Sorry if I keep bothering you. So I would make a a ErrorViewHelper but how does that ErrorViewHelper notify other views of the error without using or referensing another viewhelper in it? For example on my Invalid Subdomain exception I would want a particular view to know of this error. Thanks and sorry!
On 8/10/05, Steven Webster <[EMAIL PROTECTED]> wrote: > Hi Omar, > > Remember that we're building OO systems in Flex here... > > First off; you might consider having an ErrorViewHelper ... there's a good > argument here for a view helper. Your "model" is an exception, but you want > to manipulate that model to prepare it for the view, ie to change an > exception into a user-readable error message displayed in a dialog. Perhaps > you even have different icons to display in your error dialog depending on > the exception thrown. So in this case, you might want to consider an > ErrorViewHelper that is responsible for popping up an error dialog with an > appropriate error message/icon depending upon the exception thrown. > > So yes .... perhaps a ViewHelper will work for you here, and I think it's a > valid use-case for the pattern. > > But my earlier warning; remember you are building on OO system here. So you > should think about what business objects you can extract that have utility > for your application. I might think about creating an ErrorService class > that sits outwith the Cairngorm framework and provides the utility that you > require. Your command classes can then become clients of your ErrorService > class, which can be separately unit-tested. > > Cairngorm is doing 80% of the heavy-lifting on most applications, and gives > structure to your workflow. But, I'd really like to see developers > continuing to take responsibility for application-specific business domain > objects, rather than abdicating responsibility for where behavior resides, > to a best-fit choice of command, business delegate or view helper. > > Make sense ? > > Steven > PS. I hate class names ending in Manager or Service - it's just such an > overused suffix that lacks ingenuity. ExceptionManager, ErrorService, > ErrorManager .... aaargh. See if you can find a name that describes your > particular problem's solution a little better than I can. :) > > -- > Steven Webster > Technical Director > iteration::two > [EMAIL PROTECTED] > > Office: +44 (0)131 338 6108 > Mobile: +44 (0)7977 216 223 > > This e-mail and any associated attachments transmitted with it may contain > confidential information and must not be copied, or disclosed, or used by > anyone other than the intended recipient(s). If you are not the intended > recipient(s) please destroy this e-mail, and any copies of it, immediately. > > Please also note that while software systems have been used to try to ensure > that this e-mail has been swept for viruses, iteration::two do not accept > responsibility for any damage or loss caused in respect of any viruses > transmitted by the e-mail. Please ensure your own checks are carried out > before any attachments are opened. > > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On > Behalf Of Omar Ramos > Sent: 10 August 2005 20:42 > To: [email protected] > Subject: Re: [flexcoders] Cairgorm command question. > > Thanks for your reply steven. Let me tell my case. I am checking a subdomain > on the .NET side and if the subdomain is not available .net throws a > DomainNotAvailable event with a error code. Now in flash if the error code > is DomainNotAvailable then I show the user some status text on the view. The > code that determinates either to show the user a regular exception or a > subdomain not available exception, where would this code be? For example in > the flexshop example in the cairgorm example you have some methods on the > viewhelper that notify the user of the error. In my case I need to do some > logic to know what error to show the user. > > Omar Ramos > System Developer > Nobox Marketing Group, Inc. > > On 8/10/05, Steven Webster <[EMAIL PROTECTED]> wrote: > > Omar, > > > > ViewHelper should have *nothing* to do with handling faults. You will > > have to decide how you choose to pass exceptions back from J2EE to > > Flex; you can catch those either in the onResult() or onFault() > > methods of your command classes, and handle accordingly. > > > > Note that you will not (typically) be throwing exceptions on the Java > > side and catching them on the client side. Rather, if something > > happens in your server-side POJO/delegate/whatever that you can't > > handle, and need to defer to the client to handle, you will need to > > conceive a mechanism for passing status between the server and client. > > > > I'd anticipate you doing this in the onResult() of a command, rather > > than onFault(). > > > > But remember - ViewHelpers should only be used to prepare and massage > > the model for rendering to the view. ViewHelpers are *not* catch all > > places for any business logic that doesn't obviously fit in > > controller/command/delegate or service locator !!! > > > > Best, > > > > Steven > > > > > > -- > > Steven Webster > > Technical Director > > iteration::two > > [EMAIL PROTECTED] > > > > Office: +44 (0)131 338 6108 > > Mobile: +44 (0)7977 216 223 > > > > This e-mail and any associated attachments transmitted with it may > > contain confidential information and must not be copied, or disclosed, > > or used by anyone other than the intended recipient(s). If you are not > > the intended > > recipient(s) please destroy this e-mail, and any copies of it, > immediately. > > > > Please also note that while software systems have been used to try to > > ensure that this e-mail has been swept for viruses, iteration::two do > > not accept responsibility for any damage or loss caused in respect of > > any viruses transmitted by the e-mail. Please ensure your own checks > > are carried out before any attachments are opened. > > > > -----Original Message----- > > From: [email protected] [mailto:[EMAIL PROTECTED] > > On Behalf Of Omar Ramos > > Sent: 10 August 2005 18:49 > > To: [email protected] > > Subject: Re: [flexcoders] Cairgorm command question. > > > > Yeah thats what I tought. Command would send the error code or message > > to the view helper and the helper applies the logic and takes action > > on the view. > > > > On 8/10/05, Omar Ramos <[EMAIL PROTECTED]> wrote: > > > Yeah I mean from the server I mite send difrent types of errors for > > > the same invocation. The logic for handeling the type of error and > > > taking action on the view corresponds on the command or the > > > viewhelper? > > > > > > On 8/10/05, Allen Manning <[EMAIL PROTECTED]> wrote: > > > > Omar, > > > > > > > > I think 'onFault' or 'onStatus' is a method of the Responder. > > > > > > > > Allen > > > > www.prismix.com/ > > > > > > > > > > > > > > > > -----Original Message----- > > > > From: [email protected] > > > > [mailto:[EMAIL PROTECTED] > > > > On Behalf Of Omar Ramos > > > > Sent: 10 August 2005 18:10 > > > > To: [email protected] > > > > Subject: [flexcoders] Cairgorm command question. > > > > > > > > Hi guys I have a simple question. Does my command need to have the > > > > logic to manage the exceptiosn I recive from remoting and decide > > > > what to do depending on the exception? or does that belong on the > > > > view helper? Thanks for any feedback you can give with this. > > > > > > > > > > > > Omar Ramos > > > > > > > > > > > > > > > > -- > > > > Flexcoders Mailing List > > > > FAQ: > > > > > > > http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt > > > > Search Archives: > > > > > > http://www.mail-archive.com/flexcoders%40yahoogroups.com > > > > Yahoo! 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