Tomcat 4 implements the servlet2.3 spec, although I'm not sure the spec itself is final already.
And Tomcat 4 runs fine on jdk1.3, so I don't suppose they (and thus the spec) use the jdk1.4 features. tomK > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: vrijdag 16 november 2001 12:26 > To: Struts Developers List > Subject: RE: Exception handling --- suggestion for > improvements ---- (e.g., templatetag masks original > exception) correction in sample code > > > > Ahh, oops. > > Or, use the servlet 2.3 API when it comes out (anyone know if > that API uses > the new Java 1.4 feature?). > > M > > > > > > > "Tom Klaasen > > > (TeleRelay)" To: "Struts > Developers List" <[EMAIL PROTECTED]> > > <tom.klaasen@tele cc: > > > relay.com> Subject: RE: > Exception handling --- suggestion for improvements ---- > (e.g., template tag masks > original > exception) correction in sample code > > 11/16/2001 03:33 > > > PM > > > Please respond to > > > "Struts > > > Developers List" > > > > > > > > > > > > > OK, my mistake, this seems to be valid only for servlet 2.3 spec, not > 2.2. Servlet 2.2 has no such feature whatsoever. > > For my defense, I can say that Sun should use the @since tag > more often > ;) > > tomK > > > > -----Original Message----- > > From: Tom Klaasen (TeleRelay) > > Sent: vrijdag 16 november 2001 9:49 > > To: Struts Developers List > > Subject: RE: Exception handling --- suggestion for > > improvements ---- (e.g., template tag masks original > > exception) correction in sample code > > > > > > Maybe I'll have to disappoint you about constructing a new Exception > > class. > > Did you have a look at > > http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/js > > p/JspExcep > > tion.html#JspException(java.lang.String,%20java.lang.Throwable > > ) ? Looks > > to me this does _exactly_ what you're trying to do. > > > > However, I agree that Struts should not call new > > JspException(e.getMessage()), but new JspException("Some intelligent > > message", e); instead. This leaves the decision of what to > display to > > the programmer. > > > > tomK > > > > > > > > > -----Original Message----- > > > From: Rick Hightower [mailto:[EMAIL PROTECTED]] > > > Sent: vrijdag 16 november 2001 9:24 > > > To: Struts Developers List > > > Subject: Exception handling --- suggestion for improvements > > > ---- (e.g., template tag masks original exception) correction > > > in sample code > > > > > > > > > > > > We have been using struts for a good while. We really dig the > > > framework, > > > but... > > > > > > Often times the struts tags catch the original exception (e.g., > > > ClassCastException), and then throw a JspException; thus, > losing the > > > original stack trace. This hides\masks the original > > > exception. Hiding the > > > orginal stack trace makes it harder to debug the problem. > > > > > > I wrote a JSPWrapperException that preserves the orginal > > > stack trace for > > > debugging. > > > JSPWrapperException extends JspWrapper; however, like > > > ServletException, it > > > captures the original stack trace and displays it for > > > debugging, i.e., the > > > JSPWrapperException prints out the original stack trace of > > > the original > > > exception. This is a real boon for debugging. > > > > > > I modified 50 or so files in our copy of the struts code > base (a 1.0 > > > derivative with some bug fixes and extra error handing) to use the > > > JSPWrapperException instead of the JspException. > > > > > > It cost about an hour to make the changes, but I feel it will > > > save us hours > > > of debugging in the future. > > > > > > There is an ant build file with struts so making the changes > > > and creating > > > struts.jar was easy. > > > > > > > > > > > > I search the struts code base for code like this.... > (example code) > > > > > > try{ > > > } > > > catch(XYZException e){ > > > throw new JspException(e.getMessage()); > > > } > > > > > > to code that looks like this > > > try{ > > > } > > > catch(XYZException e){ > > > throw new JspWrapperException(e, e.getMessage()); > > > } > > > > > > > > > BTW Here is the code for JspWrapperException.... > > > > > > Enjoy..... > > > > > > /* > > > * JspWrapperException.java > > > * > > > * Created on November 15, 2001, 11:14 PM > > > */ > > > > > > package org.apache.struts.util; > > > import javax.servlet.jsp.JspException; > > > > > > /** > > > * > > > * @author rick > > > */ > > > public class JspWrapperException extends JspException { > > > > > > Exception e; > > > > > > /** > > > * @param Exception e > > > * @param String message > > > */ > > > public JspWrapperException(Exception e, String message) { > > > super(message); > > > this.e = e; > > > } > > > > > > /** > > > */ > > > public void printStackTrace () { > > > super.printStackTrace(); > > > String sep = System.getProperty("line.separator", "\r\n"); > > > if (e != null) { > > > System.err.println("--------------- extended Exception > > > nest ----------- "); > > > e.printStackTrace(); > > > } > > > } > > > > > > /** > > > * @param ps > > > */ > > > public void printStackTrace (java.io.PrintStream ps) { > > > super.printStackTrace(ps); > > > String sep = System.getProperty("line.separator", "\r\n"); > > > if (e != null) { > > > ps.println("--------------- extended Exception > > > nest ----------- > > > "); > > > e.printStackTrace(ps); > > > } > > > } > > > > > > /** > > > * @param pw > > > */ > > > public void printStackTrace (java.io.PrintWriter pw) { > > > super.printStackTrace(pw); > > > String sep = System.getProperty("line.separator", "\r\n"); > > > // > > > //Nested exception > > > if (e != null) { > > > pw.println("--------------- extended Exception > > > nest ----------- > > > "); > > > e.printStackTrace(pw); > > > } > > > } > > > > > > /** > > > * @return > > > */ > > > public String getMessage () { > > > StringBuffer message = new StringBuffer(150); > > > message.append(super.getMessage()); > > > > > > // > > > //add Line separator > > > String sep = System.getProperty("line.separator", "\r\n"); > > > message.append(sep); > > > > > > // > > > //Add the nested exception > > > if (e != null) { > > > message.append(e.getMessage()); > > > //char = props["line.separator"] > > > } > > > return message.toString(); > > > } > > > } > > > > > > > > > > > > Rick Hightower > > > Director of Development > > > eBlox, Inc. > > > > > > Check out our new website! > > > www.eblox.com > > > > > > Contact Info: > > > eBlox Tucson > > > phone: 520-615-9345 x103 > > > fax: 520-529-5774 > > > > > > Rick's stuff: > > > http://www.eblox.com/people_detail.php?id=52 > > > http://www.geocities.com/rick_m_hightower/ > > > http://www.brainbench.com/transcript.jsp?pid=2351036 > > > > > > > > > -- > > > To unsubscribe, e-mail: > > > <mailto:struts-dev-> [EMAIL PROTECTED]> > > > For > > > additional commands, > > > e-mail: <mailto:[EMAIL PROTECTED]> > > > > > > > > > > > > -- > > > To unsubscribe, e-mail: > > > <mailto:struts-dev-> [EMAIL PROTECTED]> > > > For > > > additional commands, > > > e-mail: <mailto:[EMAIL PROTECTED]> > > > > > > > > > > -- > > To unsubscribe, e-mail: > > <mailto:struts-dev-> [EMAIL PROTECTED]> > > For > > additional commands, > > e-mail: <mailto:[EMAIL PROTECTED]> > > > > > > -- > To unsubscribe, e-mail: > <mailto:struts-dev-> [EMAIL PROTECTED] > > > For > additional commands, > e-mail: <mailto:[EMAIL PROTECTED] > > > > > > > > > -- > To unsubscribe, e-mail: > <mailto:struts-dev-> [EMAIL PROTECTED]> > For > additional commands, > e-mail: <mailto:[EMAIL PROTECTED]> > > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
