Control multiple updates and queries within one transaction in JPA

Question

Hi,
I have a question regarding control multiple updates and queries within one transaction. We are using EclipseLink 2.3.1. With below code, will I be able to:
- have all insert, update, select queries committed in one transaction;
- queryGetBalance will return the latest OrgBalance after update;
- if one fails, everything rolls back.
Thanks!
Jeffrey
PS: I realized that I cannot use em.getTransaction().begin() and em.getTransaction().commit(), since I am using JTA.
=============
@PersistenceContext(unitName="Test")
EntityManager em;
em.setFlushMode(FlushModeType.COMMIT);
newTransaction.setAmount(1000);
newTransaction.setType("check");
em.persist(newTransaction);
orgAudit.setUpdateUser("Joe")
orgAudit.setupUpdateTime(time);
em.merge(orgAudit);
Query queryUpdateBalance = em.createQuery("update OrgBalance o set o.balance = o.balance + :amount where orgId = :myOrgId");
queryUpdateBalance.setParameter("amount", 1000);
queryUpdateBalance.setParameter("myOrgId", 1234);
Query queryGetBalance = em.createQuery("select OrgBalance o where o.orgId = :myOrgId");
queryGetBalance.setHint("javax.persistence.cache.storeMode", CacheStoreMode.REFRESH);
queryGetBalance.setHint("javax.persistence.cache.retrieveMode", CacheRetrieveMode.BYPASS);
queryGetBalance.getResultList();
em.flush();
Edited by: JeffreyW on Dec 12, 2011 10:34 AM

Answer 1

Yes, the operation will be in a single transaction, assuming you are using a JTA managed SessionBean and the code is part of a SessionBean method.