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https://issues.apache.org/jira/browse/OPENJPA-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13560732#comment-13560732
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gonzalad commented on OPENJPA-2327:
-----------------------------------
Wouldn't it be nice to use javax.persistence.cache.retrieveMode (or
javax.persistence.cache.storeMode) as a hint to enable query caching ?
And to introduce this in JPA spec ?
Perhaps I'm missing sthing here and there's going to be a collision with
another function already activated by those hints though.
> QueryCache as hint
> ------------------
>
> Key: OPENJPA-2327
> URL: https://issues.apache.org/jira/browse/OPENJPA-2327
> Project: OpenJPA
> Issue Type: Bug
> Reporter: gonzalad
>
> Provide a way to enable query cache as a query hint.
> This would facilitate writing portable JPA applications.
> For the time being, with OpenJPA, we need to execute the following code to
> cache the query :
> {code:java}
> OpenJPAEntityManager oem = ((OpenJPAQuery<?>) query).getEntityManager();
> OpenJPAEntityManagerFactory oemf = oem.getEntityManagerFactory();
> QueryResultCache qcache = oemf.getQueryResultCache();
> qcache.pin(query);
> {code}
> It would be easier if JPA provided a query hint like :
> {code:java}
> query.setHint("openjpa.cacheable", cache);
> {code}
> This would even enable us to use it in a NamedQuery declaration :
> {code:java}
> @NamedQuery(name = "Civilite.findAll",
> query = "SELECT c FROM Civilite c",
> hints = @QueryHint(name = "openjpa.cacheable", value = "true"))
> {code}
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