Spring Boot 正常关闭事务中

Question

我正在开发一个执行敏感支付处理的 spring-boot 服务，并希望确保在不中断这些交易的情况下关闭应用程序。好奇如何在 spring-boot 中最好地解决这个问题。

我阅读了有关向 spring-boot 添加关闭挂钩的信息，我在想也许可以在类上使用 CountDownLatch 来检查线程是否已完成处理 - 如下所示：

@Service
public class PaymentService {

    private CountDownLatch countDownLatch;

    private void resetLatch() {
        this.countDownLatch = new CountDownLatch(1);
    }

    public void processPayment() {
        this.resetLatch();

        // do multi-step processing

        this.CountDownLatch.countDown();
    }

    public void shutdown() {
        // blocks until latch is available 
        this.countDownLatch.await();
    }
}

// ---

@SpringBootApplication
public class Application {
    public static void main(String[] args) {

        // init app and get context
        ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);

        // retrieve bean needing special shutdown care
        PaymentService paymentService = context.getBean(PaymentService.class);

        Runtime.getRuntime().addShutdownHook(new Thread(paymentService::shutdown));
    }
}

非常感谢您提供建设性的反馈 - 谢谢。

Answer 1

我最终在关机方法上使用了@PreDestroyannotation：

@Service
public class PaymentService {

    private CountDownLatch countDownLatch;

    private synchronized void beginTransaction() {
        this.countDownLatch = new CountDownLatch(1);
    }

    private synchronized void endTransaction() {
        this.countDownLatch.countDown();
    }

    public void processPayment() {
        try {
            this.beginTransaction();

            // - - - - 
            // do multi-step processing
            // - - - -

        } finally {
            this.endTransaction();
        }
    }

    @PreDestroy
    public void shutdown() {
        // blocks until latch is available 
        this.countDownLatch.await();
    }
}