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From <david.g...@hic.gov.au>
Subject Re: Logkit: NullPointerException in JMSQueueTarget constructor
Date Wed, 27 Feb 2002 08:57:48 GMT

Doh! I was actually suprised to see this as well. The other possibility to
solve the problem is to check for the m_errorhandler as null but this would
get tedious and impose an additional overhead every time you call the error
handler and again is not elegant. Does not look OO either.

Incidentally, even if we initialize it to the DefaultErrorHandler, as
AbstractJMSTarget does not call super in the constructor would it get

Peter Donald <peter@apache.org> on 27/02/2002 19:41:56

Please respond to "Avalon Developers List" <avalon-dev@jakarta.apache.org>

To:    "Avalon Developers List" <avalon-dev@jakarta.apache.org>

Subject:    Re: Logkit: NullPointerException in JMSQueueTarget constructor

On Wed, 27 Feb 2002 18:24, david.gray@hic.gov.au wrote:
> I think that it fails in createQueueConnection(), the code catches the
> exception runs getErrorHandler()  which then throws the NPE because the
> error handler is not defined!


> If you track through the code, the private variable ErrorHandler
> m_errorHandler in AbstractTarget is never initialized.

It is initialized as soon as the target is associated with a
Hierarchy/Logger. See something like Logger.setupErrorHandlers()

> I suspect the only way to resolve this sort of problem is to initialize
> field thus:
>     private ErrorHandler m_errorHandler = new
> org.apache.log.util.DefaultErrorHandler();

Anyone got any better ideas?



The difference between genius, and stupidity? Genius has limits

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