ex4_3.txt

j2ee core design patterns

Example 4.3 Generate and Store Token

/**
* Save a new transaction token in the 
* user's current session, creating
* a new session if necessary.
*
* @param request The servlet request we are processing
*/
protected void saveToken(HttpServletRequest request) {

HttpSession session = request.getSession();
String token = generateToken(request);
if (token != null)
  session.setAttribute(TRANSACTION_TOKEN_KEY, token);
}
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