protected void loadUrlRewriter(FilterConfig filterConfig) throws ServletException {
  try {
    loadUrlRewriterLocal();
  }
 catch (  Throwable e) {
    log.error(e);
    throw new ServletException(e);
  }
}

protected void loadUrlRewriter ( FilterConfig filterConfig ) throws ServletException { try { loadUrlRewriterLocal ( ) ; } catch ( Throwable e ) { log . error ( e ) ; throw new ServletException ( e ) ; } }
separate from init so that it can be overidden .
