春季重试，无需春季申请 [英] Spring retry without spring application

问题描述

我有一个Java应用程序，它从主类开始(不是Spring Boot应用程序).我想使用Spring retry在连接丢失时重试. 据我所知，我需要在Spring应用程序的主类上方添加@EnableRetry批注，然后在我的方法上方使用@Retryable进行重试.但是我认为这在非​​Spring应用程序中将不起作用. 是否可以在简单的Java应用程序(而非spring应用程序)中使用spring retry?

I have a java application, which starts from the main class (not Spring boot application). And I want to use Spring retry to retry when a connection is lost. As I know I need to add @EnableRetry annotation above main class in Spring application and then use @Retryable above my method with retrying. But I think it will not work in the non-spring application. Is it possible to use spring retry in simple java application (not spring app)?

推荐答案

我发现我可以使用RetryTemplate:

I found that I can use RetryTemplate:

    RetryTemplate retryTemplate = new RetryTemplate();

    FixedBackOffPolicy fixedBackOffPolicy = new FixedBackOffPolicy();
    fixedBackOffPolicy.setBackOffPeriod(2000l);
    retryTemplate.setBackOffPolicy(fixedBackOffPolicy);

    SimpleRetryPolicy retryPolicy = new SimpleRetryPolicy();
    retryPolicy.setMaxAttempts(5);
    retryTemplate.setRetryPolicy(retryPolicy);

    retryTemplate.execute(new RetryCallback<Void, Throwable>() {
            @Override
            public Void doWithRetry(RetryContext context) throws Throwable {
                // do some job
                if(context.getRetryCount() < 3){ // unexpected disconnection
                    log.error("connection failed");
                    throw new RuntimeException("retry exception"); 
                }
                System.out.println("RETRY" + context);
                return null;
            }
        });

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