Rename OSGi Boot to Argeo Init and introduce logging framework.
[lgpl/argeo-commons.git] / org.argeo.init / src / org / argeo / init / osgi / OsgiBoot.java
diff --git a/org.argeo.init/src/org/argeo/init/osgi/OsgiBoot.java b/org.argeo.init/src/org/argeo/init/osgi/OsgiBoot.java
new file mode 100644 (file)
index 0000000..aeec0b7
--- /dev/null
@@ -0,0 +1,752 @@
+package org.argeo.init.osgi;
+
+import static org.argeo.init.osgi.OsgiBootUtils.debug;
+import static org.argeo.init.osgi.OsgiBootUtils.warn;
+
+import java.io.File;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.PathMatcher;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.StringTokenizer;
+import java.util.TreeMap;
+
+import org.argeo.init.a2.A2Source;
+import org.argeo.init.a2.ProvisioningManager;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.FrameworkEvent;
+import org.osgi.framework.Version;
+import org.osgi.framework.startlevel.BundleStartLevel;
+import org.osgi.framework.startlevel.FrameworkStartLevel;
+import org.osgi.framework.wiring.FrameworkWiring;
+
+/**
+ * Basic provisioning of an OSGi runtime via file path patterns and system
+ * properties. The approach is to generate list of URLs based on various
+ * methods, configured via properties.
+ */
+public class OsgiBoot implements OsgiBootConstants {
+       public final static String PROP_ARGEO_OSGI_START = "argeo.osgi.start";
+       public final static String PROP_ARGEO_OSGI_SOURCES = "argeo.osgi.sources";
+
+       public final static String PROP_ARGEO_OSGI_BUNDLES = "argeo.osgi.bundles";
+       public final static String PROP_ARGEO_OSGI_BASE_URL = "argeo.osgi.baseUrl";
+       public final static String PROP_ARGEO_OSGI_LOCAL_CACHE = "argeo.osgi.localCache";
+       public final static String PROP_ARGEO_OSGI_DISTRIBUTION_URL = "argeo.osgi.distributionUrl";
+
+       // booleans
+       public final static String PROP_ARGEO_OSGI_BOOT_DEBUG = "argeo.osgi.boot.debug";
+       // public final static String PROP_ARGEO_OSGI_BOOT_EXCLUDE_SVN =
+       // "argeo.osgi.boot.excludeSvn";
+
+       public final static String PROP_ARGEO_OSGI_BOOT_SYSTEM_PROPERTIES_FILE = "argeo.osgi.boot.systemPropertiesFile";
+       public final static String PROP_ARGEO_OSGI_BOOT_APPCLASS = "argeo.osgi.boot.appclass";
+       public final static String PROP_ARGEO_OSGI_BOOT_APPARGS = "argeo.osgi.boot.appargs";
+
+       public final static String DEFAULT_BASE_URL = "reference:file:";
+       // public final static String EXCLUDES_SVN_PATTERN = "**/.svn/**";
+
+       // OSGi system properties
+       final static String PROP_OSGI_BUNDLES_DEFAULTSTARTLEVEL = "osgi.bundles.defaultStartLevel";
+       final static String PROP_OSGI_STARTLEVEL = "osgi.startLevel";
+       final static String INSTANCE_AREA_PROP = "osgi.instance.area";
+       final static String CONFIGURATION_AREA_PROP = "osgi.configuration.area";
+
+       // Symbolic names
+       public final static String SYMBOLIC_NAME_OSGI_BOOT = "org.argeo.osgi.boot";
+       public final static String SYMBOLIC_NAME_EQUINOX = "org.eclipse.osgi";
+
+       /** Exclude svn metadata implicitely(a bit costly) */
+       // private boolean excludeSvn =
+       // Boolean.valueOf(System.getProperty(PROP_ARGEO_OSGI_BOOT_EXCLUDE_SVN,
+       // "false"))
+       // .booleanValue();
+
+       /** Default is 10s */
+       @Deprecated
+       private long defaultTimeout = 10000l;
+
+       private final BundleContext bundleContext;
+       private final String localCache;
+
+       private final ProvisioningManager provisioningManager;
+
+       /*
+        * INITIALIZATION
+        */
+       /** Constructor */
+       public OsgiBoot(BundleContext bundleContext) {
+               this.bundleContext = bundleContext;
+               Path homePath = Paths.get(System.getProperty("user.home")).toAbsolutePath();
+               String homeUri = homePath.toUri().toString();
+               localCache = getProperty(PROP_ARGEO_OSGI_LOCAL_CACHE, homeUri + ".m2/repository/");
+
+               provisioningManager = new ProvisioningManager(bundleContext);
+               String sources = getProperty(PROP_ARGEO_OSGI_SOURCES);
+               if (sources == null) {
+                       provisioningManager.registerDefaultSource();
+               } else {
+                       for (String source : sources.split(",")) {
+                               if (source.trim().equals(A2Source.DEFAULT_A2_URI)) {
