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Java 自定义注解结合 Aop 切面和本地缓存实现接口防重复请求提交

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Aop 切面和本地缓存实现接口防重复请求提交

自定义注解类

 

 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target;   /** * 重复请求 * * @Author: * @Date: */ @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface NoRepeatRequest { }

 

缓存配置类

这边本地缓存用的是google guava cache，缓存有效期是3秒。

 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 import com.google.common.cache.Cache; import com.google.common.cache.CacheBuilder; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration;   import java.util.concurrent.TimeUnit;   /** * @Author: * @Date: */ @Configuration public class CacheConfig {       @Bean     public Cache repeatCache(){         final Cache<Object, String> repeatCache = CacheBuilder.newBuilder()                 // cache的初始大小                 .initialCapacity(20)                 // 并发数                 .concurrencyLevel(10)                 // cache中的数据在写入之后的存活时间为3秒                 .expireAfterWrite(3, TimeUnit.SECONDS)                 .build();         return repeatCache;     }   }

 

切面类

 

 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 import cn.hutool.core.util.ArrayUtil; import com.google.common.cache.Cache; import com.ls.uem.emer.command.common.exception.CommandErrorCode; import lombok.extern.slf4j.Slf4j; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component;   /** * 防重复请求 * * @Author: * @Date: */ @Aspect @Slf4j @Component public class NoRepeatRequestAspect {     @Autowired     private Cache<Object, Object> repeatCache;       @Pointcut("@annotation(com.sww.annotation.NoRepeatRequest)")     public void noRepeat() {     }       @Around("noRepeat()")     public Object repeatRequestCheck(ProceedingJoinPoint joinPoint) throws Throwable {         Object result;           Object[] args = joinPoint.getArgs();         if (ArrayUtil.isNotEmpty(args)){             Object key = args[0];             log.info("防重复请求缓存实时数量：{}", repeatCache.size());             if (repeatCache.getIfPresent(key) == null){                 repeatCache.put(key, System.currentTimeMillis());                 result = joinPoint.proceed();             } else{                 throw new BizServiceException(ErrorCode.REPEAT_REQUEST.getDesc());             }         } else{             result = joinPoint.proceed();         }           return result;     } }

 

接口

 

   
1 2 3 4 5 6 7 8 9 10 11 /**      *      * @param vo      * @return      */     @PostMapping("/tttt")     @NoRepeatRequest     public JsonResult tttt(@RequestBody @Valid TestVO vo) {         commandService.save(vo);         return JsonResult.success();     }
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