CICS Transaction Gateway V5 The WebSphere ... - IBM Redbooks

366 CICS Transaction Gateway V5
catch (Throwable t)
{
// exception occured, set exception message in request with timestamp
String nowStr = "";
try
{
SimpleDateFormat sdf = (SimpleDateFormat)DateFormat.getTimeInstance();
sdf.applyPattern("MM/dd/yy HH:mm:ss:SSS");
nowStr = sdf.format(new Date());
}
catch(ClassCastException ex2)
{
// no SimpleDateFormat instance for this locale
}
// format with Date toString
nowStr = (new Date()).toString();
}
request.setAttribute(attrErrorException, nowStr + " : " + t);
// change jsp to use to the error jsp
jsp = jspError;
Figure B-28 Handling exceptions in the execute() method
The final section of code in the processRequest() method forwards to the
appropriate JSP, set in the instance variable jsp (Figure B-29).
finally
{
// route to jsp
ServletContext servletContext = getServletContext();
RequestDispatcher dispatcher = servletContext.getRequestDispatcher(jsp);
dispatcher.forward(request, response);
}
Figure B-29 Routing to a JSP
We get the ServletContext object that represents the current request and
response. We then get the RequestDispatcher object for the selected JSP from
the ServletContext. The forward() method is called on the RequestDispatcher,
passing in the HttpRequest and HttpResponse. This causes the request to be
forwarded to the JSP, with the objects representing details of the session. The
JSP will then generate the response HTML.