Question

好吧，我的项目是使用EJB和JPA（使用Hibernate），但我不得不切换到Spring。在那之前一切都运转良好。 EJB用于注入EntityManager，控制事务等。

好的，当我切换到Spring时，我遇到了很多问题，因为我是Spring的新手。但是在一切运行之后，我遇到了问题：数据永远不会保存在数据库中。我配置我的Spring来控制事务，我在JSF中使用了spring bean，它有弹簧服务来完成这项工作。此服务注入了EntityManager并使用@Transactional REQUIRED。此服务将EntityManager传递给调用entityManager.persist（bean）的DAO。

选择似乎运行良好，JTA事务似乎运行良好（我在日志中看到），但实体未保存！

这是日志：

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter: doFilterInternal() (linha 136): Opening JPA EntityManager in OpenEntityManagerInViewFilter

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.beans.factory.support.DefaultListableBeanFactory: doGetBean() (linha 245): Returning cached instance of singleton bean 'transactionManager'

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: getTransaction() (linha 365): Creating new transaction with name [br.org.cni.pronatec.controller.service.MontanteServiceImpl.adicionarValor]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doBegin() (linha 493): Opened new Session [org.hibernate.impl.SessionImpl@2b2fe2f0] for Hibernate transaction

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doBegin() (linha 504): Preparing JDBC Connection of Hibernate Session [org.hibernate.impl.SessionImpl@2b2fe2f0]

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doBegin() (linha 569): Exposing Hibernate transaction as JDBC transaction [com.sun.gjc.spi.jdbc40.ConnectionHolder40@3bcd4840]

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler: doJoinTransaction() (linha 383): Joined JTA transaction


INFO: Hibernate: 
    select
        hibernate_sequence.nextval 
    from
        dual

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: processCommit() (linha 752): Initiating transaction commit

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doCommit() (linha 652): Committing Hibernate transaction on Session [org.hibernate.impl.SessionImpl@2b2fe2f0]

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doCleanupAfterCompletion() (linha 734): Closing Hibernate Session [org.hibernate.impl.SessionImpl@2b2fe2f0] after transaction

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.SessionFactoryUtils: closeSession() (linha 800): Closing Hibernate Session

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter: doFilterInternal() (linha 154): Closing JPA EntityManager in OpenEntityManagerInViewFilter

INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.jpa.EntityManagerFactoryUtils: closeEntityManager() (linha 343): Closing JPA EntityManager

在日志中，我看到它提交了事务，但我没有看到插入查询（Hibernate正在打印任何查询）。我还看到Hibernate查找以获取序列ID的下一个值。但在那之后，它永远不会真正插入。

这是弹簧上下文配置：

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="PronatecPU" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="loadTimeWeaver">
    <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
</property>
<property name="jpaProperties">
    <props>
    <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</prop>
    </props>
</property>
</bean>


<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" >
    <property name="transactionManagerName" value="java:/TransactionManager" />
<property name="userTransactionName" value="UserTransaction" />
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />


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

这是我的persistence.xml：

<?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="PronatecPU" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>jdbc/pronatec</jta-data-source>
    <class>br.org.cni.pronatec.model.bean.AgendamentoBuscaSistec</class>
    <class>br.org.cni.pronatec.model.bean.AgendamentoExportacaoZeus</class>
    <class>br.org.cni.pronatec.model.bean.AgendamentoImportacaoZeus</class>
    <class>br.org.cni.pronatec.model.bean.Aluno</class>
    <class>br.org.cni.pronatec.model.bean.Curso</class>
    <class>br.org.cni.pronatec.model.bean.DepartamentoRegional</class>
    <class>br.org.cni.pronatec.model.bean.Dof</class>
    <class>br.org.cni.pronatec.model.bean.Escola</class>
    <class>br.org.cni.pronatec.model.bean.Inconsistencia</class>
    <class>br.org.cni.pronatec.model.bean.Matricula</class>
    <class>br.org.cni.pronatec.model.bean.Montante</class>
    <class>br.org.cni.pronatec.model.bean.ParametrosVingentes</class>
    <class>br.org.cni.pronatec.model.bean.TipoCurso</class>
    <class>br.org.cni.pronatec.model.bean.Turma</class>
    <class>br.org.cni.pronatec.model.bean.UnidadeFederativa</class>
    <class>br.org.cni.pronatec.model.bean.ValorAssistenciaEstudantil</class>
    <class>br.org.cni.pronatec.model.bean.ValorHora</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
      <property name="current_session_context_class" value="thread"/>
      <property name="hibernate.show_sql" value="true"/>
      <property name="hibernate.format_sql" value="true"/>
      <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect"/>
      <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.SunONETransactionManagerLookup"/>
      <property name="hibernate.hbm2ddl.auto" value="update"/>
    </properties>
  </persistence-unit>
</persistence>

这是我在托管bean中注入的服务：

@Service
@Scope("prototype")
@Transactional(propagation= Propagation.REQUIRED)
public class MontanteServiceImpl {
    // more code
    @PersistenceContext(unitName="PronatecPU", type= PersistenceContextType.EXTENDED)
    private EntityManager entityManager;
    // more code
    // The method that is called by another public method that do something before
    private void salvarMontante(Montante montante) {
        montante.setDataTransacao(new Date());

        MontanteDao montanteDao = new MontanteDao(entityManager);
        montanteDao.salvar(montante);
    }
    // more code
}

My MontanteDao继承了一个基础DAO，就像这样：

public class MontanteDao extends BaseDao<Montante> {

    public MontanteDao(EntityManager entityManager) {
        super(entityManager);
    }

}

在BaseDao中调用的方法是：

public void salvar(T bean) {
    entityManager.persist(bean);
}

就像你看到的那样，它只需选择注入的entityManager并调用persist（）方法。该事务由Spring控制，就像打印在日志中一样，但插入查询永远不会打印在日志中，也永远不会保存。

我对自己糟糕的英语感到抱歉。在此先感谢谁帮助。

编辑：调试，我看到在每个entityManager.persist（T）之后，在“insert”类型的actionQueue中排队了另一个动作。毕竟，它只是排队行动而且从不执行它们。有没有人遇到过这种问题？

Answer 1

尝试强制flush到数据库。

entityManager.flush();

Answer 2

好吧，我终于解决了我的问题。 JTA存在一些错误配置。我不知道会是什么，但我改为RESOURCE_LOCAL并且它有效。

我第一次尝试RESOURCE_LOCAL时，我遇到了Glassfish验证@PersistenceContext注释并抛出“无法解析与persistence-context-ref-name [...]相对应的持久性单元”的问题。然后我找到了一种禁用此验证的好方法：指定

metadata-complete=true

在我的web.xml上。它说“不要看注释，因为它没有必要”。好吧，Spring是我的容器，它本身就会查看注释并配置所需的内容。然后我不需要我的服务器这样做。

毕竟，我的配置如下所示：

的web.xml：

<web-app version="3.0"
     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"
      metadata-complete="true">

Spring的context.xml：

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceUnitName" value="PronatecPU" />
    <property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
    </property>
    </bean>

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

    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

    <tx:annotation-driven />

的persistence.xml：

<persistence-unit name="PronatecPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <non-jta-data-source>jdbc/pronatec</non-jta-data-source>
    <!-- ... -->

我注入的entityManager：

@PersistenceContext(type= PersistenceContextType.EXTENDED)
private EntityManager entityManager;

我希望这能帮助那些遇到同样问题的人。

Spring的EntityManager不会持久化

2 个答案: