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我有一个使用 Spring 3.2.3 和 Hibernate 4.2.1.Final 的应用程序。我做了一些配置,应用程序在测试环境中运行良好,使用 HSQLDB 等。

但是当应用程序被部署时,它几乎可以正常工作。实体已创建但从未持久化。我可以看到 JPA 日志:

休眠:选择 nextval ('TASK_SEQ')

但是插入永远不会出现=(

使用配置:

 <?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-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/tx
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">

    <context:component-scan base-package="br.com.company" />

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="spring_pu" />
    </bean>

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

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

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

</beans>

持久性.xml

<?xml version="1.0" encoding="UTF-8"?>
<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_2_0.xsd"
    version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="spring_pu" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <class>br.com.company.core.entities.Task</class>
        <properties>
                <property name="hibernate.connection.autocommit" value="true" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
        <property name="hibernate.hbm2ddl.auto" value="update" />

            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver" />
            <property name="hibernate.connection.url" value="jdbc:postgresql://127.0.0.1:5432/companyDB" />
            <property name="hibernate.connection.user" value="postgres" />
            <property name="hibernate.connection.password" value="*****" />
        </properties>
    </persistence-unit>
</persistence> 

实体:

@Entity
@Table(name = "TASK")
public class Task implements Serializable {

    private static final long serialVersionUID = -6262731134419520342L;

    @Id
    @Column(name = "ID")
    @GeneratedValue(generator = "TASK_SEQ", strategy = GenerationType.SEQUENCE)
    @SequenceGenerator(sequenceName = "TASK_SEQ", name = "TASK_SEQ")
    private long id;

    @Column(name = "DESCRIPTION")
    private String description;

    @Column(name = "FINISHED")
    private boolean fininshed;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "FINISH_DATE")
    private Date finishDate;

//getters and setter below
}

最后是服务:

@Service
public class TaskService {

    @PersistenceContext
    private EntityManager entityManager;

    @Transactional(propagation = Propagation.REQUIRED)
    public void createTask(Task task) {
    <b>//invoked method</b>
        entityManager.persist(task);
    }

正如我所说,没有抛出异常,但实体不会像在测试中那样持久化。谢谢!

编辑:我还尝试将persistence.xml内容删除到spring数据源中,问题仍然相同:

<?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-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/tx
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd  
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">

    <bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
        <property name="driverClassName" value="org.postgresql.Driver" />
        <property name="url" value="jdbc:postgresql://127.0.0.1:5432/KCILDS" />
        <property name="username" value="postgres" />
        <property name="password" value="*****" />
    </bean>

    <context:component-scan base-package="br.com.company" />

    <bean id="myEntityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="br.com.company.core.entities" />
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
        </property>
        <property name="jpaProperties">
            <props>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
            </props>
        </property>
    </bean>

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

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

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

</beans>

解决方案:

我放弃了xml配置。似乎没有什么可以再使用它了。阅读更多关于趋势和大量配置的信息,我最终成功地尝试了一个 java 配置,并进行了一些调整,这将非常适合。见下文:

    @Configuration
    @EnableTransactionManagement
    @ComponentScan("br.com.company")
    public class PersistenceJPAConfig {

        @Bean
        public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
            LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
            factoryBean.setDataSource(this.directDataSource());
            factoryBean.setPackagesToScan(new String[] { "br.com.company" });

            HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
            vendorAdapter.setShowSql(true);

            factoryBean.setJpaVendorAdapter(vendorAdapter);
            factoryBean.setJpaProperties(this.additionlProperties());

            return factoryBean;
        }

        private Properties additionlProperties() {
            Properties properties = new Properties();
            properties.put("database", "POSTGRESQL");
            properties.put("databasePlatform", "org.hibernate.dialect.PostgreSQLDialect");
            properties.put(Environment.SHOW_SQL, true);
            properties.put(Environment.FORMAT_SQL, true);
            return properties;
        }

