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
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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 {
}
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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。
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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;
}
}
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切面类
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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;
}
}
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接口
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/**
*
* @param vo
* @return
*/
@PostMapping("/tttt")
@NoRepeatRequest
public JsonResult tttt(@RequestBody @Valid TestVO vo) {
commandService.save(vo);
return JsonResult.success();
}
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