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  1. OpenEJB
  2. OPENEJB-1443

EntityManager in non-transactional business methods using queries can be used only once

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.1.4
    • Fix Version/s: 4.0.0-beta-2
    • Component/s: integration
    • Labels:
      None

      Description

      A call without any transaction on a business method which does not require a transaction cannot use the EntityManager after making a query. The Query object is wrapped by JtaQuery which closes the EntityManager after any call to the object. The following is an example that does not work when called outside of any transaction, where em is the injected EntityManager:

      @TransactionAttribute(TransactionAttributeType.SUPPORTS)
      public City getCity(String cityName) {
      Query query = null;
      query = em.createNamedQuery("City.RetrieveCityByName");
      query.setParameter(1, cityName);
      if (!query.getResultList().isEmpty())
      --> return (City) query.getResultList().get(0);
      else
      throw new RuntimeException("Cannot locate a city named " +
      cityName);
      }

      The first call to getResultList() is OK, but the second call fails because it already closed the EntityManager. The following stack trace excerpt shows the stack in OpenEJB during the second call to getResultList():

      Caused by: java.lang.IllegalStateException: Attempting to execute an operation on a closed EntityManager.
      at org.eclipse.persistence.internal.jpa.EntityManagerImpl.verifyOpen(EntityManagerImpl.java:1516)
      at org.eclipse.persistence.internal.jpa.EntityManagerImpl.close(EntityManagerImpl.java:1380)
      at org.apache.openejb.persistence.JtaQuery.getResultList(JtaQuery.java:45)

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            • Assignee:
              Unassigned
              Reporter:
              dallen6 David Allen
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              • Created:
                Updated:
                Resolved: