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Exception Catcher doesn't always catch exceptions

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Ryan Puddephatt

Exception Catcher doesn't always catch exceptions

All,
    I had the following and it threw an exception because of no /result/message element exists, producing an invalid document

            <p:processor name="oxf:exception-catcher">
                <p:input name="data" href="#emailQueueQuery#xpointer(/result/message)"/>
                <p:output name="data" id="emailQueue" debug="EQ"/>
            </p:processor>

but the following catches the exception

            <p:processor name="oxf:identity">
                <p:input name="data" href="#emailQueueQuery#xpointer(/result/message)"/>
                <p:output name="data" id="emailQueueEx" debug="EQ"/>
            </p:processor>

            <p:processor name="oxf:exception-catcher">
                <p:input name="data" href="#emailQueueEx"/>
                <p:output name="data" id="emailQueue" debug="EQ"/>
            </p:processor>

why is the extra processor needed? Shouldn't it work with the first example?

Ryan

Ryan Puddephatt
Software Engineer

Teleflex Group - IT UK
1 Michaelson Square
Livingston
West Lothian
Scotland
EH54 7DP

e> [hidden email]
t> +44(0)1506 407 110
f> +44(0)1506 407 108
w> www.teleflex.com

"Measuring programming progress by lines of code is like measuring aircraft building progress by weight." - Bill Gates
"If you lie to the compiler, it will get its revenge." - Henry Spencer
"It's hard enough to find an error in your code when you're looking for it; it's even harder when you've assumed your code is error-free." - Steve McConnell
"If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilization." - Gerald Weinberg

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Alessandro Vernet

Re: Exception Catcher doesn't always catch exceptions

Administrator

Hi Ryan,

I would think that the first case should also catch the exception.
Would you have a simple pipeline we can use to reproduce this?

Now on the usefulness of this code, I am wondering what exactly you
are trying to do with this. Would you like to catch the case where
where is no /result/message? Why not use a p:choose/p:when to do this?

Alex

On 4/14/07, Ryan Puddephatt <[hidden email]> wrote:

>
> All,
> I had the following and it threw an exception because of no
> /result/message element exists, producing an invalid document
>
> <p:processor name="oxf:exception-catcher">
> <p:input name="data"
> href="#emailQueueQuery#xpointer(/result/message)"/>
> <p:output name="data" id="emailQueue" debug="EQ"/>
> </p:processor>
>
> but the following catches the exception
>
> <p:processor name="oxf:identity">
> <p:input name="data"
> href="#emailQueueQuery#xpointer(/result/message)"/>
> <p:output name="data" id="emailQueueEx" debug="EQ"/>
> </p:processor>
>
> <p:processor name="oxf:exception-catcher">
> <p:input name="data" href="#emailQueueEx"/>
> <p:output name="data" id="emailQueue" debug="EQ"/>
> </p:processor>
>
> why is the extra processor needed? Shouldn't it work with the first
> example?
>
> Ryan
>
> --
>
>
>
> Ryan Puddephatt
> Software Engineer
>
> Teleflex Group - IT UK
> 1 Michaelson Square
> Livingston
> West Lothian
> Scotland
> EH54 7DP
>
> e> [hidden email]
> t> +44(0)1506 407 110
> f> +44(0)1506 407 108
> w> www.teleflex.com
>
> "Measuring programming progress by lines of code is like measuring aircraft
> building progress by weight." - Bill Gates
> "If you lie to the compiler, it will get its revenge." - Henry Spencer
> "It's hard enough to find an error in your code when you're looking for it;
> it's even harder when you've assumed your code is error-free." - Steve
> McConnell
> "If builders built buildings the way programmers wrote programs, then the
> first woodpecker that came along would destroy civilization." - Gerald
> Weinberg
>
> --
> You receive this message as a subscriber of the [hidden email]
> mailing list.
> To unsubscribe: mailto:[hidden email]
> For general help: mailto:[hidden email]?subject=help
> ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
>
>

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