 requests will be
           logged only if <code>ServletRequest.getAttribute()</code> is
           null. For example, if this value is set to
           <code>junk</code>, then a particular request will only be logged
           if <code>ServletRequest.getAttribute("junk") == null</code>.
           The use of Filters is an easy way to set/unset the attribute
           in the ServletRequest on many different requests.
        </p>
      </td></tr><tr><td><code class="attributeName">condition</code></td><