Changing Runtime View Object Settings Before and After Using Them

Question

Hi,
I'm doing some VO coding at the moment and reading around the subject to get an idea of best practices.
I stumbled across 2 blogs that are slightly contradictory:
https://blogs.oracle.com/vijaymohan/entry/applyviewcriteria_design_timerun_time_view_criteria
http://radio-weblogs.com/0118231/stories/2007/05/23/avoidActivationErrorsByChangingRuntimeViewObjectSettingsBeforeUsingThemNotAfter.html
What is the best practice when programmatically using VOs? Should I do cleanup before/after when using them.
Thanks
Kevin

Answer 1

John,
I read it in an unofficial blog somewhere yesterday and I cannot locate it now!
I'm reading some official documentation on this today:
http://docs.oracle.com/cd/E14571_01/web.1111/b31974/bcstatemgmt.htm#autoId37
The example steps given in 40.8.2 seems to contradict the latter paragraph:
Because many of the view object's instance settings are saved in the passivation state snapshot and restored on activation (as described in Section 40.5.1, "State Information Saved During Passivation"), it is not advisable to change any of these settings just after executing the view object+ if you won't be re-executing the view object again during the same block of code (and so, during the same HTTP request). Instead, change the view object instance settings the next time you need them to be different before executing the query.
Steps 5 and 6 seems to be changing the settings after executing the view object.+
Bottom line is I'm looking for best practice.
Should I do this in a VOImpl method:
//save original VO settings
String originalWhereClause = this.getWhereClause();
String originalOptimizerHint = this.getQueryOptimizerHint();
String originalOrderByClause = this.getOrderByClause();
String[] originalViewCriterias = this.getApplyViewCriteriaNames();
//change VO where settings and execute query
//restore original VO settings
this.setWhereClause(originalWhereClause);
this.setApplyViewCriteriaNames(originalViewCriterias);
this.setQueryOptimizerHint(originalOptimizerHint);
this.setOrderByClause(originalOrderByClause);
Or is that all unnecessary?