"Richard S. Hall" <[EMAIL PROTECTED]> writes: > The Felix.start() method accepts a list of BundleActivator > instances. These passed in activator instances effectively become > part of the system bundle and their start()/stop() methods will be > given the system bundle's context so that they can install bundles, > register services, etc.
Oh, I completely missed that. Thanks for pointing it out. Now Felix makes a lot more sense to me, especially from the point of view of embedding it in an application. On the topic of providing an activator list to Felix.start(), I notice that SystemBundleActivator's start() method starts up all the BundleActivators in the order they fall in the m_activatorList list. In SystemBundle's constructor, it /appends/ activators for PackageAdmin, StartLevel, and URLHandler services to the list provided by the caller to Felix.start(). This means that SystemBundleActivator.start() starts up the user-provided bundles (or just BundleActivators) before these three (for now) system-provided BundleActivators. While I understand that bundles must expect services they rely on to come and go, it might make for an easier start up if the user-provided BundleActivators were started /after/ the system-provided ones. That is assuming that any user-provided bundles would rely on services or capabilities provided by the PackageAdmin, StartLevel, or URLHandler BundleActivators. In code, prepending in reverse order: ,----[ SystemBundle.SystemBundle(Felix, BundleInfo, List) ] | // Add the bundle activator for the URL Handlers service. | activatorList.add(0, new URLHandlersActivator(felix)); | | // Add the bundle activator for the start level service. | activatorList.add(0, new StartLevelActivator(felix)); | | // Add the bundle activator for the package admin service. | activatorList.add(0, new PackageAdminActivator(felix)); `---- Or, if the shuffling around of array elements is onerous, one could use a LinkedList or write it this way, appending the provided list to the system-built list: ,----[ SystemBundle.SystemBundle(Felix, BundleInfo, List) ] | m_activatorList = new ArrayList(3 + | null == activatorList ? 0 : | activatorList.length); | | // Add the bundle activator for the package admin service. | m_activatorList.add(new PackageAdminActivator(felix)); | | // Add the bundle activator for the start level service. | m_activatorList.add(new StartLevelActivator(felix)); | | // Add the bundle activator for the URL Handlers service. | m_activatorList.add(new URLHandlersActivator(felix)); | | if (activatorList != null) | m_activatorList.addAll(activatorList); `---- -- Steven E. Harris
