ommon base class
(<code>AuthenticatorBase</code>), which is configured by setting the
following JavaBeans properties (with default values in square brackets):</p>
<ul>
<li><b>cache</b> - Should we cache authenticated Principals (thus avoiding
    per-request lookups in our underlying <code>Realm</code>) if this request
    is part of an HTTP session?  [true]</li>
<li><b>debug</b> - Debugging detail level for this component.  [0]</li>
</ul>

<p>The standard authentication methods that are currently provided 