현재 강의에서 em.persist 를 하는 이유가 정확하게 뭔가요?

작성한 질문수 13

2

안녕하세요. 김주현님, 공식 서포터즈 OMG입니다.

알고 계신대로 persist()는 엔티티 매니저를 사용해서 엔티티를 영속성 컨텍스트에 저장합니다.

public interface EntityManager {

    /**
     * Make an instance managed and persistent.
     * @param entity  entity instance
     * @throws EntityExistsException if the entity already exists.
     * (If the entity already exists, the <code>EntityExistsException</code> may 
     * be thrown when the persist operation is invoked, or the
     * <code>EntityExistsException</code> or another <code>PersistenceException</code> may be 
     * thrown at flush or commit time.) 
     * @throws IllegalArgumentException if the instance is not an
     *         entity
     * @throws TransactionRequiredException if there is no transaction when
     *         invoked on a container-managed entity manager of that is of type 
     *         <code>PersistenceContextType.TRANSACTION</code>
     */
    public void persist(Object entity);

감사합니다.