按主键/外键搜索时启用休眠过滤器答案

【问题标题】：Enable Hibernate filter when search by primary/foreign keys按主键/外键搜索时启用休眠过滤器
【发布时间】：2016-01-10 13:10:51
【问题描述】：

我使用 spring data 和 hibernate @Filter/@FilterDef 来过滤软删除的实体。即使 id 被软删除， springRepository.findOne(id) 似乎总是返回值。此方法的 where 子句中不包含过滤器，也不用于通过另一个外键字段进行搜索。在这种情况下是否可以启用过滤器，以便将其用作 @Where 注释？

【问题讨论】：

标签： java hibernate filter spring-data

【解决方案1】：

我遇到了同样的问题。我通过实现 HibernatePersistenceProvider 和 HibernateEntityManagerFactory 类解决了这个问题。

public class FilterEnableHibernatePersistenceProvider extends HibernatePersistenceProvider {

    @Override
    public EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) {
        return wrapEntityManagerFactory(super.createEntityManagerFactory(persistenceUnitName, properties));
    }

    @Override
    public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo info, Map properties) {
        return wrapEntityManagerFactory(super.createContainerEntityManagerFactory(info, properties));
    }

    private EntityManagerFactoryWrapper wrapEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
        return entityManagerFactory == null
            ? null
            : new EntityManagerFactoryWrapper(entityManagerFactory);
    }


public static class EntityManagerFactoryWrapper implements HibernateEntityManagerFactory {

    //This is where the filters are being activated
    protected EntityManager initSession(EntityManager entityManager) {
        Session session = ((HibernateEntityManager) entityManager).getSession();
        if (session.getEnabledFilter(FILTER_NAME) == null) {
            Filter activeFilter = session.enableFilter(FILTER_NAME);
            activeFilter.setParameter("some_field", some_value);
        }
        return entityManager;
    }

    // wrapp other methods

}

在每次会话初始化后，过滤器将被启用。现在您只需将 FilterEnableHibernatePersistenceProvider 添加到您的配置类：

@Configuration
public class JpaConfiguration {

@Bean()
public LocalContainerEntityManagerFactoryBean entityManagerFactory(){
    LocalContainerEntityManagerFactoryBean emFactory = new LocalContainerEntityManagerFactoryBean();
    emFactory.setPersistenceProviderClass(FilterEnableHibernatePersistenceProvider.class);
    //yours configuration
}

【讨论】：