+                                       if (Files.exists(homePath))
+                                               provisioningManager.registerSource(
+                                                               A2Source.SCHEME_A2 + "://" + homePath.toString() + "/.local/share/osgi");
+                                       provisioningManager.registerSource(A2Source.SCHEME_A2 + ":///usr/local/share/osgi");
+                                       provisioningManager.registerSource(A2Source.SCHEME_A2 + ":///usr/share/osgi");
+                               } else {
+                                       provisioningManager.registerSource(source);
+                               }
+                       }
+               }
+       }
+
+       ProvisioningManager getProvisioningManager() {
+               return provisioningManager;
+       }
+
+       /*
+        * HIGH-LEVEL METHODS
+        */
+       /** Bootstraps the OSGi runtime */
+       public void bootstrap() {
+               try {
+                       long begin = System.currentTimeMillis();
+                       System.out.println();
+                       String osgiInstancePath = bundleContext.getProperty(INSTANCE_AREA_PROP);
+                       OsgiBootUtils
+                                       .info("OSGi bootstrap starting" + (osgiInstancePath != null ? " (" + osgiInstancePath + ")" : ""));
+                       installUrls(getBundlesUrls());
+                       installUrls(getDistributionUrls());
+                       provisioningManager.install(null);
+                       startBundles();
+                       long duration = System.currentTimeMillis() - begin;
+                       OsgiBootUtils.info("OSGi bootstrap completed in " + Math.round(((double) duration) / 1000) + "s ("
+                                       + duration + "ms), " + bundleContext.getBundles().length + " bundles");
+               } catch (RuntimeException e) {
+                       OsgiBootUtils.error("OSGi bootstrap FAILED", e);
+                       throw e;
+               }
+
+               // diagnostics
+               if (OsgiBootUtils.debug) {
+                       OsgiBootDiagnostics diagnostics = new OsgiBootDiagnostics(bundleContext);
+                       diagnostics.checkUnresolved();
+                       Map<String, Set<String>> duplicatePackages = diagnostics.findPackagesExportedTwice();
+                       if (duplicatePackages.size() > 0) {
+                               OsgiBootUtils.info("Packages exported twice:");
+                               Iterator<String> it = duplicatePackages.keySet().iterator();
+                               while (it.hasNext()) {
+                                       String pkgName = it.next();
+                                       OsgiBootUtils.info(pkgName);
+                                       Set<String> bdles = duplicatePackages.get(pkgName);
+                                       Iterator<String> bdlesIt = bdles.iterator();
+                                       while (bdlesIt.hasNext())
+                                               OsgiBootUtils.info("  " + bdlesIt.next());
+                               }
+                       }
+               }
+               System.out.println();
+       }
+
+       public void update() {
+               provisioningManager.update();
+       }
+
+       /*
+        * INSTALLATION
+        */
+       /** Install a single url. Convenience method. */
+       public Bundle installUrl(String url) {
+               List<String> urls = new ArrayList<String>();
+               urls.add(url);
+               installUrls(urls);
+               return (Bundle) getBundlesByLocation().get(url);
+       }
+
+       /** Install the bundles at this URL list. */
+       public void installUrls(List<String> urls) {
+               Map<String, Bundle> installedBundles = getBundlesByLocation();
+               for (int i = 0; i < urls.size(); i++) {
+                       String url = (String) urls.get(i);
+                       installUrl(url, installedBundles);
+               }
+               refreshFramework();
+       }
+
+       /** Actually install the provided URL */
+       protected void installUrl(String url, Map<String, Bundle> installedBundles) {
+               try {
+                       if (installedBundles.containsKey(url)) {
+                               Bundle bundle = (Bundle) installedBundles.get(url);
+                               if (OsgiBootUtils.debug)
+                                       debug("Bundle " + bundle.getSymbolicName() + " already installed from " + url);
+                       } else if (url.contains("/" + SYMBOLIC_NAME_EQUINOX + "/")
+                                       || url.contains("/" + SYMBOLIC_NAME_OSGI_BOOT + "/")) {
+                               if (OsgiBootUtils.debug)
+                                       warn("Skip " + url);
+                               return;
+                       } else {
+                               Bundle bundle = bundleContext.installBundle(url);
+                               if (url.startsWith("http"))
+                                       OsgiBootUtils
+                                                       .info("Installed " + bundle.getSymbolicName() + "-" + bundle.getVersion() + " from " + url);
+                               else if (OsgiBootUtils.debug)
+                                       OsgiBootUtils.debug(
+                                                       "Installed " + bundle.getSymbolicName() + "-" + bundle.getVersion() + " from " + url);
+                               assert bundle.getSymbolicName() != null;
+                               // uninstall previous versions
+                               bundles: for (Bundle b : bundleContext.getBundles()) {
+                                       if (b.getSymbolicName() == null)
+                                               continue bundles;
+                                       if (bundle.getSymbolicName().equals(b.getSymbolicName())) {
+                                               Version bundleV = bundle.getVersion();
+                                               Version bV = b.getVersion();
+                                               if (bV == null)
+                                                       continue bundles;
+                                               if (bundleV.getMajor() == bV.getMajor() && bundleV.getMinor() == bV.getMinor()) {
+                                                       if (bundleV.getMicro() > bV.getMicro()) {
+                                                               // uninstall older bundles
+                                                               b.uninstall();
+                                                               OsgiBootUtils.debug("Uninstalled " + b);
+                                                       } else if (bundleV.getMicro() < bV.getMicro()) {
+                                                               // uninstall just installed bundle if newer
+                                                               bundle.uninstall();
+                                                               OsgiBootUtils.debug("Uninstalled " + bundle);
+                                                               break bundles;
+                                                       } else {
+                                                               // uninstall any other with same major/minor
+                                                               if (!bundleV.getQualifier().equals(bV.getQualifier())) {
+                                                                       b.uninstall();
+                                                                       OsgiBootUtils.debug("Uninstalled " + b);
+                                                               }
+                                                       }
+                                               }
+                                       }
+                               }
+                       }
+               } catch (BundleException e) {
+                       final String ALREADY_INSTALLED = "is already installed";
+                       String message = e.getMessage();
+                       if ((message.contains("Bundle \"" + SYMBOLIC_NAME_OSGI_BOOT + "\"")
+                                       || message.contains("Bundle \"" + SYMBOLIC_NAME_EQUINOX + "\""))
+                                       && message.contains(ALREADY_INSTALLED)) {
+                               // silent, in order to avoid warnings: we know that both
+                               // have already been installed...
+                       } else {
+                               if (message.contains(ALREADY_INSTALLED)) {
+                                       if (OsgiBootUtils.isDebug())
+                                               OsgiBootUtils.warn("Duplicate install from " + url + ": " + message);
+                               } else
+                                       OsgiBootUtils.warn("Could not install bundle from " + url + ": " + message);
+                       }
+                       if (OsgiBootUtils.debug && !message.contains(ALREADY_INSTALLED))
+                               e.printStackTrace();
+               }
+       }
+
+       /*
+        * START
+        */
+       public void startBundles() {
+               startBundles(System.getProperties());
+       }
+
+       public void startBundles(Properties properties) {
+               FrameworkStartLevel frameworkStartLevel = bundleContext.getBundle(0).adapt(FrameworkStartLevel.class);
+
+               // default and active start levels from System properties
+               Integer defaultStartLevel = Integer.parseInt(getProperty(PROP_OSGI_BUNDLES_DEFAULTSTARTLEVEL, "4"));
+               Integer activeStartLevel = Integer.parseInt(getProperty(PROP_OSGI_STARTLEVEL, "6"));
+
+               SortedMap<Integer, List<String>> startLevels = new TreeMap<Integer, List<String>>();
+               computeStartLevels(startLevels, properties, defaultStartLevel);
+               // inverts the map for the time being, TODO optimise
+               Map<String, Integer> bundleStartLevels = new HashMap<>();
+               for (Integer level : startLevels.keySet()) {
+                       for (String bsn : startLevels.get(level))
+                               bundleStartLevels.put(bsn, level);
+               }
+               for (Bundle bundle : bundleContext.getBundles()) {
+                       String bsn = bundle.getSymbolicName();
+                       if (bundleStartLevels.containsKey(bsn)) {
+                               BundleStartLevel bundleStartLevel = bundle.adapt(BundleStartLevel.class);
+                               Integer level = bundleStartLevels.get(bsn);
+                               if (bundleStartLevel.getStartLevel() != level || !bundleStartLevel.isPersistentlyStarted()) {
+                                       bundleStartLevel.setStartLevel(level);
+                                       try {
+                                               bundle.start();
+                                       } catch (BundleException e) {
+                                               OsgiBootUtils.error("Cannot mark " + bsn + " as started", e);
+                                       }
+                                       if (getDebug())
+                                               OsgiBootUtils.debug(bsn + " starts at level " + level);
+                               }
+                       }
+               }
+               frameworkStartLevel.setStartLevel(activeStartLevel, (FrameworkEvent event) -> {
+                       if (getDebug())
+                               OsgiBootUtils.debug("Framework event: " + event);
+                       int initialStartLevel = frameworkStartLevel.getInitialBundleStartLevel();
+                       int startLevel = frameworkStartLevel.getStartLevel();
+                       OsgiBootUtils.debug("Framework start level: " + startLevel + " (initial: " + initialStartLevel + ")");
+               });
+       }
+
+       private static void computeStartLevels(SortedMap<Integer, List<String>> startLevels, Properties properties,
+                       Integer defaultStartLevel) {
+
+               // default (and previously, only behaviour)
+               appendToStartLevels(startLevels, defaultStartLevel, properties.getProperty(PROP_ARGEO_OSGI_START, ""));
+
+               // list argeo.osgi.start.* system properties
+               Iterator<Object> keys = properties.keySet().iterator();
+               final String prefix = PROP_ARGEO_OSGI_START + ".";
+               while (keys.hasNext()) {
+                       String key = keys.next().toString();
+                       if (key.startsWith(prefix)) {
+                               Integer startLevel;
+                               String suffix = key.substring(prefix.length());
+                               String[] tokens = suffix.split("\\.");
+                               if (tokens.length > 0 && !tokens[0].trim().equals(""))
+                                       try {
+                                               // first token is start level
+                                               startLevel = Integer.parseInt(tokens[0]);
+                                       } catch (NumberFormatException e) {
+                                               startLevel = defaultStartLevel;
+                                       }
+                               else
+                                       startLevel = defaultStartLevel;
+
+                               // append bundle names
+                               String bundleNames = properties.getProperty(key);
