如何使用spring+Hibernate对多租户设置实体进行自定义验证

Question

我试图在使用spring Hibernate的多租户设置中使用自定义ConstraintValidator实现来验证一个实体的字段。我们如何让自定义验证器承租人知道？验证器中的实体管理器和其他autowired bean始终为空。

实体类：

@Entity
@Table(name = "autoupdate_json")
public class AutoupdateJson {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;

@Column(name="autoupdate_id")
private String autoupdateId; 

@Column(name="deployment_json", length=10000)
@ValidateAutodeploymentConfig
@Convert(converter=JpaConverterJson.class)
private ApplyInputJson deploymentJson; 
}

`验证批注：

@Documented
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = {AutodeploymentConfigValidator.class})
public @interface ValidateAutodeploymentConfig {

String message() default "One or More of the Devices already have perpetual mode settings enabled. Please cancel the existing "
        + " deployment config to add a new one, Updates are not supported. ";

Class<?>[] groups() default {};

Class<? extends Payload>[] payload() default {};
}

验证器实现：

public class AutodeploymentConfigValidator
    implements ConstraintValidator<ValidateAutodeploymentConfig, ApplyInputJson> {

@PersistenceContext
EntityManager entityManager; 

@Autowired
DeviceRepository deviceRepository; 

@Override
public boolean isValid(ApplyInputJson value, ConstraintValidatorContext context) {
    List<String> deviceSerialNumbers = Arrays.asList(value.getDevices().getSerial());
    
    System.out.println("entityManager: " + entityManager);
    System.out.println("repo bean: " + deviceRepository);
}

两个sysout都为空。

Answer 1

实体管理器和设备存储库为空，因为AutoDeploymentConfigValidator不是来自spring上下文。它是由hibernate使用的默认约束验证工厂创建的，不使用arg构造函数。

尝试添加HibernatePropertiesCustomizer来告诉hibernate要使用哪个验证工厂。类似于：

@Component
public class HibernateCustomizer implements HibernatePropertiesCustomizer {

    private final ValidatorFactory validatorFactory;

    public HibernateCustomizer(ValidatorFactory validatorFactory) {
        this.validatorFactory = validatorFactory;
    }

    public void customize(Map<String, Object> hibernateProperties) {
        hibernateProperties.put("javax.persistence.validation.factory", validatorFactory);
    }
}

这样，您就可以在约束验证器中使用实体管理器了。