I simply use the instanceof operator and it works great. Tells me when LDAP server is down or Database is down etc etc
if (exception instanceof java.lang.NullPointerException) DO SOMETHING >From: [EMAIL PROTECTED] >Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]> >To: "Struts Users Mailing List" <[EMAIL PROTECTED]> >Subject: Re: JSP error >Date: Wed, 15 May 2002 16:02:14 -0400 > > > > > >Pete Serafin wrote: > > > > Is it possible for the JSP error directive to capture any other type of > > exceptions other than just javax.servlet.jsp.JspException. Im trying > > to catch any types of exceptions in my JSPs including Jasper and plain > > Exceptions, but Im not sure if this is possible. Has anyone does this > > without using scriplet coding? > >Based on the J2EE spec, JSPException is what you get. By definition, a >JSPException is what a "JSP Engine" must throw if it finds an error. Also >by definition, any JSP Tags - including the Struts tags - must throw >JSPException. > >That being said, there is a way to get at the actual error - one of the >JSPException methods is: > > public java.lang.Throwable getRootCause() > >which allows you to find the actual exception. > >So the way to have the "errorpage" directive be used to handle a variety of >different Exception's is to code an "errorpage.jsp" that inspects >exception.getRootCause() and makes processing decisions based on it. > >One Struts-oriented solution may be to create an ExceptionAction and design >an errorpage.jsp to automatically forward you there - carrying the >exception as a parameter in some way. Then if the errorpage machinery kicks >in, you may be able to have an Action class control the processing. This >would allow you to avoid in-line scripting and tightly control processing. > >Anyone see any problems with this approach? Anyone done anything like this? > > >FWIW - >Kevin > > >Here are a couple references: > > > >http://developer.java.sun.com/developer/onlineTraining/JSPIntro/exercises/ErrorHandling/ > > > >http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/jsp/JspException.html > > > > > > >--------------------------------------------------------------------------- >This e-mail message (including attachments, if any) is intended for the use >of the individual or entity to which it is addressed and may contain >information that is privileged, proprietary , confidential and exempt from >disclosure. If you are not the intended recipient, you are notified that >any dissemination, distribution or copying of this communication is >strictly prohibited. If you have received this communication in error, >please notify the sender and erase this e-mail message immediately. >--------------------------------------------------------------------------- > > >-- >To unsubscribe, e-mail: ><mailto:[EMAIL PROTECTED]> >For additional commands, e-mail: ><mailto:[EMAIL PROTECTED]> > _________________________________________________________________ Join the world�s largest e-mail service with MSN Hotmail. http://www.hotmail.com -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