+                               appendToStartLevels(startLevels, startLevel, bundleNames);
+                       }
+               }
+       }
+
+       /** Append a comma-separated list of bundles to the start levels. */
+       private static void appendToStartLevels(SortedMap<Integer, List<String>> startLevels, Integer startLevel,
+                       String str) {
+               if (str == null || str.trim().equals(""))
+                       return;
+
+               if (!startLevels.containsKey(startLevel))
+                       startLevels.put(startLevel, new ArrayList<String>());
+               String[] bundleNames = str.split(",");
+               for (int i = 0; i < bundleNames.length; i++) {
+                       if (bundleNames[i] != null && !bundleNames[i].trim().equals(""))
+                               (startLevels.get(startLevel)).add(bundleNames[i]);
+               }
+       }
+
+       /**
+        * Start the provided list of bundles
+        *
+        * @return whether all bundles are now in active state
+        * @deprecated
+        */
+       @Deprecated
+       public boolean startBundles(List<String> bundlesToStart) {
+               if (bundlesToStart.size() == 0)
+                       return true;
+
+               // used to monitor ACTIVE states
+               List<Bundle> startedBundles = new ArrayList<Bundle>();
+               // used to log the bundles not found
+               List<String> notFoundBundles = new ArrayList<String>(bundlesToStart);
+
+               Bundle[] bundles = bundleContext.getBundles();
+               long startBegin = System.currentTimeMillis();
+               for (int i = 0; i < bundles.length; i++) {
+                       Bundle bundle = bundles[i];
+                       String symbolicName = bundle.getSymbolicName();
+                       if (bundlesToStart.contains(symbolicName))
+                               try {
+                                       try {
+                                               bundle.start();
+                                               if (OsgiBootUtils.debug)
+                                                       debug("Bundle " + symbolicName + " started");
+                                       } catch (Exception e) {
+                                               OsgiBootUtils.warn("Start of bundle " + symbolicName + " failed because of " + e
+                                                               + ", maybe bundle is not yet resolved," + " waiting and trying again.");
+                                               waitForBundleResolvedOrActive(startBegin, bundle);
+                                               bundle.start();
+                                               startedBundles.add(bundle);
+                                       }
+                                       notFoundBundles.remove(symbolicName);
+                               } catch (Exception e) {
+                                       OsgiBootUtils.warn("Bundle " + symbolicName + " cannot be started: " + e.getMessage());
+                                       if (OsgiBootUtils.debug)
+                                               e.printStackTrace();
+                                       // was found even if start failed
+                                       notFoundBundles.remove(symbolicName);
+                               }
+               }
+
+               for (int i = 0; i < notFoundBundles.size(); i++)
+                       OsgiBootUtils.warn("Bundle '" + notFoundBundles.get(i) + "' not started because it was not found.");
+
+               // monitors that all bundles are started
+               long beginMonitor = System.currentTimeMillis();
+               boolean allStarted = !(startedBundles.size() > 0);
+               List<String> notStarted = new ArrayList<String>();
+               while (!allStarted && (System.currentTimeMillis() - beginMonitor) < defaultTimeout) {
+                       notStarted = new ArrayList<String>();
+                       allStarted = true;
+                       for (int i = 0; i < startedBundles.size(); i++) {
+                               Bundle bundle = (Bundle) startedBundles.get(i);
+                               // TODO check behaviour of lazs bundles
+                               if (bundle.getState() != Bundle.ACTIVE) {
+                                       allStarted = false;
+                                       notStarted.add(bundle.getSymbolicName());
+                               }
+                       }
+                       try {
+                               Thread.sleep(100);
+                       } catch (InterruptedException e) {
+                               // silent
+                       }
+               }
+               long duration = System.currentTimeMillis() - beginMonitor;
+
+               if (!allStarted)
+                       for (int i = 0; i < notStarted.size(); i++)
+                               OsgiBootUtils.warn("Bundle '" + notStarted.get(i) + "' not ACTIVE after " + (duration / 1000) + "s");
+
+               return allStarted;
+       }
+
