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Editorial Team
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Asked: 2026-06-04T20:38:14+00:00

How can I programmatically know, in my web app, the username and password or

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How can I programmatically know, in my web app, the username and password or user role of the user who is currently logged into tomcat on which the app is deployed?

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1 Answer

  1. Editorial Team

    This information is available by HttpServletRequest and inherently thus also ExternalContext.

    The following methods are available:

    String username = externalContext.getRemoteUser();
UserPrincipal principal = externalContext.getUserPrincipal();
boolean admin = externalContext.isUserInRole("ADMIN");

    You cannot get the password in any way for security reasons.

    Note that the HttpServletRequest is available as #{request} in EL. So the following should also be possible:

    <p>Welcome, #{request.remoteUser}</p>

<h:panelGroup id="adminPanel" rendered="#{request.isUserInRole('ADMIN')}">
    ...
</h:panelGroup>
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