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那麼，我的項目使用EJB和JPA（與Hibernate），但我不得不切換到Spring。 在此之前，一切都很順利。用於注入EntityManager的EJB，控制事務處理等。Spring的EntityManager不持久
好的，當我切換到Spring時，我遇到了很多問題，因爲我是Spring的新手。但是在一切運行之後，我遇到了這樣的問題：數據永遠不會保存在數據庫中。我配置了我的Spring來控制事務，我在JSF中使用了spring bean，它擁有可以很好地工作的spring服務。這個服務有一個EntityManager注入並使用@Transactional REQUIRED。該服務將EntityManager傳遞給調用entityManager.persist（bean）的DAO。
選擇似乎工作正常，JTA事務似乎很好地工作（我在日誌中看到），但實體沒有保存！
這裏是日誌：
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 [[email protected]] 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 [[email protected]]
INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doBegin() (linha 569): Exposing Hibernate transaction as JDBC transaction [[email protected]]
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 [[email protected]]
INFO: [Pronatec] - 04/04/2012 11:30:20 - [DEBUG] org.springframework.orm.hibernate3.HibernateTransactionManager: doCleanupAfterCompletion() (linha 734): Closing Hibernate Session [[email protected]] 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
在日誌中，我看到它commiting交易，但我沒有看到插入查詢（Hibernate的是印刷任何查詢）。我也看到Hibernate查找獲得序列ID的下一個值。但在此之後，它從未真正插入。
這裏是Spring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" />
這裏是我的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>
這裏是我的服務，爲託管bean注入：
@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
}
我的MontanteDao繼承了基本的DAO，像這樣：
public class MontanteDao extends BaseDao<Montante> {
public MontanteDao(EntityManager entityManager) {
super(entityManager);
}
}
這就是所謂的BaseDao的方法是這樣的：
public void salvar(T bean) {
entityManager.persist(bean);
}
就像你所看到的，它只是挑注入的EntityManager並調用persist（）方法。事務由Spring控制，就像打印在日誌中一樣，但插入查詢從不打印在日誌中，並且永遠不會保存。
對不起我的英語不好。 在此先感謝誰幫助。
編輯： 調試，我看到在每個entityManager.persist（T）之後，在insert類型的actionQueue中插入了另一個動作。畢竟，它只是對行爲排隊，而且從不執行它們。有沒有人已經遇到過這種問題？
你確定關於transactionManager的配置。日誌（HibernateTransactionManager）中的類名稱與您在Spring xml中的內容不匹配（JPATransactionManager） – gkamal 2012-04-04 18:06:07
我不知道它是否正常，但我認爲是。日誌的第二行顯示了Spring注入TransactionManager。 – 2012-04-05 11:22:59
更改TransactionManger bean以使用JPATransactionManager或使用