+       /** Waits for a bundle to become active or resolved */
+       @Deprecated
+       private void waitForBundleResolvedOrActive(long startBegin, Bundle bundle) throws Exception {
+               int originalState = bundle.getState();
+               if ((originalState == Bundle.RESOLVED) || (originalState == Bundle.ACTIVE))
+                       return;
+
+               String originalStateStr = OsgiBootUtils.stateAsString(originalState);
+
+               int currentState = bundle.getState();
+               while (!(currentState == Bundle.RESOLVED || currentState == Bundle.ACTIVE)) {
+                       long now = System.currentTimeMillis();
+                       if ((now - startBegin) > defaultTimeout * 10)
+                               throw new Exception("Bundle " + bundle.getSymbolicName() + " was not RESOLVED or ACTIVE after "
+                                               + (now - startBegin) + "ms (originalState=" + originalStateStr + ", currentState="
+                                               + OsgiBootUtils.stateAsString(currentState) + ")");
+
+                       try {
+                               Thread.sleep(100l);
+                       } catch (InterruptedException e) {
+                               // silent
+                       }
+                       currentState = bundle.getState();
+               }
+       }
+
+       /*
+        * BUNDLE PATTERNS INSTALLATION
+        */
+       /**
+        * Computes a list of URLs based on Ant-like include/exclude patterns defined by
+        * ${argeo.osgi.bundles} with the following format:<br>
+        * <code>/base/directory;in=*.jar;in=**;ex=org.eclipse.osgi_*;jar</code><br>
+        * WARNING: <code>/base/directory;in=*.jar,\</code> at the end of a file,
+        * without a new line causes a '.' to be appended with unexpected side effects.
+        */
+       public List<String> getBundlesUrls() {
+               String bundlePatterns = getProperty(PROP_ARGEO_OSGI_BUNDLES);
+               return getBundlesUrls(bundlePatterns);
+       }
+
+       /**
+        * Compute a list of URLs to install based on the provided patterns, with
+        * default base url
+        */
+       public List<String> getBundlesUrls(String bundlePatterns) {
+               String baseUrl = getProperty(PROP_ARGEO_OSGI_BASE_URL, DEFAULT_BASE_URL);
+               return getBundlesUrls(baseUrl, bundlePatterns);
+       }
+
+       /** Implements the path matching logic */
+       public List<String> getBundlesUrls(String baseUrl, String bundlePatterns) {
+               List<String> urls = new ArrayList<String>();
+               if (bundlePatterns == null)
+                       return urls;
+
+//             bundlePatterns = SystemPropertyUtils.resolvePlaceholders(bundlePatterns);
+               if (OsgiBootUtils.debug)
+                       debug(PROP_ARGEO_OSGI_BUNDLES + "=" + bundlePatterns);
+
+               StringTokenizer st = new StringTokenizer(bundlePatterns, ",");
+               List<BundlesSet> bundlesSets = new ArrayList<BundlesSet>();
+               while (st.hasMoreTokens()) {
+                       String token = st.nextToken();
+                       if (new File(token).exists()) {
+                               String url = locationToUrl(baseUrl, token);
+                               urls.add(url);
+                       } else
+                               bundlesSets.add(new BundlesSet(token));
+               }
+
+               // find included
+               List<String> included = new ArrayList<String>();
+//             PathMatcher matcher = new AntPathMatcher();
+               for (int i = 0; i < bundlesSets.size(); i++) {
+                       BundlesSet bundlesSet = (BundlesSet) bundlesSets.get(i);
+                       for (int j = 0; j < bundlesSet.getIncludes().size(); j++) {
+                               String pattern = (String) bundlesSet.getIncludes().get(j);
+                               match(included, bundlesSet.getDir(), null, pattern);
+                       }
+               }
+
+               // find excluded
+               List<String> excluded = new ArrayList<String>();
+               for (int i = 0; i < bundlesSets.size(); i++) {
+                       BundlesSet bundlesSet = (BundlesSet) bundlesSets.get(i);
+                       for (int j = 0; j < bundlesSet.getExcludes().size(); j++) {
+                               String pattern = (String) bundlesSet.getExcludes().get(j);
+                               match(excluded, bundlesSet.getDir(), null, pattern);
+                       }
+               }
+
+               // construct list
+               for (int i = 0; i < included.size(); i++) {
+                       String fullPath = (String) included.get(i);
+                       if (!excluded.contains(fullPath))
+                               urls.add(locationToUrl(baseUrl, fullPath));
+               }
+
+               return urls;
+       }
+
+       /*
+        * DISTRIBUTION JAR INSTALLATION
+        */
+       public List<String> getDistributionUrls() {
+               String distributionUrl = getProperty(PROP_ARGEO_OSGI_DISTRIBUTION_URL);
