Re: [platform-core-dev] Dynamic Plug-in

[Jeff McAffer <Jeff_McAffer@xxxxxxxxxx>]

After doing this if you look in the
OSGi console (run with -console) and do an "ss", is your bundle
there?  Is it RESOLVED?  Doing the refreshPackages will tell
us to resolve.  As a result, the plugin.xml willbe parsed by the registry
and the elements added.  A registry change event will then be broadcast.
 From there on it is up to the components (e.g., UI) to listen and
do the right thing.

Jeff

Scott Fairbrother <scottf@xxxxxxxxxx>
Sent by: platform-core-dev-admin@xxxxxxxxxxx

06/01/2004 02:30 PM

Please respond to
platform-core-dev

To	platform-core-dev@xxxxxxxxxxx
cc
Subject	[platform-core-dev] Dynamic Plug-in

I'm trying to roll my own configurator, that will load a bundle(s).  I
think I'm getting through the load process clean but the bundles extensions,
menus, views, help, contributions are not updated in the UI.  Is there
some trick to forcing the framework to parse the new plug-in stuff dynamically.

Here is a simplified bit of code, gleaned from the update ConfigurationActivator.


 public void run(IAction action) { 
    List toRefresh = getUnresolvedBundles(); //Get all unresolved
bundles 
    Bundle target; 
    try { 
      URL bundleURL = new URL( 
          "reference:file:"
              + "D:/I0529/JDG2EBonusPack/plugins/com.ibm.jdg2e.mini.workplace.bonus_pack_3.0.0");
      target = ConfiguratorPlugin 
          .getDefault() 
          .getPluginContext()
          .installBundle(
              "D:/I0529/eclipse/workspace/com.ibm.jdg2e.mini.workplace.bonus_pack/",
              bundleURL.openStream());
      toRefresh.add(target); // any new bundle should be
refreshed as well 
      refreshPackages((Bundle[]) toRefresh
          .toArray(new Bundle[toRefresh.size()]));
//refresh all the bundles 
      // specified and their 
      // dependents. 
    } catch (Exception e) { 
      e.printStackTrace(); 
    } 
    MessageDialog.openInformation(window.getShell(),
        "Configurator Plug-in", "Bonus
pack bundle was added"); 
  } 
  private List getUnresolvedBundles() { 
    Bundle[] allBundles = ConfiguratorPlugin.getDefault()
        .getPluginContext().getBundles();
    List unresolved = new ArrayList(); 
    for (int i = 0; i < allBundles.length; i++)
      if (allBundles[i].getState() == Bundle.INSTALLED)
        unresolved.add(allBundles[i]);
    return unresolved; 
  } 
  private void refreshPackages(Bundle[] bundles) {
    if (bundles.length == 0) 
      return; 
    ServiceReference packageAdminRef = ConfiguratorPlugin
        .getDefault().getPluginContext().getServiceReference(
            PackageAdmin.class.getName());
    PackageAdmin packageAdmin = null; 
    if (packageAdminRef != null) { 
      packageAdmin = (PackageAdmin) ConfiguratorPlugin
          .getDefault().getPluginContext().getService(
              packageAdminRef);
      if (packageAdmin == null) 
        return; 
    } 

    final boolean[] flag = new boolean[]{false};
    FrameworkListener listener = new FrameworkListener() {
      public void frameworkEvent(FrameworkEvent event) {
        if (event.getType() == FrameworkEvent.PACKAGES_REFRESHED)
          synchronized (flag) {
            flag[0] = true;
            flag.notifyAll();
          } 
      } 
    }; 
    ConfiguratorPlugin.getDefault().getPluginContext()
        .addFrameworkListener(listener);
    packageAdmin.refreshPackages(bundles);
    synchronized (flag) { 
      while (!flag[0]) { 
        try { 
          flag.wait(); 
        } catch (InterruptedException e) {
        } 
      } 
    } 
    ConfiguratorPlugin.getDefault().getPluginContext()
        .removeFrameworkListener(listener);
    ConfiguratorPlugin.getDefault().getPluginContext()
        .ungetService(packageAdminRef);
  } 


    

Thanks,
Scott Fairbrother
Eclipse/WebSphere Studio Jumpstart Team
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Apex , NC 27502

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