registry.getConfiguration().setProperty(LAST_UPDATE, System.currentTimeMillis() +""); registry.getConfiguration().persist(new String[] {LAST_UPDATE});
    public void execute(Map arguments, Registry registry, Output output)                 throws Exception    {        validateArguments(arguments, new String[] {ARG_URL});        String url = (String) arguments.get(ARG_URL);        EntryStore store = (EntryStore) registry.getPlugin("store");        int numDeleted = store.deleteEntry( new URL(url) );        output.addOutputMessage("Deleted "+numDeleted+" entry with URL "+url);    }