WOWODC 2009 Session Description: EOF Validation: The Next Generation
WOWODC 2009 Session Description: EOF Validation: The Next Generation
- Subject: WOWODC 2009 Session Description: EOF Validation: The Next Generation
- From: Chuck Hill <email@hidden>
- Date: Wed, 29 Apr 2009 11:34:08 -0700
Validation is one of the least satisfactory parts of WebObjects. It
shows signs of promise and of abandonment, like a prototype left
uncompleted. We will start with a survey of the state of validation
in WebObjects and the extensions found in Wonder's core ERExtensions
frameworks; the seldom used Validity framework; and in the GVC
EOFValidation framework. We will then dive in to take a look at EOF
validation "deep under the covers" focusing on the mechanics of how it
can be extended. We will then define the functionality that will make
the next generation of validation for WebObjects and examine an
implementation.
With a validation roadmap in place and a highly functional validation
base available, we will turn our attention to the WOComponent
presentation layer. Here, too, validation handling leaves much to be
desired and the functionality is not clear. We will look at the often
ignored validation handling in WOComponent and how it quickly breaks
down. We separate WOComponents into two categories, Pages and
PageComponents, and get them to co-operate in handling validation.
The result will be a page that can orchestrate validation handling,
including handling optimistic locking exceptions equally whether they
occur within one EOF stack or across instances. This will allow us to
create drop-in components that can handle their own validation in a co-
operative fashion with the page. As with validation, a functional,
documented foundation will be supplied.
In this session you will learn:
- how WebObjects validation is implemented
- how WebObjects validation can be extended
- how to make working with validation easier
- how validation handling was intended to work with WOComponent
- how to bring working validation handling to WOComponent
- how to detect optimistic locking exceptions within one EOF stack
- how to handle all optimistic locking exceptions
- how to use inheritance and composition to make validation handling
and presentation painless
- how to contribute to the future of EOF validation
The result of this session will be the release of two new frameworks
for WebObjects validation (one for the EOF layer and one for the
WOComponent presentation layer). These frameworks will be written to
be independent of other frameworks (including Project Wonder) so
everyone will be able to use and benefit from them. These frameworks
will be functional, but there will be areas where additional
functionality can be added (such as support for additional
databases). The intention is that these will get completed by others
in the community.
--
Chuck Hill Senior Consultant / VP Development
Come to WOWODC'09 in San Fran this June!
http://www.wocommunity.org/wowodc09/
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