Java 在集成测试之间刷新共享缓存

我正在使用嵌入式Glassfish 3.1.2执行集成测试。我在测试中做的第一件事是重置数据库，以便每个测试都有一个全新的数据库可以使用

但是，问题是对象被持久化在共享缓存中，而不是存储在数据库中。因此，当下一个测试开始时，它将从缓存而不是数据库中获取旧记录

我可以很容易地通过定义来解决这个问题

<property name="eclipselink.cache.shared.default" value="false"/>

但是，我不想禁用persistence.xml文件中的缓存，因为稍后会导致性能损失。我只想在测试的时候做。注意，我在这里使用的是JTA数据源

有什么想法吗

脱离主题，我正在尝试学习JavaEE，并遵循GalleriaEE项目，尝试根据我的需要修改它

致以最诚挚的问候退房 因为JPA2.0和EclipseLink原生api都允许清除共享缓存。您可以在测试开始或结束时调用此api

@BeforeClass
public static void startup() throws Exception { 
                container = EJBContainer.createEJBContainer();
                context = container.getContext();
    }

@Before
public void setUp() throws Exception {
  //Clean database before every test using dbunit
}

@Test // This is the first test, works well since the test is first in order
public final void testCreateUser() throws Exception {       
    UserService userService = (UserService) context.lookup("java:global/galleria/galleria-ejb/UserService");
    User user = new User(TEST_USER_ID, TEST_PASSWORD);
    User actualUser = userService.signupUser(user);
    assertTrue(actualUser != null);
    assertEquals(TEST_USER_ID, actualUser.getUserId());
    assertFalse(Arrays.equals(TEST_PASSWORD, actualUser.getPassword()));
    logger.info("Finished executing test method {}", testMethod.getMethodName());
}



 @Test // This is the second test, fails since the database not is clean
 public final void testCreateUser() throws Exception {      
    UserService userService = (UserService) context.lookup("java:global/galleria/galleria-ejb/UserService");
    User user = new User(TEST_USER_ID, TEST_PASSWORD);
    User actualUser = userService.signupUser(user); // FAILS since TEST_USER_ID already in cache!!

    //..
 }

@Stateless
@EJB(name = "java:global/galleria/galleria-ejb/UserService", beanInterface = UserService.class)
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class UserServiceImpl implements UserService
{
    @EJB
    private UserRepository userRepository;

    @Override
    @PermitAll
    public User signupUser(User user) throws UserException {            

        User existingUser = userRepository.findById(user.getUserId());
        if (existingUser != null)
        {
            logger.error("Attempted to create a duplicate user.");
            throw new UserException(DUPLICATE_USER);
        }

        try {
             user = userRepository.create(user);
        } catch (EntityExistsException entityExistsEx) {
            logger.error("Attempted to create a duplicate user.");
            throw new UserException(DUPLICATE_USER, entityExistsEx);
        }
        return user;
    }

        //..
}