+               String baseUrl = getProperty(PROP_ARGEO_OSGI_BASE_URL);
+               return getDistributionUrls(distributionUrl, baseUrl);
+       }
+
+       public List<String> getDistributionUrls(String distributionUrl, String baseUrl) {
+               List<String> urls = new ArrayList<String>();
+               if (distributionUrl == null)
+                       return urls;
+
+               DistributionBundle distributionBundle;
+               if (distributionUrl.startsWith("http") || distributionUrl.startsWith("file")) {
+                       distributionBundle = new DistributionBundle(distributionUrl);
+                       if (baseUrl != null)
+                               distributionBundle.setBaseUrl(baseUrl);
+               } else {
+                       // relative url
+                       if (baseUrl == null) {
+                               baseUrl = localCache;
+                       }
+
+                       if (distributionUrl.contains(":")) {
+                               // TODO make it safer
+                               String[] parts = distributionUrl.trim().split(":");
+                               String[] categoryParts = parts[0].split("\\.");
+                               String artifactId = parts[1];
+                               String version = parts[2];
+                               StringBuilder sb = new StringBuilder();
+                               for (String categoryPart : categoryParts) {
+                                       sb.append(categoryPart).append('/');
+                               }
+                               sb.append(artifactId).append('/');
+                               sb.append(version).append('/');
+                               sb.append(artifactId).append('-').append(version).append(".jar");
+                               distributionUrl = sb.toString();
+                       }
+
+                       distributionBundle = new DistributionBundle(baseUrl, distributionUrl, localCache);
+               }
+               // if (baseUrl != null && !(distributionUrl.startsWith("http") ||
+               // distributionUrl.startsWith("file"))) {
+               // // relative url
+               // distributionBundle = new DistributionBundle(baseUrl, distributionUrl,
+               // localCache);
+               // } else {
+               // distributionBundle = new DistributionBundle(distributionUrl);
+               // if (baseUrl != null)
+               // distributionBundle.setBaseUrl(baseUrl);
+               // }
+               distributionBundle.processUrl();
+               return distributionBundle.listUrls();
+       }
+
+       /*
+        * HIGH LEVEL UTILITIES
+        */
+       /** Actually performs the matching logic. */
+       protected void match(List<String> matched, String base, String currentPath, String pattern) {
+               if (currentPath == null) {
+                       // Init
+                       File baseDir = new File(base.replace('/', File.separatorChar));
+                       File[] files = baseDir.listFiles();
+
+                       if (files == null) {
+                               if (OsgiBootUtils.debug)
+                                       OsgiBootUtils.warn("Base dir " + baseDir + " has no children, exists=" + baseDir.exists()
+                                                       + ", isDirectory=" + baseDir.isDirectory());
+                               return;
+                       }
+
+                       for (int i = 0; i < files.length; i++)
+                               match(matched, base, files[i].getName(), pattern);
+               } else {
+                       PathMatcher matcher = FileSystems.getDefault().getPathMatcher(pattern);
+                       String fullPath = base + '/' + currentPath;
+                       if (matched.contains(fullPath))
+                               return;// don't try deeper if already matched
+
+                       boolean ok = matcher.matches(Paths.get(currentPath));
+                       // if (debug)
+                       // debug(currentPath + " " + (ok ? "" : " not ")
+                       // + " matched with " + pattern);
+                       if (ok) {
+                               matched.add(fullPath);
+                               return;
+                       } else {
+                               String newFullPath = relativeToFullPath(base, currentPath);
+                               File newFile = new File(newFullPath);
+                               File[] files = newFile.listFiles();
+                               if (files != null) {
+                                       for (int i = 0; i < files.length; i++) {
+                                               String newCurrentPath = currentPath + '/' + files[i].getName();
+                                               if (files[i].isDirectory()) {
+//                                                     if (matcher.matchStart(pattern, newCurrentPath)) {
+                                                       // FIXME recurse only if start matches ?
