我正在为我的应用程序测试JPA。
与DB的连接似乎是成功的,
Running com.vgorcinschi.rimmanew.ejbs.OutsideContainerJpaTests
[EL Info]: 2015-12-25 07:32:26.202--ServerSession(1302779492)--EclipseLink, version: Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd
[EL Info]: connection: 2015-12-25 07:32:26.493--ServerSession(1302779492)--file:/home/vgorcinschi/NetBeansProjects/RimmaNew/target/classes/_outsideContainer login successful
但数据不存在。
因为我的应用程序在GlassFish上运行,而我正在尝试容器外的JUnit测试,所以我创建了第二个持久性单元。这就是persistence.xml文件中的内容(注意我已将我的凭据屏蔽到数据库):
<persistence-unit name="outsideContainer" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.schema-generation.database.action" value="create"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.url"
value="jdbc:mysql://127.0.0.1:3306/beaty_shop?zeroDateTimeBehavior=convertToNull"/>
<property name="javax.persistence.jdbc.user" value="**********"/>
<property name="javax.persistence.jdbc.password" value="*************"/>
</properties>
</persistence-unit>
这是返回EntityManagerFactory的单例方法:
public static EntityManagerFactory getUniqueInstance() {
if (uniqueInstance == null) {
synchronized (EntityManagerFactoryProvider.class) {
if (uniqueInstance == null) {
uniqueInstance = Persistence.createEntityManagerFactory("outsideContainer");
}
}
}
return uniqueInstance;
}
这是Repository Stub,它不会抛出异常,但也不会将数据保存到DB。事务已启动并提交......
public class JpaAppointmentRepositoryStub implements AppointmentRepository {
private EntityManagerFactory emf;
public JpaAppointmentRepositoryStub(EntityManagerFactory emf) {
this.emf = emf;
}
public JpaAppointmentRepositoryStub() {
}
@Override
public void add(Appointment appointment) {
EntityManager em = entityManagerFactory.createEntityManager();
EntityTransaction trans = em.getTransaction();
try {
trans.begin();
em.persist(appointment);
trans.commit();
} catch (Exception e) {
trans.rollback();
} finally {
em.close();
}
}
@Override
public void update(Appointment appointment) {
EntityManager em = entityManagerFactory.createEntityManager();
em.merge(appointment);
}
@Override
public Appointment get(long id) {
EntityManager em = entityManagerFactory.createEntityManager();
try {
return em.find(Appointment.class, id);
} catch (NoResultException e) {
return null;
} finally {
em.close();
}
}
}
来自EntityManager的事务不为空:
@Test
public void aTransactionIsNotNull(){
EntityManager em = entityManagerFactory.createEntityManager();
EntityTransaction trans = em.getTransaction();
assertNotNull(trans);
em.close();
}
最后一个有趣且有用的信息是存储库正在运行&#34;由具有Repository的保存和更新操作的单一方法的Service类。所以唯一的缺点应该是在每次调用时打开和关闭两个实体管理器:
public class OutsideContainerAppointmentService implements AppointmentService{
private final AppointmentRepository repository;
...
@Override
public void save(Appointment appointment) {
if (findById(appointment.getId()) != null)
repository.update(appointment);
else
repository.add(appointment);
}
...
}
MySQL Connector / J在此Maven项目的测试依赖项中(但由于登录成功,这不是问题)。
那么您认为可能是什么问题?
答案 0 :(得分:1)
即使它没有意义(至少到目前为止),正确的解决方案就是这样。
我添加了.joinTransaction()方法,一切正常。
@Override
public void add(Appointment appointment) {
EntityManager em = entityManagerFactory.createEntityManager();
EntityTransaction trans = em.getTransaction();
trans.begin();
try {
//this is the line that I have added
em.joinTransaction();
em.persist(appointment);
trans.commit();
} catch (Exception e) {
trans.rollback();
} finally {
em.close();
}
}
但根据JPA wiki我不应该在这种情况下使用.joinTransaction():
joinTransaction仅用于JTA托管的EntityManagers(JTA persistence.xml中的transaction-type)。对于RESOURCE_LOCAL EntityManagers你可以随时提交JPA事务 欲望。
另一个&#34; bug&#34;我必须解决的问题是将appointmentService.save(dummy);
转移到setUp()方法之外,并转移到@Test注释方法中。这就是我开始双重写入数据库的原因。