Spring启动优雅关闭中间事务

Question

我正在进行一项执行敏感支付处理的春启动服务，并希望确保该应用程序的任何关机都不会中断这些事务。好奇如何最好地解决这个在春季启动。

我读过关于在spring中添加关闭钩子的文章，我想也许可以在类上使用一个CountDownLatch来检查线程是否已经完成了处理--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));
    }
}

我们非常感谢建设性的反馈--谢谢。

Answer 1

最后，我在关闭方法上使用了@PreDestroy 注解：

@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();
    }
}