[英]Junit test failing after adding ehcache to a DAO class, can't instantiate DAO in test class
我將ehcache添加到我的項目中,並且為我的DAO提供了一個單元測試類,如果我在DAO上注釋了ehcache批注,則運行OK,如果取消注釋,它將失敗,表明它無法自動裝配DAO bean。
這是我得到的錯誤:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.nicobrest.kamehouse.dao.DragonBallUserDaoJpaTest': Injection of autowired dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.nicobrest.kamehouse.dao.DragonBallUserDaoJpa com.nicobrest.kamehouse.dao.DragonBallUserDaoJpaTest.dragonBallUserDaoJpa;
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.nicobrest.kamehouse.dao.DragonBallUserDaoJpa] found for dependency:
expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=dragonBallUserDaoJpa)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
at
...
我也嘗試過,而不是在單元測試中自動裝配DAO bean,而是自動裝配應用程序上下文並按名稱獲取bean,這樣做時,我遇到了一個異常,即它無法將$ proxy32強制轉換為我的DAO類。
java.lang.ClassCastException: com.sun.proxy.$Proxy32 cannot be cast to com.nicobrest.kamehouse.dao.DragonBallUserDaoJpa
at com.nicobrest.kamehouse.dao.DragonBallUserDaoJpaTest.setUp(DragonBallUserDaoJpaTest.java:71)
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:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at
...
這些是相關文件:
applicationContext.xml
...
<cache:annotation-driven cache-manager="cacheManager"/>
<import resource="applicationContext-persistence.xml" />
<!-- Ehcache configuration -->
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
<property name="cacheManager" ref="ehcache" />
</bean>
<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="configLocation" value="classpath:ehcache.xml" />
<property name="shared" value="true" />
</bean>
<!-- Example endpoints beans -->
<bean id="dragonBallUserService" class="com.nicobrest.kamehouse.service.DragonBallUserService">
<property name="dragonBallUserDao" ref="dragonBallUserDaoJpa" />
</bean>
<bean id="dragonBallUserDaoJpa" class="com.nicobrest.kamehouse.dao.DragonBallUserDaoJpa">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
...
DragonBallUserDaoJpaTest.java
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:applicationContext.xml" })
public class DragonBallUserDaoJpaTest {
private static final Logger LOGGER
LoggerFactory.getLogger(DragonBallUserDaoJpaTest.class);
@Autowired
@Qualifier("dragonBallUserDaoJpa")
private DragonBallUserDaoJpa dragonBallUserDaoJpa;
...
@Test
public void createDragonBallUserTest() {
DragonBallUser dragonBallUser = new DragonBallUser(null, "vegeta", "vegeta@dbz.com", 49, 40,
1000);
try {
assertEquals(0, dragonBallUserDaoJpa.getAllDragonBallUsers().size());
dragonBallUserDaoJpa.createDragonBallUser(dragonBallUser);
assertEquals(1, dragonBallUserDaoJpa.getAllDragonBallUsers().size());
dragonBallUserDaoJpa
.deleteDragonBallUser(dragonBallUserDaoJpa.getDragonBallUser("vegeta").getId());
} catch (KameHouseBadRequestException | KameHouseNotFoundException e) {
e.printStackTrace();
fail("Caught unexpected exception.");
}
}
...
DragonBallUserDaoJpa.java
public class DragonBallUserDaoJpa implements DragonBallUserDao {
@Autowired
private EntityManagerFactory entityManagerFactory;
...
@CacheEvict(value = { "getAllDragonBallUsersCache" }, allEntries = true)
public Long createDragonBallUser(DragonBallUser dragonBallUser) {
EntityManager em = getEntityManager();
try {
em.getTransaction().begin();
em.persist(dragonBallUser);
em.getTransaction().commit();
} catch (PersistenceException pe) {
...
} finally {
em.close();
}
return dragonBallUser.getId();
}
...
我不知道還能嘗試什么,有什么想法嗎?
我正在使用Spring 4.2.4.RELEASE,Hibernate 5.1.0.Final,Hibernate JPA 1.0.0.Final,ehcache 2.9.0,JUnit 4.12。
絕對與ehcache有關,因為注釋批注可以在測試類中自動裝配DAO,並且單元測試通過了,但是我試了好幾個小時卻無法弄清楚。
謝謝!
第一個錯誤是因為您試圖注入DragonBallUserDaoJpa
而不是DragonBallUserDao
。 為了能夠添加緩存層,Spring在您的類上創建了一個代理。 並且此代理實現類的接口( DragonBallUserDao
),然后委托給實際的類( DragonBallUserDaoJpa
)。
檢索bean時,您有同樣的問題。 由於代理僅實現接口,因此您不能將其強制轉換為實現。 所以ClassCastException
。
因此,如果您在測試中這樣做(不需要限定符)
@Autowired
private DragonBallUserDao dragonBallUserDao;
它應該可以解決問題。
另一個解決方案(但我認為這沒有用)是強制Spring使用cglib創建代理。 這樣,您的代理確實可以擴展具體的類。 您需要這樣的內容: <aop:aspectj-autoproxy proxy-target-class="true" />
最后,您也可以刪除該接口,因為我非常懷疑您是否對此DAO有很多實現。 因此該接口是無用的,只會增加噪音。 刪除它將迫使Spring創建一個cglib代理,因為沒有可用的接口。
您的junit不會加載spring conf xml。
嘗試這個 :
@ContextConfiguration(locations = {
"classpath:pathTo/applicationContext.xml"})
編輯:嘗試刪除限定符和/或在創建bean時添加name屬性
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