java – 返回Mono后的方法调用

 @Override
 public Mono<Void> sendEmail(EmailDto emailDto) {
 return mailReactiveClient.sendEmail(message ->
     createMessage(emailDto, emailDto.getBody(), message))
       .doOnNext(saveNotificationLog(emailDto)); //it's not work
}

  private void saveNotificationLog(EmailDto emailDto) {
    notificationLogReactiveRepository.save(NotificationLog.builder()
       ...
      .build());
  }

方法sendEmailreturns Mono< Void>.

那么如何调用saveNotificationLog？

UPD：让我的问题更简单：

 @Override
 public Mono<Void> sendEmail(EmailDto emailDto) {
 return mailReactiveClient.sendEmail(message ->
     createMessage(emailDto, emailDto.getBody(), message))
       .doOnNext(System.out.print("Hello world!"); 
}

如何在sendEmail返回Mono< Void>后调用doOnNextor类似的方法？

在您的代码示例中,notificationLogReactiveRepository.save返回Mono< Void>. saveNotificationLog返回void,并且不订阅notificationLogReactiveRepository.save返回的发布者.这意味着通知将不会被保存,因为nothing happens until you subscribe.

在这种情况下,似乎你正在尝试连锁操作 – 然后操作符就是为此而做的.您的代码应如下所示：

@Override
public Mono<Void> sendEmail(EmailDto emailDto) {
    return mailReactiveClient.sendEmail(message ->
        createMessage(emailDto, emailDto.getBody(), message))
           .then(saveNotificationLog(emailDto));
}

private Mono<Void> saveNotificationLog(EmailDto emailDto) {
    return notificationLogReactiveRepository.save(NotificationLog.builder()
        ...
        .build());
}