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https://issues.apache.org/jira/browse/OPENJPA-1151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Donald Woods reopened OPENJPA-1151:
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patch caused some test regressions on MySQL and Oracle
> Cache the current-time timestamp in AbstractQueryCache.onTypesChanged()
> -----------------------------------------------------------------------
>
> Key: OPENJPA-1151
> URL: https://issues.apache.org/jira/browse/OPENJPA-1151
> Project: OpenJPA
> Issue Type: Improvement
> Components: jdbc
> Affects Versions: 1.3.0, 2.0.0
> Reporter: Jody Grassel
> Assignee: Donald Woods
> Priority: Trivial
> Fix For: 1.3.0, 2.0.0-M3
>
> Attachments: OpenJPA-trunk-JIRA1151-tests.patch,
> OpenJPA-trunk-JIRA1151.patch
>
>
> AbstractQueryCache.java contains the following block:
> for (Object o: changedTypes) {
> String name = ((Class) o).getName();
> if(!changedClasses.containsKey(name))
> changedClasses.put(name,
> new Long(System.currentTimeMillis()));
> }
> Suggesting caching the Long containing the entity type's last-modification
> timestamp outside of the for-loop to improve performance and reduce memory
> usage.
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