利用redis实现分布式请求防重复提交

2019独角兽企业重金招聘Python工程师标准>>>

1.自定义注解类Token

@Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface Token {String flag() default ""; }

2.在需要拦截的路径上加自定义注解

@Token @RequestMapping(value = "/pda/pick-task/list") public RespJson getPickTask(@RequestParam("whNo") String whNo,@RequestParam(value = "sourceType", required = false) Integer sourceType,@RequestParam(value = "retrieveValue", required = false) String retrieveValue,@RequestParam(value = "realTimePick", required = false, defaultValue = "0") int realTimePick,@RequestParam(value = "taskGroupNo", required = false) String taskGroupNo) { ...

3.利用切面拦截请求

@Aspect @Component public class MethodInterceptor {private Logger logger = LoggerFactory.getLogger(MethodInterceptor.class); /*** 重复请求拦截** @param joinPoint* @return* @throws Throwable*/ @Around("@annotation(com.haiziwang.kwms.common.annotation.Token)") public Object repeatRequestAround(ProceedingJoinPoint joinPoint) throws Throwable {MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();Method currentMethod = joinPoint.getTarget().getClass().getMethod(methodSignature.getName(), methodSignature.getParameterTypes());IKMEMCache cache = KMemServiceImpl.getCache();//拼接签名StringBuilder signBuffer = new StringBuilder(currentMethod.getAnnotation(RequestMapping.class).value()[0]);Object[] args = joinPoint.getArgs();for (Object object : args) {if (object != null) {String str = "";try {str = JSONObject.toJSONString(object);} catch (Exception e) {}signBuffer.append("^").append(str);}}String tokenKey = signBuffer.toString();if (StringUtils.isNotBlank(cache.readFromHash(RedisKeyType.TOKEN.getName(), tokenKey))) {if (StringConstants.WCS.equals(currentMethod.getAnnotation(Token.class).flag())) {throw new WMS3CheckedException(WMS3ExceptionCode.WCS_REPEAT_REQUEST_EXCEPTION);}if (currentMethod.getReturnType() == RespJson.class) {throw new WMS3CheckedException(WMS3ExceptionCode.REPEAT_REQUEST_EXCEPTION);}if (currentMethod.getReturnType() == PageRespJson.class) {throw new WMS3CheckedException(WMS3ExceptionCode.REPEAT_REQUEST_PAGE_EXCEPTION);}}cache.write4Hash(RedisKeyType.TOKEN.getName(), tokenKey, "token");try {return joinPoint.proceed();} finally {cache.deleteHashFields(RedisKeyType.TOKEN.getName(), tokenKey);} }

 

转载于:https://my.oschina.net/u/2485283/blog/1859323

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