spring - 如何使 AuditorAware 与 Spring Data Mongo Reactive 一起工作

Question

Spring Security 5 提供了一个 ReactiveSecurityContextHolder to fetch the SecurityContext from a Reactive context ，但是当我想实现 AuditorAware并自动获得试镜工作，但它不起作用。 目前我找不到 Reactive AuditorAware 的变体 .

@Bean
public AuditorAware<Username> auditor() {
    return () -> ReactiveSecurityContextHolder.getContext()
        .map(SecurityContext::getAuthentication)
        .log()
        .filter(a -> a != null && a.isAuthenticated())
        .map(Authentication::getPrincipal)
        .cast(UserDetails.class)
        .map(auth -> new Username(auth.getName()))
        .switchIfEmpty(Mono.empty())
        .blockOptional();
}

我已添加 @EnableMongoAuduting在我的 Boot 上 Application类(class)。
在 Mongo 文档类上。我添加了与试听相关的注释。

@CreatedDate
private LocalDateTime createdDate;

@CreatedBy
private Username author;

当我添加帖子时， createdDate已填充，但作者为空。

{"id":"5a49ccdb9222971f40a4ada1","title":"my first post","content":"content of my first post","createdDate":"2018-01-01T13:53:31.234","author":null}

完整代码为 here ，基于 Spring Boot 2.0.0.M7。
更新: Spring Boot 2.4.0-M2/Spring Data Common 2.4.0-M2/Spring Data Mongo 3.1.0-M2 包含一个 ReactiveAuditorAware , 检查 this new sample , 备注 :使用 @EnableReactiveMongoAuditing激活它。

Answer 1

我正在发布另一个解决方案，该解决方案使用输入 id 来支持更新操作:

@Component
@RequiredArgsConstructor
public class AuditCallback implements ReactiveBeforeConvertCallback<AuditableEntity> {

    private final ReactiveMongoTemplate mongoTemplate;

    private Mono<?> exists(Object id, Class<?> entityClass) {
        if (id == null) {
            return Mono.empty();
        }
        return mongoTemplate.findById(id, entityClass);
    }

    @Override
    public Publisher<AuditableEntity> onBeforeConvert(AuditableEntity entity, String collection) {
        var securityContext = ReactiveSecurityContextHolder.getContext();
        return securityContext
                .zipWith(exists(entity.getId(), entity.getClass()))
                .map(tuple2 -> {
                    var auditableEntity = (AuditableEntity) tuple2.getT2();
                    auditableEntity.setLastModifiedBy(tuple2.getT1().getAuthentication().getName());
                    auditableEntity.setLastModifiedDate(Instant.now());
                    return auditableEntity;
                })
                .switchIfEmpty(Mono.zip(securityContext, Mono.just(entity))
                        .map(tuple2 -> {
                            var auditableEntity = (AuditableEntity) tuple2.getT2();
                            String principal = tuple2.getT1().getAuthentication().getName();
                            Instant now = Instant.now();
                            auditableEntity.setLastModifiedBy(principal);
                            auditableEntity.setCreatedBy(principal);
                            auditableEntity.setLastModifiedDate(now);
                            auditableEntity.setCreatedDate(now);
                            return auditableEntity;
                        }));
    }
}