使用CDI Decorator装饰托管Validator时出错

Question

我有一个无状态的 Java EE 7 WebService，并且想要使用验证框架来验证传入的数据。这一切都很好。然后我想将任何 ConstraintViolationException 转换为对客户端更友好的东西，并认为装饰器将是理想的选择。

类似于下面的内容。然而，当我部署它时，ValidationInterceptor 抱怨它找不到 Validator 实现。这对我来说是有意义的。我已经能够通过拦截器来使功能正常工作，该拦截器在验证拦截器之前触发，并且可以捕获异常，但是装饰器方法似乎更干净一些。

我在这里缺少什么吗？我的背景主要是Spring，所以对CDI不太熟悉。

Exception while loading the app : CDI deployment failure:WELD-001408: Unsatisfied dependencies for type Validator with qualifiers @Default
      at injection point [UnbackedAnnotatedField] @Inject private org.hibernate.validator.cdi.internal.interceptor.ValidationInterceptor.validator
      at org.hibernate.validator.cdi.internal.interceptor.ValidationInterceptor.validator(ValidationInterceptor.java:0)
    WELD-001475: The following beans match by type, but none have matching qualifiers:
      - ValidatorBean [id=org.hibernate.validator.cdi.internal.ValidatorBean_hv]
     -- WELD-001408: Unsatisfied dependencies for type Validator with qualifiers @Default
      at injection point [UnbackedAnnotatedField] @Inject private org.hibernate.validator.cdi.internal.interceptor.ValidationInterceptor.validator
      at org.hibernate.validator.cdi.internal.interceptor.ValidationInterceptor.validator(ValidationInterceptor.java:0)
    WELD-001475: The following beans match by type, but none have matching qualifiers:
      - ValidatorBean [id=org.hibernate.validator.cdi.internal.ValidatorBean_hv]
    ]]

@Decorator
public abstract class ValidationDecorator implements Validator {
    private static final Logger logger = Logger.getLogger(ValidationDecorator.class.getName());
    
    //the predefine validator bean created by the container
    @Inject
    @Delegate
    private Validator validator;

    @Override
    public <T> Set<ConstraintViolation<T>> validate(T object, Class<?>... groups) {
        logger.log(Level.INFO, () -> String.format("Validation decorator validating %s", object));

        Set<ConstraintViolation<T>> violations = null;

        try {
            violations = validator.validate(object, groups);
        } catch (ConstraintViolationException ex) {
            try {
                // build a client friendly message
                SOAPFactory factory = SOAPFactory.newInstance();
                SOAPFault fault = factory.createFault("A validation error occurred", new QName("ValidationError"));

                throw new SOAPFaultException(fault);
            } catch (SOAPException e) {
                e.printStackTrace();
            }
        }

        return violations;
    }
}

Answer 1

您需要在可注入字段上使用

@Any

限定符 - 请参阅 CDI 规范的装饰器委托注入点部分。

// ...
@Inject
@Delegate
@Any
private Validator validator;
// ...