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http://issues.apache.org/bugzilla/show_bug.cgi?id=28465 Cannot use jsp error pages from servlets [EMAIL PROTECTED] changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|INVALID | ------- Additional Comments From [EMAIL PROTECTED] 2004-04-20 07:01 ------- Using error pages defined in web.xml <error-page> -element is not really an option for me. I need to use different error pages depending on the location of the page that generated the exception. Basically I have a dispatcher that searches for the correct error page from the parent directories of the page that generated the exception. Use of the standard attribute (javax.servlet.error.exception) enables my error pages to take advantage of the standard jsp features such as having the implicit exception object defined in my error pages and the possibility to explicitly select the error page to be used by defining the errorPage page directive. Invoking jsp error pages from servlets, dispatchers and such by first setting the standard attribute and then forwarding seems to be a common practise anyway. I have seen numerous examples where this has been done. For example the java pet store example (both version 1.3.2 from http://java.sun.com/developer/releases/petstore/ and version 1.4 that comes with j2ee 1.4) contains a servlet called com.sun.j2ee.blueprints.waf.controller.web.MainServlet which on error conditions sets the "javax.servlet.jsp.jspException" attribute and uses a dispatcher to forward to the error page it selects. To my understanding the pet store example is supposed to provide best practice guidelines. >From the petstore: private void doProcess(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { // set the locale of the user to default if not set if (request.getSession().getAttribute(WebKeys.LOCALE) == null) { request.getSession().setAttribute(WebKeys.LOCALE, defaultLocale); } try { getRequestProcessor().processRequest(request); getScreenFlowManager().forwardToNextScreen(request,response); } catch (Throwable ex) { String className = ex.getClass().getName(); String nextScreen = getScreenFlowManager().getExceptionScreen(ex); // put the exception in the request request.setAttribute("javax.servlet.jsp.jspException", ex); if (nextScreen == null) { // send to general error screen ex.printStackTrace(); throw new ServletException("MainServlet: unknown exception: " + className); } context.getRequestDispatcher(nextScreen).forward(request, response); } --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
