Uninstalling additional files associated with JWS applications

Question

I have a JWS application that works fine however I would to be able to optionally remove or delete the work directory and files which are not in the JWS cache. Is there a way of doing this?

Answer 1

I couldn't find a direct way of doing this. But I found a workaround. I created a uninstaller jnlp so that when it is uninstalled it deletes the resources.
Uninstaller jnlp Example:
<?xml version="1.0" encoding="utf-8"?>
<jnlp
     spec="1.0+"
     codebase="http://...."
     href="uninstall.jnlp">
     <security>
          <all-permissions/>
     </security>
     <resources>
          <j2se version="1.5+"/>
          <jar href="/lib/uninstall.jar"/>
     </resources>
     <installer-desc/>
</jnlp>
Main jnlp
<jnlp
     spec="1.0+"
     codebase="http://..."
     href="launch.jnlp">
     <resources>
          <j2se version="1.5+"/>
          <jar href="/lib/main.jar"/>
          <extension href="uninstall.jnlp"/>
     </resources>
     <application-desc/>
</jnlp>When a <installer-desc/> is installed its main will be called with "install" and when its uninstalled main will be called with something else.
Here is a sample main for uninstall.jar:
     public static void main(String[] args) {
          javax.jnlp.ExtensionInstallerService extensionInstallerService = null;
          try {
               extensionInstallerService = (javax.jnlp.ExtensionInstallerService)javax.jnlp.ServiceManager.lookup("javax.jnlp.ExtensionInstallerService");
          } catch (javax.jnlp.UnavailableServiceException ex) {}
               if (args.length == 0 || !"install".equals(args[0])) {
                    ApplicationServices.deleteLogDir();
                    ApplicationServices.getInstance().setStartup(false);
                    try {
                         Preferences prefs = Preferences.userNodeForPackage(Uninstall.class);                              
                         Preferences parentPrefs = prefs.parent();
                         prefs.removeNode();
                         removeIfEmpty(parentPrefs);
                    } catch (BackingStoreException ex) {
                         ex.printStackTrace();
          if (extensionInstallerService != null) {
               extensionInstallerService.installSucceeded(false);
          System.exit(0);               
     }I think it would be nice if this functionality could be described in the application jnlp so the main on the original application could get the message and handle any cleanup it needed to do instead of a separate extension jnlp