README.md

Validation Module

We are using bean validation as validation library. The problem with bean validation, it's not reactive. Some times we need reactive code to do validation, such as : call mongo repository to check is email unique or not. Validation module is module helper to support reactive code on validation layer.

Setup Dependency

<dependency>
  <groupId>com.blibli.oss</groupId>
  <artifactId>blibli-backend-framework-validation</artifactId>
</dependency>

Create ConstraintValidator

When using bean validation, if we want to create custom validator, we will implement ConstraintValidator interface. Now we only need to implement interface ReactiveConstraintValidator or extend class AbstractReactiveConstraintValidator.

public class MustValidValidator extends AbstractReactiveConstraintValidator<MustValid, String> {

   @Override
   public Mono<Boolean> validate(String value, MustValid annotation, ConstraintValidatorContext context) {
     return Mono.fromCallable(() -> "EKO".equals(value));
   }
 }