How to perform something after authentication?

[Iran Marcius <ir...@isic.com.br>]

Hi. I'm using Struts with velocity-tools in tomcat-4.1.12. I got a
JDBCRealm which works uses BASIC authentication.

When a user authenticates in this realm, I need to load all his
preferences from database. How could I do that? Should I extend
ActionServlet and redefine some method ("process" or
"processPreprocess", for example)?

Could someone give me a hint about that?

Thanx in advance.

iran


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Re: How to perform something after authentication?

[Gemes Tibor <ge...@regens.hu>]

2002. november 29. 11:45 dátummal Iran Marcius ezt írtad:

> Could someone give me a hint about that?

Create a filter, which check wheter the preferences are loaded and stored into 
session. If not, load them and store:

  public void doFilter(
      ServletRequest req,
      ServletResponse resp,
      FilterChain chain)

	HttpServletRequest request = (HttpServletRequest)req;

        javax.servlet.http.HttpSession session = request.getSession();

        UserPrefs prefs = (UserPrefs) 
session.getAttribute(Constants.USER_PREFS);
        if (prefs == null ) {
          String username= request.getUserPrincipal().getName();
          prefs = loadUsePrefs(username);
	  session.setAttribute(Constants.USER_PREFS, prefs);
	}	
	chain.doFilter(req, resp);
  }


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