// now reasearch how to make it an environment configuration
    //  @Bean
    //  public DataSource dataSource() {
    //      JndiDataSourceLookup jndiDataSourceLookup = new JndiDataSourceLookup();
    //      jndiDataSourceLookup.setResourceRef(true);
    //      return jndiDataSourceLookup.getDataSource("jdbc/mybank");
    //  }

        @Bean
        public DataSource directDataSource() {
            DriverManagerDataSource dataSource = new DriverManagerDataSource();
            dataSource.setDriverClassName("org.postgresql.Driver");
            dataSource.setUrl("jdbc:postgresql://127.0.0.1:5432/MyBank");
            dataSource.setUsername("postgres");
            dataSource.setPassword("*******");
            return dataSource;
        }

        @Bean //still trying to make a JTA Transaction
        public PlatformTransactionManager transactionManager() {
            JpaTransactionManager transactionManager = new JpaTransactionManager();
            transactionManager.setEntityManagerFactory(this.entityManagerFactoryBean().getObject());
            return transactionManager;
        }

        @Bean
        public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
            return new PersistenceExceptionTranslationPostProcessor();
        }
    }
4

4 回答 4

2

首先,您应该启用一个PersistenceAnnotationBeanPostProcessorbean,如下所示:

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

Spring 3.1.x 文档第 14.5.2 节所述

如果启用了 PersistenceAnnotationBeanPostProcessor,Spring 可以在字段和方法级别理解 @PersistenceUnit 和 @PersistenceContext 注释。

另一件事,确保你的TaskService被扫描。根据发布的 Spring 配置文件,仅br.com.company扫描包,因此TaskService应该在该包下。

编辑

您应该使用@Transactional实现. 默认情况下,建议注释由 Spring 通过简单的 Java实现,这需要一个接口。publicinterfaceProxy

第 8.1.3 节 AOP 代理中所述:

Spring AOP 默认为 AOP 代理使用标准 J2SE 动态代理。这使得任何接口(或一组接口)都可以被代理。

当然,这也意味着TaskService其他 bean 应该仅通过该接口引用它。

于 2013-07-14T23:16:37.330 回答
1

我遇到了与描述的问题类似的问题。我发现错误使用 @Transactional 表示法的问题,特别是我错误地使用了 javax.transaction.Transactional 而不是 org.springframework.transaction.annotation.Transactional

看看你的“@Service”的导入。

可以在javax.transaction.Transactional 与 org.springframework.transaction.annotation.Transactional中找到差异的详细描述

于 2015-01-12T23:56:46.247 回答
0

我会首先仔细检查一些明显的东西:Task 类型是 br.com.company.Task,而不是其他 java api Task 吗?

如果您仍然遇到同样的问题,那么您的事务管理可能有问题。坚持后尝试刷新 entityManager。通常 entityManager 应该在事务结束时自动刷新:

@Transactional(propagation = Propagation.REQUIRED)
public void createTask(Task task) {
  entityManager.persist(task);
  entityManager.flush(task);
}

如果您确实对事务管理器有问题,请尝试不要在 persistence.xml 中指定数据源,而是在 spring xml 上创建它并使用 JpaTransactionManager 的 dataSource 属性

还设置以下 log4j 记录器以查看事务开始/结束和由 hibernate 发出的 SQL:

log4j.logger.org.hibernate.SQL=DEBUG
log4j.logger.org.hibernate.transaction=DEBUG
于 2013-07-14T23:05:49.800 回答
0

由于TaskService定义为服务,因此 Spring 容器不会维护 CRUD 操作的事务。您应该将 CRUD 操作委托给另一个 bean——通常我会在它们后面加上 Managers。

所以这将是事务工作流的完整层次结构:

  1. 创建一个普通的bean。比方说TaskManager
  2. 将新创建的类注入TaskService

@Resource(name = "taskManager")

任务管理器任务管理器;

  3. EntityManager在新创建的 Manager 类中注入等

  4. 将所有 CRUD 方法放在管理器类中

  5. 从 Service 调用这些方法

调用层次结构:Service -> Manager -> DAO -> Entity Manager

现在你应该能够持久化你的实体了。

于 2013-07-14T20:55:38.820 回答