Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO?
thank you very much, Yuniar :) - Original Message - From: Yuniar Setiawan [EMAIL PROTECTED] To: Struts Users Mailing List user@struts.apache.org Sent: Wednesday, March 23, 2005 6:57 PM Subject: Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO? There is a good example at http://www.reumann.net/struts/ibatisLesson1.do about this. download the sample war and look inside. cheers On Wed, 23 Mar 2005 17:31:53 +0700, Pham Anh Tuan [EMAIL PROTECTED] wrote: Hi, I don't know how to catch and process errors in Struts + iBatis + DAO. Anyone here can help me, plz :( thank for ur reading. Tuan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO?
Agood way that i have found out was to define a BaseExceptionHandler.java class
snip
public final class BaseExceptionHandler extends ExceptionHandler {
public ActionForward execute(Exception ex, ExceptionConfig ae,
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws ServletException {
ActionErrors errors = (ActionErrors)
request.getAttribute(Globals.ERROR_KEY);
if (errors != null) {
return null;
}
ActionForward forward =
super.execute(ex, ae, mapping, form, request, response);
// get user that is logged in from session
// create a timestamp (String)
StackTraceElement[] ste = ex.getStackTrace();
StringBuffer sbStackTrace = new StringBuffer();
for (int i = 0; iste.length; i++) {
sbStackTrace.append(ste[i].toString());
sbStackTrace.append(\n);
}
// create a unique error code from userName_Timestamp
// Save the error code in the session
if ( session != null ){
session.setAttribute(errorId, sb.toString());
}
//return new ActionForward(ae.getPath());
return forward;
} // end execute
}
/ snip
Now in your struts-config.xml have this in there
global-exceptions
exception key=errors.technical.difficulty
path=/jsp/systemError.jsp type=java.lang.Exception
handler=com.path.to.my.class.BaseExceptionHandler/
/global-exceptions
and aboviously errors.technical.difficulty would be in the resource
properties file, waht ever message you want to display
Now in the systemError.jsp, display the errorId
This is a catch all error, design pattern..
When a user reports a error ask for the error Code on the screen and
then you check your log4J file for that error code to debug.
hope that helps :)
On Thu, 24 Mar 2005 15:04:05 +0700, Pham Anh Tuan [EMAIL PROTECTED] wrote:
thank you very much, Yuniar :)
- Original Message -
From: Yuniar Setiawan [EMAIL PROTECTED]
To: Struts Users Mailing List user@struts.apache.org
Sent: Wednesday, March 23, 2005 6:57 PM
Subject: Re: [HELP] How could I catch and process Errors in Struts + iBatis
+ DAO?
There is a good example at
http://www.reumann.net/struts/ibatisLesson1.do about this. download
the sample war and look inside.
cheers
On Wed, 23 Mar 2005 17:31:53 +0700, Pham Anh Tuan [EMAIL PROTECTED]
wrote:
Hi,
I don't know how to catch and process errors in Struts + iBatis + DAO.
Anyone here can help me, plz :(
thank for ur reading.
Tuan
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Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO?
Folashade Adeyosoye wrote the following on 3/24/2005 10:59 AM: Agood way that i have found out was to define a BaseExceptionHandler.java class Yes my Struts apps have this also. Actually I no longer catch any Exceptions in my Actions and let this Base class handle it all. Makes your Actions much cleaner in my opinion. So in my struts-config I have something like: global-exceptions exception handler=com.foo.bar.AppExceptionHandler key=error.general path=/WEB-INF/jsp/exception.jsp type=java.lang.Exception/ /global-exceptions Any exceptions that make it to the Action will propogate to the above handler. Then you can do additional logging and forward to a nicer error display page. -- Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO?
Yuniar Setiawan wrote the following on 3/23/2005 6:57 AM: There is a good example at http://www.reumann.net/struts/ibatisLesson1.do about this. download the sample war and look inside. Actually as Leon pointed out to me, my example isn't that good for Exception handling. (Sorry I wrote it fast and was lazy:) Do NOT follow that example as a 'best practices' for Exception handling - it's anyting but good for that. (The example is more for a demo of using the basics of a struts-iBATIS-Dao integration - but I definitely cut corners in places). One example is in the Action, even though I use a service class (which really is a facade if I have my design pattern names correct), I don't catch a ServiceException in my Action but instead I catch a DAOException. I think it best to insulate yourself in the Action from anything related to the DAO and instead just catch some ServiceException(maybe call it DataAcessFacade vs service would be better also). -- Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[HELP] How could I catch and process Errors in Struts + iBatis + DAO?
Hi, I don't know how to catch and process errors in Struts + iBatis + DAO. Anyone here can help me, plz :( thank for ur reading. Tuan
Re: [HELP] How could I catch and process Errors in Struts + iBatis + DAO?
There is a good example at http://www.reumann.net/struts/ibatisLesson1.do about this. download the sample war and look inside. cheers On Wed, 23 Mar 2005 17:31:53 +0700, Pham Anh Tuan [EMAIL PROTECTED] wrote: Hi, I don't know how to catch and process errors in Struts + iBatis + DAO. Anyone here can help me, plz :( thank for ur reading. Tuan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
