| 提交 | 用户 | 时间 | ||
| e57a89 | 1 | package com.jcdm.framework.aspectj; |
| 懒 | 2 | |
| 3 | import java.lang.reflect.Method; | |
| 4 | import java.util.Collections; | |
| 5 | import java.util.List; | |
| 6 | import org.aspectj.lang.JoinPoint; | |
| 7 | import org.aspectj.lang.annotation.Aspect; | |
| 8 | import org.aspectj.lang.annotation.Before; | |
| 9 | import org.aspectj.lang.reflect.MethodSignature; | |
| 10 | import org.slf4j.Logger; | |
| 11 | import org.slf4j.LoggerFactory; | |
| 12 | import org.springframework.beans.factory.annotation.Autowired; | |
| 13 | import org.springframework.data.redis.core.RedisTemplate; | |
| 14 | import org.springframework.data.redis.core.script.RedisScript; | |
| 15 | import org.springframework.stereotype.Component; | |
| 16 | import com.jcdm.common.annotation.RateLimiter; | |
| 17 | import com.jcdm.common.enums.LimitType; | |
| 18 | import com.jcdm.common.exception.ServiceException; | |
| 19 | import com.jcdm.common.utils.StringUtils; | |
| 20 | import com.jcdm.common.utils.ip.IpUtils; | |
| 21 | ||
| 22 | /** | |
| 23 | * 限流处理 | |
| 24 | * | |
| 25 | * @author jc | |
| 26 | */ | |
| 27 | //@Aspect | |
| 28 | //@Component | |
| 29 | public class RateLimiterAspect | |
| 30 | { | |
| 31 | private static final Logger log = LoggerFactory.getLogger(RateLimiterAspect.class); | |
| 32 | ||
| 33 | private RedisTemplate<Object, Object> redisTemplate; | |
| 34 | ||
| 35 | private RedisScript<Long> limitScript; | |
| 36 | ||
| 37 | // @Autowired | |
| 38 | public void setRedisTemplate1(RedisTemplate<Object, Object> redisTemplate) | |
| 39 | { | |
| 40 | this.redisTemplate = redisTemplate; | |
| 41 | } | |
| 42 | ||
| 43 | // @Autowired | |
| 44 | public void setLimitScript(RedisScript<Long> limitScript) | |
| 45 | { | |
| 46 | this.limitScript = limitScript; | |
| 47 | } | |
| 48 | ||
| 49 | @Before("@annotation(rateLimiter)") | |
| 50 | public void doBefore(JoinPoint point, RateLimiter rateLimiter) throws Throwable | |
| 51 | { | |
| 52 | int time = rateLimiter.time(); | |
| 53 | int count = rateLimiter.count(); | |
| 54 | ||
| 55 | String combineKey = getCombineKey(rateLimiter, point); | |
| 56 | List<Object> keys = Collections.singletonList(combineKey); | |
| 57 | try | |
| 58 | { | |
| 59 | Long number = redisTemplate.execute(limitScript, keys, count, time); | |
| 60 | if (StringUtils.isNull(number) || number.intValue() > count) | |
| 61 | { | |
| 62 | throw new ServiceException("访问过于频繁，请稍候再试"); | |
| 63 | } | |
| 64 | log.info("限制请求'{}',当前请求'{}',缓存key'{}'", count, number.intValue(), combineKey); | |
| 65 | } | |
| 66 | catch (ServiceException e) | |
| 67 | { | |
| 68 | throw e; | |
| 69 | } | |
| 70 | catch (Exception e) | |
| 71 | { | |
| 72 | throw new RuntimeException("服务器限流异常，请稍候再试"); | |
| 73 | } | |
| 74 | } | |
| 75 | ||
| 76 | public String getCombineKey(RateLimiter rateLimiter, JoinPoint point) | |
| 77 | { | |
| 78 | StringBuffer stringBuffer = new StringBuffer(rateLimiter.key()); | |
| 79 | if (rateLimiter.limitType() == LimitType.IP) | |
| 80 | { | |
| 81 | stringBuffer.append(IpUtils.getIpAddr()).append("-"); | |
| 82 | } | |
| 83 | MethodSignature signature = (MethodSignature) point.getSignature(); | |
| 84 | Method method = signature.getMethod(); | |
| 85 | Class<?> targetClass = method.getDeclaringClass(); | |
| 86 | stringBuffer.append(targetClass.getName()).append("-").append(method.getName()); | |
| 87 | return stringBuffer.toString(); | |
| 88 | } | |
| 89 | } | |
