gonzalad created OPENJPA-2327:
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Summary: 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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