@Override
  public void registerPlugin(String pluginName, Properties pluginProps) {
    Plugin plugin = null;
    switch (pluginName) {
      case "logOperations":
        plugin = new LogOperationsPlugin();
        break;
      case "topSites":
        plugin = new TopSitesPlugin();

        break;
      case "favourites":
        plugin = new FavouritesPlugin();
        break;
      case "cosmSensors":
        plugin = new CosmSensorsPlugin();
        break;
      case "news":
        plugin = new NewsPlugin();
        break;
      default:
        plugin = new PluginImpl();
        break;
    }
    plugin.register(pluginName, pluginProps);
    plugins.add(plugin);
  }
 @Override
 public boolean view(String pluginName) {
   Plugin plugin = getPlugin(pluginName);
   if (plugin != null) {
     return plugin.view();
   }
   return false;
 }
 @Override
 public boolean unload(String pluginName) {
   Plugin plugin = getPlugin(pluginName);
   if (plugin != null) {
     plugin.unload();
     return plugin.isLoaded();
   }
   return false;
 }
 @Override
 public Plugin getPlugin(String pluginName) {
   for (Plugin plugin : plugins) {
     if (plugin.getName().equalsIgnoreCase(pluginName)) {
       return plugin;
     }
   }
   return null;
 }