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优化RateLimiter注解使用体验

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数据小王子 2024-03-06 10:14:00 +08:00
parent 7c649bb5b2
commit b8ab413eab
2 changed files with 37 additions and 46 deletions
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76
ruoyi-common/ruoyi-common-ratelimiter/src/main/java/com/ruoyi/common/ratelimiter/aspectj/RateLimiterAspect.java
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@ -1,29 +1,29 @@
package com.ruoyi.common.ratelimiter.aspectj;
import cn.hutool.core.util.ArrayUtil;
import com.ruoyi.common.core.constant.GlobalConstants;
import com.ruoyi.common.core.exception.ServiceException;
import com.ruoyi.common.core.utils.MessageUtils;
import com.ruoyi.common.core.utils.ServletUtils;
import com.ruoyi.common.core.utils.StringUtils;
import com.ruoyi.common.ratelimiter.annotation.RateLimiter;
import com.ruoyi.common.ratelimiter.enums.LimitType;
import com.ruoyi.common.redis.utils.RedisUtils;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import com.ruoyi.common.core.constant.GlobalConstants;
import com.ruoyi.common.core.exception.ServiceException;
import com.ruoyi.common.core.utils.MessageUtils;
import com.ruoyi.common.core.utils.ServletUtils;
import com.ruoyi.common.core.utils.SpringUtils;
import com.ruoyi.common.core.utils.StringUtils;
import com.ruoyi.common.ratelimiter.annotation.RateLimiter;
import com.ruoyi.common.ratelimiter.enums.LimitType;
import com.ruoyi.common.redis.utils.RedisUtils;
import org.redisson.api.RateType;
import org.springframework.context.expression.BeanFactoryResolver;
import org.springframework.context.expression.MethodBasedEvaluationContext;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.expression.ExpressionParser;
import org.springframework.expression.ParserContext;
import org.springframework.expression.common.TemplateParserContext;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
import java.lang.reflect.Method;
@ -44,21 +44,18 @@ public class RateLimiterAspect {
* 定义spel解析模版
*/
private final ParserContext parserContext = new TemplateParserContext();
/**
* 定义spel上下文对象进行解析
*/
private final EvaluationContext context = new StandardEvaluationContext();
/**
* 方法参数解析器
*/
private final ParameterNameDiscoverer pnd = new DefaultParameterNameDiscoverer();
@Before("@annotation(rateLimiter)")
public void doBefore(JoinPoint point, RateLimiter rateLimiter) throws Throwable {
public void doBefore(JoinPoint point, RateLimiter rateLimiter) {
int time = rateLimiter.time();
int count = rateLimiter.count();
String combineKey = getCombineKey(rateLimiter, point);
try {
String combineKey = getCombineKey(rateLimiter, point);
RateType rateType = RateType.OVERALL;
if (rateLimiter.limitType() == LimitType.CLUSTER) {
rateType = RateType.PER_CLIENT;
@ -76,42 +73,29 @@ public class RateLimiterAspect {
if (e instanceof ServiceException) {
throw e;
} else {
throw new RuntimeException("服务器限流异常，请稍候再试");
throw new RuntimeException("服务器限流异常，请稍候再试", e);
}
}
}
public String getCombineKey(RateLimiter rateLimiter, JoinPoint point) {
private String getCombineKey(RateLimiter rateLimiter, JoinPoint point) {
String key = rateLimiter.key();
// 获取方法(通过方法签名来获取)
MethodSignature signature = (MethodSignature) point.getSignature();
Method method = signature.getMethod();
Class<?> targetClass = method.getDeclaringClass();
// 判断是否是spel格式
if (StringUtils.containsAny(key, "#")) {
// 获取参数值
if (StringUtils.isNotBlank(key)) {
MethodSignature signature = (MethodSignature) point.getSignature();
Method targetMethod = signature.getMethod();
Object[] args = point.getArgs();
// 获取方法上参数的名称
String[] parameterNames = pnd.getParameterNames(method);
if (ArrayUtil.isEmpty(parameterNames)) {
throw new ServiceException("限流key解析异常!请联系管理员!");
}
for (int i = 0; i < parameterNames.length; i++) {
context.setVariable(parameterNames[i], args[i]);
}
// 解析返回给key
try {
Expression expression;
if (StringUtils.startsWith(key, parserContext.getExpressionPrefix())
&& StringUtils.endsWith(key, parserContext.getExpressionSuffix())) {
expression = parser.parseExpression(key, parserContext);
} else {
expression = parser.parseExpression(key);
}
key = expression.getValue(context, String.class) + ":";
} catch (Exception e) {
throw new ServiceException("限流key解析异常!请联系管理员!");
//noinspection DataFlowIssue
MethodBasedEvaluationContext context =
new MethodBasedEvaluationContext(null, targetMethod, args, pnd);
context.setBeanResolver(new BeanFactoryResolver(SpringUtils.getBeanFactory()));
Expression expression;
if (StringUtils.startsWith(key, parserContext.getExpressionPrefix())
&& StringUtils.endsWith(key, parserContext.getExpressionSuffix())) {
expression = parser.parseExpression(key, parserContext);
} else {
expression = parser.parseExpression(key);
}
key = expression.getValue(context, String.class);
}
StringBuilder stringBuffer = new StringBuilder(GlobalConstants.RATE_LIMIT_KEY);
stringBuffer.append(ServletUtils.getRequest().getRequestURI()).append(":");

7
ruoyi-common/ruoyi-common-ratelimiter/src/main/resources/spel-extension.json Normal file
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@ -0,0 +1,7 @@
{
"com.ruoyi.common.ratelimiter.annotation.RateLimiter@key": {
"method": {
"parameters": true
}
}
}