Spring framework has a retry project that is very useful when you have a business logic failure that you want to be able to retry to complete.

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

@Configuration
@EnableRetry
public class GlobalConfig {

}

@Service
@Slf4j
public class UserServiceImp implements UserService {

    @Retryable(value = {RuntimeException.class}, maxAttempts = 3, backoff = @Backoff(delay = 2000))
    @Override
    public boolean sendEmail(User user) throws RuntimeException {
        log.info("send email");
        if (true) {
            throw new RuntimeException("error");
        }

        return false;
    }

    @Recover
    @Override
    public boolean recover(RuntimeException e, User user) {
        log.info("recover");
        return true;
    }

}