+                                                       match(matched, base, newCurrentPath, pattern);
+//                                                     } else {
+//                                                             if (OsgiBootUtils.debug)
+//                                                                     debug(newCurrentPath + " does not start match with " + pattern);
+//
+//                                                     }
+                                               } else {
+                                                       boolean nonDirectoryOk = matcher.matches(Paths.get(newCurrentPath));
+                                                       if (OsgiBootUtils.debug)
+                                                               debug(currentPath + " " + (ok ? "" : " not ") + " matched with " + pattern);
+                                                       if (nonDirectoryOk)
+                                                               matched.add(relativeToFullPath(base, newCurrentPath));
+                                               }
+                                       }
+                               }
+                       }
+               }
+       }
+
+       protected void matchFile() {
+
+       }
+
+       /*
+        * LOW LEVEL UTILITIES
+        */
+       /**
+        * The bundles already installed. Key is location (String) , value is a
+        * {@link Bundle}
+        */
+       public Map<String, Bundle> getBundlesByLocation() {
+               Map<String, Bundle> installedBundles = new HashMap<String, Bundle>();
+               Bundle[] bundles = bundleContext.getBundles();
+               for (int i = 0; i < bundles.length; i++) {
+                       installedBundles.put(bundles[i].getLocation(), bundles[i]);
+               }
+               return installedBundles;
+       }
+
+       /**
+        * The bundles already installed. Key is symbolic name (String) , value is a
+        * {@link Bundle}
+        */
+       public Map<String, Bundle> getBundlesBySymbolicName() {
+               Map<String, Bundle> namedBundles = new HashMap<String, Bundle>();
+               Bundle[] bundles = bundleContext.getBundles();
+               for (int i = 0; i < bundles.length; i++) {
+                       namedBundles.put(bundles[i].getSymbolicName(), bundles[i]);
+               }
+               return namedBundles;
+       }
+
+       /** Creates an URL from a location */
+       protected String locationToUrl(String baseUrl, String location) {
+               return baseUrl + location;
+       }
+
+       /** Transforms a relative path in a full system path. */
+       protected String relativeToFullPath(String basePath, String relativePath) {
+               return (basePath + '/' + relativePath).replace('/', File.separatorChar);
+       }
+
+       private void refreshFramework() {
+               Bundle systemBundle = bundleContext.getBundle(0);
+               FrameworkWiring frameworkWiring = systemBundle.adapt(FrameworkWiring.class);
+               frameworkWiring.refreshBundles(null);
+       }
+
+       /**
+        * Gets a property value
+        * 
+        * @return null when defaultValue is ""
+        */
+       public String getProperty(String name, String defaultValue) {
+               String value = bundleContext.getProperty(name);
+               if (value == null)
+                       return defaultValue; // may be null
+               else
+                       return value;
+       }
+
+       public String getProperty(String name) {
+               return getProperty(name, null);
+       }
+
+       /*
+        * BEAN METHODS
+        */
+
+       public boolean getDebug() {
+               return OsgiBootUtils.debug;
+       }
+
+       // public void setDebug(boolean debug) {
+       // this.debug = debug;
+       // }
+
+       public BundleContext getBundleContext() {
+               return bundleContext;
+       }
+
+       public String getLocalCache() {
+               return localCache;
+       }
+
+       // public void setDefaultTimeout(long defaultTimeout) {
+       // this.defaultTimeout = defaultTimeout;
+       // }
+
+       // public boolean isExcludeSvn() {
+       // return excludeSvn;
+       // }
+       //
+       // public void setExcludeSvn(boolean excludeSvn) {
+       // this.excludeSvn = excludeSvn;
+       // }
+
+       /*
+        * INTERNAL CLASSES
+        */
+
+}