Criteria query cache caching in Eclipselink?

Question

Iam using criteria queries with EclipseLink as JPA . I need to cache the query results based on their parameters . When I used query.setHint("eclipselink.QUERY_RESULTS_CACHE", "TRUE") it still fires query to the database. How can I use it in context of criteria queries ?

Here I set my query and their hints and addNamedQuery

Query query = psEntityManager.getEntityManager().createQuery(criteriaQuery);// Creating Query to supply Values
        query.setHint("eclipselink.QUERY_RESULTS_CACHE", "TRUE");
        query.setHint(QueryHints.QUERY_TYPE,QueryType.ReadObject);
        psEntityManager.getEntityManager().getEntityManagerFactory().addNamedQuery("query1", query);

Here is my output :

Query1-----------
[EL Fine]: sql: 2013-10-10 21:33:35.495--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, ADDRESSLINE1, ADDRESSLINE2, PHONENUMBER, fkCityId, fkPersonId FROM ADDRESS WHERE (fkPersonId = ?)
    bind => [2]
[EL Fine]: sql: 2013-10-10 21:33:35.527--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, CITYNAME, PINCODE, fkStateId FROM CITY WHERE (PRIMARYKEY = ?)
    bind => [2]
[EL Fine]: sql: 2013-10-10 21:33:35.528--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, STATENAME FROM STATE WHERE (PRIMARYKEY = ?)
    bind => [1]
[EL Fine]: sql: 2013-10-10 21:33:35.531--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, AGE, DOB, FIRSTNAME, LASTNAME, SEX, TIMESTAMP, fkDepartmentId FROM PERSON WHERE (PRIMARYKEY = ?)
    bind => [2]
[EL Fine]: sql: 2013-10-10 21:33:35.541--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, DEPTNAME FROM DEPARTMENT WHERE (PRIMARYKEY = ?)
    bind => [2]
[EL Fine]: sql: 2013-10-10 21:33:35.547--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, CITYNAME, PINCODE, fkStateId FROM CITY WHERE (PRIMARYKEY = ?)
    bind => [5]
[EL Fine]: sql: 2013-10-10 21:33:35.548--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, STATENAME FROM STATE WHERE (PRIMARYKEY = ?)
    bind => [3]
[EL Fine]: sql: 2013-10-10 21:33:35.551--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, CITYNAME, PINCODE, fkStateId FROM CITY WHERE (PRIMARYKEY = ?)
    bind => [8]
[EL Fine]: sql: 2013-10-10 21:33:35.553--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, STATENAME FROM STATE WHERE (PRIMARYKEY = ?)
    bind => [4]
Query2-----------
[EL Fine]: sql: 2013-10-10 21:33:35.557--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, ADDRESSLINE1, ADDRESSLINE2, PHONENUMBER, fkCityId, fkPersonId FROM ADDRESS WHERE (fkPersonId = ?)
    bind => [2]
Query3-----------
[EL Fine]: sql: 2013-10-10 21:33:35.56--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, ADDRESSLINE1, ADDRESSLINE2, PHONENUMBER, fkCityId, fkPersonId FROM ADDRESS WHERE (fkPersonId = ?)
    bind => [2]
Query4-----------
[EL Fine]: sql: 2013-10-10 21:33:35.563--ServerSession(14144548)--Connection(7200601)--SELECT PRIMARYKEY, ADDRESSLINE1, ADDRESSLINE2, PHONENUMBER, fkCityId, fkPersonId FROM ADDRESS WHERE (fkPersonId = ?)
    bind => [2]

Are you storing this query as a named query? The EMF in JPA 2.1 provides addNamedQuery to store named queries dynamically — Chris
execute the same query with the same parameters in the same context multiple times in a row - does it hit the database each time? As for links, check the JPA 2.1 spec. You can create the query and add it to the EMF using addNamedQuery so it can be looked up and reused with the createNamedQuery api. — Chris
@Chris thanks!! I did but not working ,it still fired queries multiple times. Any other solution please.. — Achyut

Chris Chris · Accepted Answer · 2013-10-10T16:32:31

Remove the query.setHint(QueryHints.QUERY_TYPE,QueryType.ReadObject), or call it first. The query_type changes the underlying query object, and not all the hints might be copied into the new object. It seems unnecessary anyway.

Criteria query cache caching in Eclipselink?

1 Answers