spring-boot-realworld-example-app/src/main/java/io/spring/core/article/ArticleRepository.java

package io.spring.core.article;

import java.util.Optional;

public interface ArticleRepository {

    void save(Article article);

    Optional<Article> findById(String id);

    Optional<Article> findBySlug(String slug);


    void remove(Article article);
}