Exception Handling with Custom Tags/Exceptions

Question

Hello all --
          I'm looking for some guidance in handling Custom errors in my app. I can't
          seem to find the message string of my custom exception when trying to call
          my JSP Error page. I'm consistently getting:
          javax.servlet.jsp.JspTagException: runtime failure in custom tag
          'CalendarHandler' .
          I am using custom JSP tag libraries to process logic on my EJBs. When I
          reach an error in business logic I raise a custom exception and propogate
          this back up to doStartTag:
          public int doStartTag() throws JspException {
          CalendarProcessor cp = new CalendarProcessor();
          try {
          String eventAction = getEventID();
          // pageContext contains information for the JSP;
          // Initialize the page with the current context and session
          cp.init(pageContext.getServletContext(), pageContext.getSession());
          HttpServletRequest req = (HttpServletRequest)pageContext.getRequest();
          cp.processRequest(req, eventAction );
          } catch (CalendarException ce) {
          throw new JspException(ce.getMessage());
          return SKIP_BODY;
          Then, in my JSP, I am enclosing the TagHandler in a try...catch block; I
          can't catch CalendarException because it is Throwable and conflicts with
          JspException.
          <% try { %>
          <gtc:CalendarHandler eventID="updatecal"/>
          <% } catch (Exception e) {
          throw e instanceof JspException ? (JspException) e : new
          JspTagException(e.getMessage());
          %>
          many thanks in advance!
          s.
          

Answer 1

I could not tell what the problem was that you were describing. Could you
          clarify?
          Cameron Purdy
          [email protected]
          http://www.tangosol.com
          WebLogic Consulting Available
          "Shari" <[email protected]> wrote in message
          news:[email protected]...
          > Hello all --
          >
          > I'm looking for some guidance in handling Custom errors in my app. I can't
          > seem to find the message string of my custom exception when trying to call
          > my JSP Error page. I'm consistently getting:
          > javax.servlet.jsp.JspTagException: runtime failure in custom tag
          > 'CalendarHandler' .
          >
          > I am using custom JSP tag libraries to process logic on my EJBs. When I
          > reach an error in business logic I raise a custom exception and propogate
          > this back up to doStartTag:
          >
          > public int doStartTag() throws JspException {
          >
          > CalendarProcessor cp = new CalendarProcessor();
          >
          > try {
          >
          > String eventAction = getEventID();
          >
          > // pageContext contains information for the JSP;
          >
          > // Initialize the page with the current context and session
          >
          > cp.init(pageContext.getServletContext(), pageContext.getSession());
          >
          > HttpServletRequest req = (HttpServletRequest)pageContext.getRequest();
          >
          > cp.processRequest(req, eventAction );
          >
          > } catch (CalendarException ce) {
          >
          > throw new JspException(ce.getMessage());
          >
          > }
          >
          > return SKIP_BODY;
          >
          > }
          >
          > Then, in my JSP, I am enclosing the TagHandler in a try...catch block; I
          > can't catch CalendarException because it is Throwable and conflicts with
          > JspException.
          >
          > <% try { %>
          >
          > <gtc:CalendarHandler eventID="updatecal"/>
          >
          > <% } catch (Exception e) {
          >
          > throw e instanceof JspException ? (JspException) e : new
          > JspTagException(e.getMessage());
          >
          > }
          >
          > %>
          >
          > many thanks in advance!
          >
          > s.
          >
          >
          >
          >
          >
          >
          >