Dear John As posted there are different way of supporting your requierements. Also AJAX came to mind until I attended yesterday a presentation from Christian Bauer on JBoss SEAM project. Christian works with Gaving King (hibernate lead) on this project. I suggest you have a look at it on JBoss site.
Hope this helps. Bruno Georges Glencore International AG Tel. +41 41 709 3204 Fax +41 41 709 3000 ----- Original Message ----- From: "John MccLain" [EMAIL PROTECTED] Sent: 09.03.2006 22:11 To: "Tomcat user list" <users@tomcat.apache.org> Subject: Architecture question for all you gurus out there We have a fairly large client/server app that we converted to a java webapp. The original app was in powerbuilder. there were 2 types of rules applied to field rendering: 1) any rule that could be handled when the screen loaded was handled via screen level events, e.g., if a screen had fields with default values, or hidden fields under certain conditions, then these would be applied at screen entry via an onchange event for the screen 2) computed fields were handled via onChange events on the field, e.g., if field x changes, change field y The 'field rules' could be any valid powerscript expression What we have done is mimicked this in java. we process the same way as above, except we dynamically convert (very painfully) the powerscript into java syntax, then run the rules as above, by passing the converted rules to an embedded java interpreter (BeanShell) The problem is if you have sophisticated rules, or rules which affect many different fields, e.g., if field x changes, change field y, but if field y changes, change field z, etc... This becomes very slow - up to 15 seconds for a screen to render or change completely. Not to mention the complexity of the rules management. Is there a better way??? John McClain Senior Software Engineer TCS Healthcare [EMAIL PROTECTED] (530)886-1700x235 "Skepticism is the first step toward truth" --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] LEGAL DISCLAIMER. The contents of this e-mail and any attachments are strictly confidential and they may not be used or disclosed by someone who is not a named recipient. If you have received this email in error please notify the sender by replying to this email inserting the word "misdirected" as the message and delete this e-mail from your system. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
