我在我的项目中遇到了一个问题: entityManager.flush() 没有做任何事情,并且在退出 EJB 时,仅在提交之前完成刷新。
我的项目在 WebSphere 7 上运行。我通过 OpenJPA 使用 JPA2。我正在使用 Spring 进行自动装配。我正在使用容器管理事务。
下面的相关代码片段
持久性.xml
<persistence-unit name="persistenceUnit" transaction-type="JTA">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<properties>
<property name="openjpa.TransactionMode" value="managed" />
<property name="openjpa.ConnectionFactoryMode" value="managed" />
<property name="openjpa.DynamicEnhancementAgent" value="true" />
<property name="openjpa.jdbc.DBDictionary" value="StoreCharsAsNumbers=false" />
<property name="openjpa.Log" value="SQL=TRACE"/>
</properties>
</persistence-unit>
应用程序上下文.xml
<!-- Configure a JPA vendor adapter -->
<bean id="openJpaVendorAdapter" class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter">
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
</bean>
<!-- Entity Manager -->
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/myappDS"/>
</bean>
<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
<property name="persistenceUnitName" value="persistenceUnit"/>
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter" ref="openJpaVendorAdapter" />
</bean>
EJB3 豆
@Stateless(name="JPABaseEntityServiceBean")
@Configurable
public class JPABaseEntityServiceBean implements JPABaseEntityService {
Logger logger = LoggerFactory.getLogger(JPABaseEntityServiceBean.class);
@Autowired
JPABaseEntityDao jpaBaseEntityDao;
public JPABaseEntity persist(JPABaseEntity jpaBaseEntity) {
return jpaBaseEntityDao.persist(jpaBaseEntity);
}
道:
@Repository
public class JPABaseEntityDao implements BaseEntityDao {
@PersistenceContext
transient EntityManager entityManager;
public JPABaseEntity persist(JPABaseEntity jpaBaseEntity) {
Date now = new Date();
jpaBaseEntity.setCreatedBy(TO_DO_ME);
jpaBaseEntity.setUpdatedBy(TO_DO_ME);
jpaBaseEntity.setUpdatedOn(now);
jpaBaseEntity.setCreatedOn(now);
entityManager.persist(jpaBaseEntity);
entityManager.flush();
return jpaBaseEntity;
}
仅在离开 EJB 时才执行“插入”,这意味着 DAO 内的 entityManager.flush() 不起作用