我正在使用 Spring + JPA + Hibernate + EntityManager 与数据库通信。我收到“A JTA EntityManager cannot use getTransaction() ”错误。请提供您的见解并帮助我解决问题。
豆类.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans default-autowire="byName"
... xmlns definitions...
xsi:schemaLocation="...">
<context:component-scan base-package="com.mycompany.myproject" />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" />
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="myDAO" class="com.mycompany.myproject.dao.myDAO" />
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven />
</beans>
持久性.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence ... xmlns definitions xsi:schemaLocation="..." version="1.0">
<persistence-unit name="TEST_DS">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/TEST_DS</jta-data-source>
<class>com.twinspires.exchange.model.Test</class>
<properties>
<property name="hibernate.archive.autodetection" value="class, hbm" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="validate" /> <!-- create-drop update -->
<property name="hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider" />
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
</properties>
</persistence-unit>
</persistence>
异常堆栈跟踪(摘录)
15:47:43,340 INFO [STDOUT] DEBUG: org.springframework.transaction.annotation.AnnotationTransactionAttributeSource - Adding transactional method 'getName' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:47:43,343 INFO [STDOUT] DEBUG: org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'transactionManager'
15:47:43,356 INFO [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Creating new transaction with name [com.twinspires.exchange.dao.PicDAO.getName]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:47:44,114 INFO [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@c629e5] for JPA transaction
15:47:44,124 INFO [STDOUT] DEBUG: org.springframework.orm.jpa.JpaTransactionManager - Could not rollback EntityManager after failed transaction begin
15:47:44,125 INFO [STDOUT] java.lang.IllegalStateException: A JTA EntityManager cannot use getTransaction()
15:47:44,125 INFO [STDOUT] at org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:818)
15:47:44,126 INFO [STDOUT] at org.springframework.orm.jpa.JpaTransactionManager.closeEntityManagerAfterFailedBegin(JpaTransactionManager.java:412)
15:47:44,127 INFO [STDOUT] at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:381)
15:47:44,128 INFO [STDOUT] at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
15:47:44,129 INFO [STDOUT] at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
15:47:44,129 INFO [STDOUT] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
15:47:44,130 INFO [STDOUT] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
15:47:44,131 INFO [STDOUT] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
15:47:44,131 INFO [STDOUT] at $Proxy175.getName(Unknown Source)
以下是我的道课:-
public class MyDao implements IMyDao {
@PersistenceContext(unitName = "TEST_DS")
private EntityManager entityManager;
@Transactional
public String getName() {
final Query query = entityManager.createQuery("from TestTable");
final Object obj = query.getResultList().get(0);
return obj == null ? "Empty" : (String) obj;
}
}
非常感谢您的帮助。