Soring Data Reactive: Criteria API reactive - spring-data

Question

I'm moving my repositories into reactive repositories.
I'm using webflux:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-r2dbc</artifactId>
</dependency>
Here my class:
#RequiredArgsConstructor
public class QdCFCriteriaRepository {
#PersistenceContext
private final EntityManager entityManager;
private final SessionFactory sessionFactory;
#Override
public List<QdCF> findByDataBaixaNull() {
CriteriaBuilder criteriaBuilder = this.entityManager.getCriteriaBuilder();
CriteriaQuery<QdCF> criteriaQuery = criteriaBuilder.createQuery(QdCF.class);
Root<QdCF> qdcf = criteriaQuery.from(QdCF.class);
Predicate dataBaixaPredicate = criteriaBuilder.isNull(qdcf.get("dataBaixa"));
criteriaQuery = criteriaQuery.where(dataBaixaPredicate);
TypedQuery<QdCF> query = this.entityManager.createQuery(criteriaQuery);
return query.getResultList();
}
}
I don't quite figure out how to move this criteria code to reactive criteria code.
I mean, How could I get a Mono of List<QdCF>?

Answer 1

Spring Data JPA does not support the Spring WebFlux. If you like Hibernate/JPA APIs and stick on the WebFlux statck, try to use Hibernate Reactive instead.
Unfortunately Spring Data team have no plan to integrate Hibernate Reactive, see:
https://github.com/spring-projects/spring-data-relational/issues/1178
https://github.com/spring-projects/spring-data-jpa/issues/2503
Reading my blog to integrate Hibernate Reactive with Spring yourself, it is just a piece of cake if you are familiar with Spring.