Spring Java配置未定义名为“Entity ManagerFactory”的bean

Question

我花了一天的时间想弄清楚，最后不得不求助于stackoverflow寻求专家的建议。

我正在使用java设置spring配置，使其具有两个datasources和两个LocalContainerEntityManagerFactoryBean，如下所示。但Spring默认情况下似乎会寻找entityManagerFactory（）和抛出异常（下面包含stacktrace）。我如何配置spring来使用我的entitymanagerfactories而不是默认名称。

@Bean(name="visionDataSource")
public DataSource visionDataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    // set properties..
    return dataSource;
}

@Bean(name="stormDataSource")
public DataSource visionDataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    // set properties..
    return dataSource;
}

  @Bean(name="visionentityManagerFactory")
public LocalContainerEntityManagerFactoryBean visionentityManagerFactory() {
    LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
    entityManagerFactoryBean.setDataSource(visionDataSource());
    //entityManagerFactoryBean.setPersistenceUnitManager(persistenceUnitManager());
    //entityManagerFactoryBean.setPersistenceXmlLocation(null);
    entityManagerFactoryBean.setPersistenceUnitName("visionEntityManagerFactory");
    entityManagerFactoryBean.setPersistenceProviderClass(HibernatePersistence.class);
    entityManagerFactoryBean.setPackagesToScan(env.getRequiredProperty(PROPERTY_NAME_ENTITYMANAGER_PACKAGES_TO_SCAN));
    entityManagerFactoryBean.setJpaProperties(hibProperties());
    entityManagerFactoryBean.afterPropertiesSet();
    System.out.println("*********************visionEntityManagerFactory********************");
    return entityManagerFactoryBean;
}

 @Bean(name="stormEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean stormEntityManagerFactory() {
    entityManagerFactoryBean.setDataSource(stormDataSource());
    // set other properties
    return entityManagerFactoryBean;
  }

错误日志：

原因：org.springframework.beans.factory.nosuchbeandefinition异常：在org.springframework.beans.factory.support.defaultlistablebeanfactory.getbeandefinition（defaultlistablebeanfactory.java:549)在org.springframework.beans.factory.support.abstractbeanfactory.getmergedlocalbeandefinition（abstractbeanfactory.1095)在

更新：我正在使用JPARepository

  public interface ContactRepository extends JpaRepository<Contact, Serializable> {
    List<Contact> findByCompanyId(int companyId);
  }

我已经尝试扩展一个自定义存储库，注入entitymanager，如下所示。但这也无济于事。

  public interface ContactRepository extends DefaultRepository<Contact, Serializable> {
    List<Contact> findByCompanyId(int companyId);
   }

@NoRepositoryBean
public class DefaultRepositoryImpl<T, ID extends Serializable> extends SmpleJpaRepository<T, ID> implements 
                        DefaultRepository<T,ID> {

@PersistenceContext(unitName="visionEntityManagerFactory")
private EntityManager entityManager;

/**
 * @param domainClass
 * @param em
 */
 public DefaultRepositoryImpl(Class<T> domainClass, EntityManager em) {
 super(domainClass, em);
 }

 /**
  * {@inheritDoc}
  */
 protected Object getTargetRepository(RepositoryMetadata metadata) {
     return new DefaultRepositoryImpl<T, ID>((Class<T>) metadata.getDomainType(), entityManager);
 }
 /**
  * {@inheritDoc}
  */
 protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {
     return DefaultRepository.class;
     }
  }

Answer 1

一个可能的解决方案。

public class MyRepositoryImpl extends JdbcDaoSupport implements MyRepository {

    @Qualifier("odsDataSource")
    @Autowired(required = true)
    private DataSource ds;

    public MyRepositoryImpl() {
    }

    @PostConstruct
    void postConstruct() {
        setDataSource(ds);
    }

    ...
}

如果您通过扩展JdbcDaoSupport（以及其他一些Spring提供的帮助程序）来开发存储库，那么它们将默认尝试在默认的“EntityManagerFactory”上按名称连接。因此您需要通过注入另一种名称的数据bean来初始化它们。

另一种可能性是假设您使用的是JPA。

@Repository
public class MyRepositoryImpl implements MyRepository {
    @PersistenceContext(unitName="MyPersistenceUnit")
    private EntityManager entityManager;

    public List<MyModel> findAll() {
        return entityManager.createNamedQuery("MyModel.findAll").getResultList();
    }
}