org.argeo.osgi.boot/src/org/argeo/osgi/boot/OsgiBootUtils.java

   1 package org.argeo.osgi.boot;
   2
   3 import java.text.DateFormat;
   4 import java.text.SimpleDateFormat;
   5 import java.util.ArrayList;
   6 import java.util.Date;
   7 import java.util.List;
   8 import java.util.Map;
   9 import java.util.StringTokenizer;
  10
  11 import org.osgi.framework.Bundle;
  12 import org.osgi.framework.BundleException;
  13 import org.osgi.framework.launch.Framework;
  14 import org.osgi.framework.launch.FrameworkFactory;
  15
  16 /** Utilities, mostly related to logging. */
  17 public class OsgiBootUtils {
  18         /** ISO8601 (as per log4j) and difference to UTC */
  19         private static DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS Z");
  20
  21         static boolean debug = System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_DEBUG) == null ? false
  22                         : !System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_DEBUG).trim().equals("false");
  23
  24         public static void info(Object obj) {
  25                 System.out.println("# OSGiBOOT      # " + dateFormat.format(new Date()) + " # " + obj);
  26         }
  27
  28         public static void debug(Object obj) {
  29                 if (debug)
  30                         System.out.println("# OSGiBOOT DBG  # " + dateFormat.format(new Date()) + " # " + obj);
  31         }
  32
  33         public static void warn(Object obj) {
  34                 System.out.println("# OSGiBOOT WARN # " + dateFormat.format(new Date()) + " # " + obj);
  35         }
  36
  37         public static void error(Object obj, Throwable e) {
  38                 System.err.println("# OSGiBOOT ERR  # " + dateFormat.format(new Date()) + " # " + obj);
  39                 if (e != null)
  40                         e.printStackTrace();
  41         }
  42
  43         public static boolean isDebug() {
  44                 return debug;
  45         }
  46
  47         public static String stateAsString(int state) {
  48                 switch (state) {
  49                 case Bundle.UNINSTALLED:
  50                         return "UNINSTALLED";
  51                 case Bundle.INSTALLED:
  52                         return "INSTALLED";
  53                 case Bundle.RESOLVED:
  54                         return "RESOLVED";
  55                 case Bundle.STARTING:
  56                         return "STARTING";
  57                 case Bundle.ACTIVE:
  58                         return "ACTIVE";
  59                 case Bundle.STOPPING:
  60                         return "STOPPING";
  61                 default:
  62                         return Integer.toString(state);
  63                 }
  64         }
  65
  66         /**
  67          * @return ==0: versions are identical, &lt;0: tested version is newer, &gt;0:
  68          *         currentVersion is newer.
  69          */
  70         public static int compareVersions(String currentVersion, String testedVersion) {
  71                 List<String> cToks = new ArrayList<String>();
  72                 StringTokenizer cSt = new StringTokenizer(currentVersion, ".");
  73                 while (cSt.hasMoreTokens())
  74                         cToks.add(cSt.nextToken());
  75                 List<String> tToks = new ArrayList<String>();
  76                 StringTokenizer tSt = new StringTokenizer(currentVersion, ".");
  77                 while (tSt.hasMoreTokens())
  78                         tToks.add(tSt.nextToken());
  79
  80                 int comp = 0;
  81                 comp: for (int i = 0; i < cToks.size(); i++) {
  82                         if (tToks.size() <= i) {
  83                                 // equals until then, tested shorter
  84                                 comp = 1;
  85                                 break comp;
  86                         }
  87
  88                         String c = (String) cToks.get(i);
  89                         String t = (String) tToks.get(i);
  90
  91                         try {
  92                                 int cInt = Integer.parseInt(c);
  93                                 int tInt = Integer.parseInt(t);
  94                                 if (cInt == tInt)
  95                                         continue comp;
  96                                 else {
  97                                         comp = (cInt - tInt);
  98                                         break comp;
  99                                 }
 100                         } catch (NumberFormatException e) {
 101                                 if (c.equals(t))
 102                                         continue comp;
 103                                 else {
 104                                         comp = c.compareTo(t);
 105                                         break comp;
 106                                 }
 107                         }
 108                 }
 109
 110                 if (comp == 0 && tToks.size() > cToks.size()) {
 111                         // equals until then, current shorter
 112                         comp = -1;
 113                 }
 114
 115                 return comp;
 116         }
 117
 118         /** Launch an OSGi framework. */
 119         public static Framework launch(FrameworkFactory frameworkFactory, Map<String, String> configuration) {
 120                 // start OSGi
 121                 Framework framework = frameworkFactory.newFramework(configuration);
 122                 try {
 123                         framework.start();
 124                 } catch (BundleException e) {
 125                         throw new OsgiBootException("Cannot start OSGi framework", e);
 126                 }
 127                 return framework;
 128         }
 129
 130 }