protected boolean isTokenValid(javax.servlet.http.HttpServletRequest request)
Return true if there is a transaction token stored in the user's current session, and the value submitted as a request parameter with this action matches it.
protected void saveToken(javax.servlet.http.HttpServletRequest request)
Save a new transaction token in the user's current session, creating a new session if necessary.
protected void resetToken(javax.servlet.http.HttpServletRequest request)
Reset the saved transaction token in the user's session.