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Checking for form changes

Gran Roguismo
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Joined: Mar 10, 2005
Posts: 77
I am generating reports of a decent size and so it becomes important that I don't requiry the db every time I move onto a page, it would really slow down movement on the site.
So I have decided to take my form and put it into session as "oldReportForm" during the next call to the action I call it back out of the session, I compare and if anything has changed, I run my query.

the problem is this: Every time I compare oldReportForm has already been changed to match the current reportForm. I don't understand why though.
I am not doing request.getSession().setAttribute("oldReportForm", rf); anywhere else, and I take it out before I actually set it.

Also, if you have any suggestions for doing what I want in a better way, then they would be greatly appreciated.

Merrill Higginson
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Joined: Feb 15, 2005
Posts: 4864
If you've changed the scope of the Form to "session" in the Struts config file, it is being kept in the session by Struts.

Consultant, Sima Solutions
Gran Roguismo
Ranch Hand

Joined: Mar 10, 2005
Posts: 77
currently the reportForm is being set to session in the struts config. The oldReportForm is not part of the config at all, so wouldn't be effected to my thinking.
I'm a little confused by your post though.
It is sorta covered in the JavaRanch Style Guide.
subject: Checking for form changes
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