Exception Handlers

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by JADE Kid - Ray Hidayat >> Sat, 22 Apr 2000 7:04:56 GMT

Okay, this message is about exception handlers.

I have been reading about them, and as far as I know, to use them you have to do two things.

Code them and Arm them.

Well to arm them you do something like this.

on NotificationException do notificationException (exception)

Then you write the exception handler... Not posted here.
And it should work.

I was just wondering, where do you arm them, can you arm more than one, and do you only arm it for a certain method, for a certain class, or for the current application?

--
Ray Hidayat
JADE Kid - 2000
www.jadekids.com

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by Eric Peachey >> Tue, 25 Apr 2000 21:50:45 GMT

Okay, this message is about exception handlers.

Have a look at the paper on exception handlers available at www.jade.co.nz - select Developer Information and then Technical Papers. There's plenty of stuff there. The JADE Discovery Kit also offers plenty of help and examples on the use of exception handlers. You can get a copy of the JADE Discovery Kit on CD for a nominal sum if you don't want to download it (about 10NZD I think).

Eric in Dunedin

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by Arjan van Hasselt >> Wed, 26 Apr 2000 3:49:31 GMT

Exception Handlers are armed in each method where the exception is expected to occur. They can be disarmed anywhere in your code and are automatically disarmed at the end of your method. The only exception to this is if you have armed your exception handler with the "global" option. Then the exception handler remains armed until you disarm it or the application is terminated.

You can arm as many as you like and they go into the exception handling stack. At the very top of the stack is JADE's own default handler which should never be displayed in your final application.

Cheers ...AJ

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by JADE Kid - Ray Hidayat >> Thu, 27 Apr 2000 20:08:58 GMT

Thanks. I'll try that.

--
Ray Hidayat
JADE Kid - 2000
www.jadekids.com

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by JADE Kid - Ray Hidayat >> Wed, 5 Jul 2000 22:11:02 GMT

So if you want to set a global exception handler, where do you arm it? In the Global class?

--
Ray Hidayat
JADE Kid - 2000
www.jadekids.com

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by Michael Jones >> Wed, 5 Jul 2000 22:26:37 GMT

In the starting method of you app, typically in the initialize method, then disarm
in the finalize method.