重试支持Spring Retry

引入maven依赖

<dependency>
    <groupId>org.springframework.retry</groupId>
    <artifactId>spring-retry</artifactId>
    <version>1.3.1.RELEASE</version>
</dependency>

添加@Retryable和@Recover注解

package com.test;

import org.springframework.remoting.RemoteAccessException;
import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.Recover;
import org.springframework.retry.annotation.Retryable;
import org.springframework.stereotype.Service;

@Service
public class TestService {

    @Retryable(value= {Exception.class},
    maxAttempts = 3,
    backoff = @Backoff(delay = 5000l,multiplier = 1))
    public void something() throws Exception {
        System.out.println("do something...");
        throw new Exception("调用异常");
    }

    @Recover
    public void recover(Exception e) {
        System.out.println(e.getMessage());
    }

}

• @Retryable注解
  被注解的方法发生异常时会重试
  value:指定发生的异常进行重试
  include:和value一样，默认空，当exclude也为空时，所有异常都重试
  exclude:指定异常不重试，默认空，当include也为空时，所有异常都重试
  maxAttemps:重试次数，默认3
  backoff:重试补偿机制，默认没有
• @Backoff注解
  delay:指定延迟后重试
  multiplier:指定延迟的倍数，比如delay=5000l,multiplier=2时，第一次重试为5秒后，第二次为10秒，第三次为20秒
• @Recover
  当重试到达指定次数时，被注解的方法将被回调，可以在该方法中进行日志处理。需要注意的是发生的异常和入参类型一致时才会回调

SpringBoot启动测试

package com.test;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.retry.annotation.EnableRetry;

@SpringBootApplication
@EnableRetry
public class TestApplication {
    
    @Autowired
    private TestService testService;
    
    @RequestMapping("/test")
    public String test() {
        testService.something();
        return "200";
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(TestApplication.class, args);
    }
    
}