DropWizard非平凡配置验证

我有一个dropwizard配置类,它有两个属性。 必须至少设置一个。 也就是说,两者都是 @Nullable 我需要对整个对象进行验证。

    public class MessagingStreamConfiguration extends Configuration
    {
        @Nullable
        private URL baseUrl;

        @Nullable
        private LinkedHashMap<String, URL> baseUrls;
    }

这个配置类是整个应用程序配置的一个属性。

public class ClaConfiguration extends Configuration
{
    @Valid
    @JsonProperty("messagingStream")
    private MessagingStreamConfiguration messagingStreamConfiguration;

我建立了一个 javax.validation 为此:

/**
 * Additional validation for non-trivial cases.
 */
private boolean isValid() {
    return (this.getBaseUrl() == null
        && (this.getBaseUrls() == null || this.getBaseUrls().isEmpty()));
}


/**
 * javax.validation way of validating the whole class.
 */
public static class MessagingStreamConfigurationValidator implements ConstraintValidator<MessagingStreamConfigurationValid, MessagingStreamConfiguration>
{
    @Override
    public void initialize(MessagingStreamConfigurationValid constraintAnnotation) {

    }

    @Override
    public boolean isValid(MessagingStreamConfiguration conf, ConstraintValidatorContext context) {
        return conf.isValid();
    }
}

@Constraint(validatedBy = {MessagingStreamConfigurationValidator.class})
@Target({ElementType.TYPE})
@Retention(value = RetentionPolicy.RUNTIME)
public @interface MessagingStreamConfigurationValid
{
    String message() default "Neither baseUrl nor baseUrls is set. Set baseUrls.";
}

但对象的验证不会发生。只有个别领域。

这个 only relevant DropWizard tests I found , 2nd 也只处理字段。
数据仓库文档 doesn't talk about config validation 很多。

如何使dropwizard验证整个对象?