本文介绍了没有可用的事务性EntityManager的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我是jpa和spring领域的新手,我目前正在以一种简单的方法进行一些单元测试,但是仅当我在单元测试模式下运行测试类时,才会不断收到此错误消息:

I am new to the jpa and spring world and I am currently doing some unit test on a simple method but keep getting this error message only when I run my test class in unit test mode:

java.lang.IllegalStateException: No transactional EntityManager available
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:223)
at $Proxy19.unwrap(Unknown Source)
at com.gemstone.integration.PersonDao.getPersonByUserNamePassword(PersonDao.java:59)
at com.gemstone.integration.PersonDaoTest.getPersonByUserNamePassword_Exist(PersonDaoTest.java:37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

但是,当我运行我的项目时,代码工作正常,它可以正确检索数据(不在单元测试模式下).

However the code works fine when i run my project it retrieves the data correctly(Not in unit test mode).

请在我的方法下面找到单元测试所基于的方法:

Please find below my method which the unit test will be based on:

@PersistenceContext
private EntityManager entityManager;
@SuppressWarnings("unchecked")
public boolean getPersonByUserNamePassword(String firsName, String password) {

    String hql = "from Person p where p.firstName = :firsName and p.password =:password";
    Session mysession = entityManager.unwrap(Session.class);

    Query query = mysession.createQuery(hql);
    query.setParameter("firsName", firsName);
    query.setParameter("password", password);
    List<Person> results = query.list();

    if (results != null && results.size() > 0) {

        return true;
    }
    return false;

}

我的下面的单元测试:

@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class })
@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(locations = { "classpath:/Intcontext.xml" })

public class PersonDaoTest {

    @Autowired
    PersonDao personDao;

    @Transactional
    @Test
    public void getPersonByUserNamePassword_Exist() {

        String firsName = "Andy";
        String password = "123";

        boolean isUserExists = personDao.getPersonByUserNamePassword(firsName,
                password);

        Assert.assertTrue(isUserExists);
    }

}

请问为什么我收到没有可用的事务性EntityManager错误的任何想法?:(

Any ideas why i am getting No transactional EntityManager available error please?:(

提前谢谢.

推荐答案

通过声明

@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class })

您完全(尽管无意地)对测试管理的交易禁用了.原因是您从已声明的侦听器列表中省略了TransactionalTestExecutionListener.

you have completely (albeit unintentionally) disabled support for test-managed transactions. The reason is that you have omitted TransactionalTestExecutionListener from the list of declared listeners.

但是请注意,默认情况下透明地声明了TransactionalTestExecutionListener.因此,当您从测试类中删除@TestExecutionListeners声明时,再次启用TransactionalTestExecutionListener.

Note, however, that TransactionalTestExecutionListener is declared transparently by default. Thus, when you delete your @TestExecutionListeners declaration from your test class, TransactionalTestExecutionListener is once again enabled.

您当然可以找到详细信息请参阅此处的Spring参考手册.

You can of course find details in the Spring Reference Manual here.

此致

Sam(Spring TestContext Framework的作者;))

Sam (author of the Spring TestContext Framework ;) )

这篇关于没有可用的事务性EntityManager的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-04 06:51
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