对比新文件 |
| | |
| | | package com.iailab.framework.idempotent.core.aop; |
| | | |
| | | import com.iailab.framework.common.exception.ServiceException; |
| | | import com.iailab.framework.common.exception.enums.GlobalErrorCodeConstants; |
| | | import com.iailab.framework.common.util.collection.CollectionUtils; |
| | | import com.iailab.framework.idempotent.core.annotation.Idempotent; |
| | | import com.iailab.framework.idempotent.core.keyresolver.IdempotentKeyResolver; |
| | | import com.iailab.framework.idempotent.core.redis.IdempotentRedisDAO; |
| | | import lombok.extern.slf4j.Slf4j; |
| | | import org.aspectj.lang.ProceedingJoinPoint; |
| | | import org.aspectj.lang.annotation.Around; |
| | | import org.aspectj.lang.annotation.Aspect; |
| | | import org.springframework.util.Assert; |
| | | |
| | | import java.util.List; |
| | | import java.util.Map; |
| | | |
| | | /** |
| | | * 拦截声明了 {@link Idempotent} 注解的方法,实现幂等操作 |
| | | * |
| | | * @author iailab |
| | | */ |
| | | @Aspect |
| | | @Slf4j |
| | | public class IdempotentAspect { |
| | | |
| | | /** |
| | | * IdempotentKeyResolver 集合 |
| | | */ |
| | | private final Map<Class<? extends IdempotentKeyResolver>, IdempotentKeyResolver> keyResolvers; |
| | | |
| | | private final IdempotentRedisDAO idempotentRedisDAO; |
| | | |
| | | public IdempotentAspect(List<IdempotentKeyResolver> keyResolvers, IdempotentRedisDAO idempotentRedisDAO) { |
| | | this.keyResolvers = CollectionUtils.convertMap(keyResolvers, IdempotentKeyResolver::getClass); |
| | | this.idempotentRedisDAO = idempotentRedisDAO; |
| | | } |
| | | |
| | | @Around(value = "@annotation(idempotent)") |
| | | public Object aroundPointCut(ProceedingJoinPoint joinPoint, Idempotent idempotent) throws Throwable { |
| | | // 获得 IdempotentKeyResolver |
| | | IdempotentKeyResolver keyResolver = keyResolvers.get(idempotent.keyResolver()); |
| | | Assert.notNull(keyResolver, "找不到对应的 IdempotentKeyResolver"); |
| | | // 解析 Key |
| | | String key = keyResolver.resolver(joinPoint, idempotent); |
| | | |
| | | // 1. 锁定 Key |
| | | boolean success = idempotentRedisDAO.setIfAbsent(key, idempotent.timeout(), idempotent.timeUnit()); |
| | | // 锁定失败,抛出异常 |
| | | if (!success) { |
| | | log.info("[aroundPointCut][方法({}) 参数({}) 存在重复请求]", joinPoint.getSignature().toString(), joinPoint.getArgs()); |
| | | throw new ServiceException(GlobalErrorCodeConstants.REPEATED_REQUESTS.getCode(), idempotent.message()); |
| | | } |
| | | |
| | | // 2. 执行逻辑 |
| | | try { |
| | | return joinPoint.proceed(); |
| | | } catch (Throwable throwable) { |
| | | // 3. 异常时,删除 Key |
| | | // 参考美团 GTIS 思路:https://tech.meituan.com/2016/09/29/distributed-system-mutually-exclusive-idempotence-cerberus-gtis.html |
| | | if (idempotent.deleteKeyWhenException()) { |
| | | idempotentRedisDAO.delete(key); |
| | | } |
| | | throw throwable; |
| | | } |
| | | } |
| | | |
| | | } |