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我正在使用 Spring、JPA 和 GlassFish 3.1 做我的第一个项目，但遇到了一些麻烦。我一直在寻找一个星期的解决方案，但我什么也没找到。

我有一个实体（称为 Role），一个具有访问任何实体的通用方法的 GeneralRepository，一个实现有关 Role 的特定方法的 RoleRepository，以及一个调用 RoleRepository 的 Service 类。Service 类的方法是事务性的，但如果传播属性是 REQUIRED、REQUIRES_NEW 或 NESTED，我会得到 RollBackException。如果传播是强制性的，则会引发异常：

org.springframework.transaction.IllegalTransactionStateException: No existing transaction found for transaction marked with propagation 'mandatory'
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:339)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:101)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    ...

如果它是 NOT_SUPPORTED、NEVER 或 SUPPORT，则选择查询工作正常，但如果我尝试执行创建、更新或删除查询，我会得到相同的 RollbackException。

我已经调试了选择查询，在它们抛出 RollBackException 之前，查询得到了很好的结果，并且在函数结束时抛出了异常。此外，如果我使用 EntityManager 的 find() 获取实体并且服务方法没有 @Transactional 注释，则工作正常，但如果我将其设为事务性，它会因相同的异常而崩溃。

我拥有的所有实体都会发生这种情况，但我用它来解释问题。

我认为我的 Spring 配置有问题，但我不知道是什么。

这是异常的完整跟踪（在某些行中有对 AuthenticationSuccessHandler 类的引用，因为它是我调用服务类的地方）：

WARNING: StandardWrapperValve[default]: PWC1406: Servlet.service() for servlet default threw exception
org.springframework.transaction.UnexpectedRollbackException: JTA transaction unexpectedly rolled back (maybe due to a timeout); nested exception is javax.transaction.RollbackException: Transaction marked for rollback.
    at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:845)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:662)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:632)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:314)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
    at com.citius.reservas.service.service$$EnhancerByCGLIB$$37b50d4.tryJPAFind(<generated>)
    at com.citius.reservas.AuthenticationSuccessHandlerImpl.onAuthenticationSuccess(AuthenticationSuccessHandlerImpl.java:47)
    ...
Caused by: javax.transaction.RollbackException: Transaction marked for rollback.
    at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:428)
    at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit(JavaEETransactionManagerSimplified.java:855)
    at com.sun.enterprise.transaction.UserTransactionImpl.commit(UserTransactionImpl.java:208)
    at org.springframework.transaction.jta.JtaTransactionManager.doCommit(JtaTransactionManager.java:842)
    ... 45 more

我有以下实体：

@Entity
@Table(name = "roles", catalog = "reservas")
@XmlRootElement
public class Role implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @NotNull
    @Size(min = 1, max = 50)
    private String name;

    private static final long serialVersionUID = 1L;

GenericRepository，一个通用类，由所有存储库实现：

public class GenericRepositoryImpl<T> implements GenericRepository<T> {

    @PersistenceContext
    private EntityManager em;

    private Class<T> type;

    public GenericRepositoryImpl( ){
        Type t = getClass().getGenericSuperclass();
        ParameterizedType pt = (ParameterizedType) t;
        type = (Class) pt.getActualTypeArguments()[0];
    }

    @Override
    public T find(Object pk) {
        try{
            return em.find(type, pk);
        }catch(java.util.NoSuchElementException ex){
            return null;
        }
    }

    @Override
    public T create(T t) {
        em.persist(t);
        em.flush();
        em.refresh(t);
        return t;
    }

    @Override
    public List<T> query(Query q) {
        List<T> list= q.getResultList();
        if(list==null)
            list=new ArrayList<T>();        
        return list;
    }
}

这是角色存储库：

@Repository
public class RoleRepositoryImpl extends GenericRepositoryImpl<Role> 
    implements RoleRepository{

    @PersistenceContext
    private EntityManager em;

    @Override
    public Role findByName(String name) {
        Query q = (Query) this.em.createNamedQuery("Role.findByName");
        q.setParameter("name", name);
        Role r = (Role) q.getSingleResult();
        return r;
    }

    @Override
    public List<Role> findAll() {
        Query q = (Query) this.em.createNamedQuery("Role.findAll");
        return this.query(q);
    }
}

服务类：

@Service
public class service {

    @Autowired
    private RoleRepository roleRepository;

    @Transactional
    //This throws a RollBackException
    public void tryJPAEmpty(){

        roleRepository.findByName("example");
    }

    //This doesn't
    public Role tryJPAFind(){
        return roleRepository.find(new Integer(1));
    }
}

Spring配置（applicationContext.xml）是：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:jpa="http://www.springframework.org/schema/data/jpa"
       xmlns:tx="http://www.springframework.org/schema/tx" 
       xmlns:jee="http://www.springframework.org/schema/jee"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
          http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
          http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
          http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
">
    <context:component-scan base-package="com.***.***" />

    <jpa:repositories base-package="com.***.***.repositories" />

    <tx:annotation-driven />
    <tx:annotation-driven transaction-manager="transactionManager" />
    <context:annotation-config />

    <beans>
        <bean id="EntityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
            <property name="persistenceUnitName" value="JPAReservas"/>
        </bean>

        <bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

        <bean id="transactionManager" 
            class="org.springframework.transaction.jta.JtaTransactionManager" >
            <property name="allowCustomIsolationLevels">
                <value>true</value>
            </property>
        </bean>
    </beans>
</beans>

Persistence.xml（我在 GlassFish 服务器中创建了一个数据源和一个连接池）：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence  
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">

  <persistence-unit name="JPAReservas" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>Reservas_mysql</jta-data-source>

    <!--Named queries-->
    <mapping-file>META-INF/mapping/Role.xml</mapping-file>

    <exclude-unlisted-classes>false</exclude-unlisted-classes>
  </persistence-unit>
</persistence>

最后，我在 xml 文件中命名了 queires，如下所示： SELECT r FROM Role r 

    <named-query name="Role.findByName">
        <query>SELECT r FROM Role r WHERE r.name = :name</query>
    </named-query>

我对 Spring 和 JPA 真的很陌生，所以如果您知道我可以做的一些改进或更改，请告诉我。

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1 回答 1

0

Ok, I've solved it changing transaction-type to RESOURCE_LOCAL, but at the beggining, Glassfish gives me a lot of troubles. That's the way I solved it:

I've add metadata-complete="true" to the header of web.xml. Here is explained why is this necesary:

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0" metadata-complete="true">

I've changed my persistence.xml, because with RESOURCE_LOCAL the application won't use the connection pool of Glassfish, I have to put information about database connection:

<persistence-unit name="JPAReservas" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <mapping-file>META-INF/mapping/User.xml</mapping-file>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
      <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/reservas"/>
      <property name="javax.persistence.jdbc.user" value="admin"/>
      <property name="javax.persistence.jdbc.password" value="adminpassword"/>
    </properties>
  </persistence-unit>

And at the end, I've changed the applicationContext.xml (Spring configuration), because I can't use the same EntityManager class with RESOURCE_LOCAL as with JTA:

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
       <property name="entityManagerFactory" ref="EntityManagerFactory" />
</bean>

And that's all. I don't know why I can't use JTA like I was doing before, but I've solved it!!! :). Thank you!

于 2013-05-15T11:48:42.710 回答