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https://issues.apache.org/jira/browse/CAY-596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267573#comment-13267573
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Bryan Lewis commented on CAY-596:
---------------------------------
I've had issues like this, although I never could pin it down reliably. I
tried making a test case twice, but the problem never happened in the test
cases.
The most frequent failure for me was in a Tapestry CRUD page editing a main
item, where an object got added or deleted from a to-many relationship ina
secondary detail-editor page. When the main page re-rendered the item didn't
show the change. I worked around it on a page-by-page basis, invalidating the
item after such an add/delete operation. It happened on more and more pages,
the most recent case being a change in a simple attribute not appearing.
Finally I realized that few of my pages were trusting the object cache, so I
switched my Tapestry encoder from DataObjectUtils.objectForPK() to a refetch
with an ObjectIdQuery(id, CACHE_REFRESH). It takes only a few milliseconds to
refetch an item.
> DataObject cache works incorrect !
> ----------------------------------
>
> Key: CAY-596
> URL: https://issues.apache.org/jira/browse/CAY-596
> Project: Cayenne
> Issue Type: Bug
> Components: Core Library
> Affects Versions: 1.2 branch
> Environment: Windows XP, 1.4.2_06 by Sun Microsystems Inc., DB
> Oracle
> Reporter: Paul Ponec
> Priority: Critical
>
> Data object util method:
> DataObjectUtils.objectForPK(context, persistentClass, (Object) id);
> returns sometimes (freqency 30% on my sample) a DataObject with an old
> property value.
> If I am using code:
> Expression expr = ExpressionFactory.matchExp("id", id);
> SelectQuery query = new SelectQuery(persistentType, expr);
> List list = context.performQuery(query);
> return list.size()==1 ? list.get(0) : null;
> then result (all object properties) is OK always.
> ---
> A selection from map.xml:
> <db-entity name="CALL" schema="TEST">
> <db-attribute name="id" type="NUMERIC" isPrimaryKey="true"
> isMandatory="true"/>
> <db-attribute name="sign" type="VARCHAR" length="1"/>
> </db-entity>
> <obj-entity name="Call" className="xxx.Call" dbEntityName="CALL">
> <obj-attribute name="id" type="java.math.BigDecimal"
> db-attribute-path="id"/>
> <obj-attribute name="sign" type="java.lang.String"
> db-attribute-path="sign"/>
> </obj-entity>
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