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This article mainly introduces the relevant knowledge of "how to use the spring retry method to call the failure retry mechanism". The editor shows you the operation process through the actual case, the operation method is simple, fast and practical. I hope this article "how to use the spring retry method to call the failure retry mechanism" can help you solve the problem.

Preface

Retry mechanisms are used in many scenarios, such as rpc service call failure retry, file upload oss failure retry, http API call failure retry, payment callback failure retry, and so on. All failures caused by network, illogical errors and other uncertain factors can be added to the retry mechanism to enhance the robustness of the system. Bloggers have also handled cases of file upload to the third party OSS service failure to increase retry. Before that, I didn't know that spring had a spring-retry project, so it was solved by limiting the number of recursive calls.

Now let's take a look at how spring-retry is used in the spring boot project to deal with the problem of failed retries.

1. Import dependency org.springframework.boot spring-boot-starter-aop org.springframework.retry spring-retry

Ps: don't leave out the spring-boot-starter-aop package

two。 Use of annotations / * * @ Retryable Annotation Parameter description * number of maxAttempts retries * value specifies exception retry * exclude excludes an exception and does not retry * * @ Backoff Note Parameter description * interval between backoff retries * / @ Retryable (maxAttempts=9,exclude = ArrayIndexOutOfBoundsException.class,value=Exception.class Backoff=@Backoff (delay = 1000) public String getResult (String name) {System.out.println ("attempt to call" + iTunes + "times") Name= name.split (",") [1111]; / / if (iTunes 8) {name= name.split (",") [1111]; / / exception testing} return name+ ": Hello!" ;} 3. Open the retry @ SpringBootApplication@EnableRetrypublic class BootRetryApplication {public static void main (String [] args) {SpringApplication.run (BootRetryApplication.class, args);}}

Ps: don't forget to turn on retry with the @ EnableRetry annotation

Add, manual declarative retry: public static void main (String [] args) {ProxyFactory factory = new ProxyFactory (HelloService.class.getClassLoader ()); factory.setInterfaces (HelloService.class); factory.setTarget (new HelloService () {@ Override public String say () {System.err.println ("hello"); if (1 declare 1) throw new SecurityException () Return "a";}}); HelloService service = (HelloService) factory.getProxy (); JdkRegexpMethodPointcut pointcut = new JdkRegexpMethodPointcut (); pointcut.setPatterns (". * say.*"); RetryOperationsInterceptor interceptor = new RetryOperationsInterceptor (); ((Advised) service) .addAdvisor (new DefaultPointcutAdvisor (pointcut, interceptor)); service.say () } this is the end of the introduction to "how to call the failure retry mechanism with the spring retry method". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.

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