Why do I need to use entityManager.flush() ?

[w17chm4n]

Why do I need to use flush() when using SMPC ?

Before I had this

@Stateful
@Scope(ScopeType.APPLICATION)
@Name("questionTypeManager")
public class QuestionTypeManagerBean implements QuestionTypeManager {

 @Logger
 Log log;

 @PersistenceContext
 EntityManager entityManager;

 public void addQuestionType(String questionType) {
 entityManager.persist(new QuestionType(questionType));
 log.info("Successfuly persisted question type");
 }

 @Remove @Destroy
 public void destroy() {}

}

But when I`ve switched to SMPC I had to add entityManager.flush() couse entityManager didn`t persist QuestionType to the database. It didn`t show any errors either.

Why is that ?

[pmuir]

Post your SMPC version of the code.

[w17chm4n]

@Stateful
@Scope(ScopeType.APPLICATION)
@Name("questionTypeManager")
public class QuestionTypeManagerBean implements QuestionTypeManager {

 @Logger
 Log log;

 @In
 EntityManager entityManager;

 public void addQuestionType(String questionType) {
 entityManager.persist(new QuestionType(questionType));
 entityManager.flush();
 log.info("Successfuly persisted question type");
 }

 public QuestionType getQuestionTypeByName(String questionTypeName) {
 return (QuestionType)entityManager.createQuery("from QuestionType q where q.questionType = '" + questionTypeName + "'").getSingleResult();
 }

 public List<QuestionType> getAllQuestionTypes() {
 return entityManager.createQuery("from QuestionType qt").getResultList();
 }

 @Remove @Destroy
 public void destroy() {}

}