Re: Handling the exceptions in struts

[Jeff Beal]

From Section 2.4 of the JSP 1.2 specification:
"If the errorPage attribute of a page directive names a URL that refers 
to another JSP, and that JSP indicates that it is an error page (by 
setting the page directive’s isErrorPage attribute to true) then the 
'exception' implicit scripting language variable of that page is 
initialized to the offending Throwable reference"

-- Jeff
Daffin, Miles (Company IT) wrote:
JC,
Thanks. This I know. But...
If I do this in struts-config:
<global-exceptions>
    <exception
        key="exception.general"
        type="java.lang.Exception"
        path="/error.jsp"/>
</global-exceptions>
Then error.jsp will be called when an Exception is thrown by an Action
method. In error.jsp I can print a general message. I would like to be
able to also print out stack trace info in the jsp. Does the mere fact
of designating error.jsp as my error hadling page mean that struts has
put the Exception somewhere, e.g. the request? If so under what key? Or
must I do all this myself:
<global-exceptions>
    <exception
        key="exception.general"
        type="java.lang.Exception"
        path="/error.do"
        handler="com.plok.blah.ExeptionHandler" />
</global-exceptions>
In ExeptionHandler I log the problem ad then put the formatted Exeption
stacktrace on the request, or something similar?
-Miles

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 
Sent: 11 January 2005 16:20
To: Struts Users Mailing List
Subject: RE: Handling the exceptions in struts



Miles, you can capture a stack trace from any throwable using 
a technique
like:

                 ByteArrayOutputStream baos = new 
ByteArrayOutputStream();
                 (new Throwable(s)).printStackTrace(new 
PrintStream(baos));
                 return baos.toString();

The result could be logged.
Hope this helps.
JC
                                                             
                                                                     
                     "Daffin, Miles                          
                                                                     
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The html:errors tag will display a generic message but how 
can I display the details of what went wrong (e.g. the 
Exception's stacktrace) in the designated error jsp?

What are the options?
Can someone point me at some docs that go into this in more detail?
Thanks,
-Miles




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