check if transaction is active concode_field_sep EntityManager entityManager concode_field_sep void closeTrx concode_elem_sep String getConnection concode_elem_sep boolean contains concode_elem_sep boolean isClosed concode_elem_sep String getFlushMode concode_elem_sep boolean isDetached concode_elem_sep void beginTrx concode_elem_sep EntityManager getEntityManager concode_elem_sep void commitTrx concode_elem_sep void rollbackTrx