         throw new OsgiBootException("Cannot start OSGi framework", e);
 141                 }
 142                 return framework;
 143         }
 144
 145 }