Houpn
3 years ago
6 changed files with 110 additions and 17 deletions
@ -0,0 +1,13 @@ |
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package cc.hiver.core.common.annotation; |
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import java.lang.annotation.*; |
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/** |
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*延时双删 |
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**/ |
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@Retention(RetentionPolicy.RUNTIME) |
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@Documented |
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@Target(ElementType.METHOD) |
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public @interface ClearAndReloadCache { |
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String name() default ""; |
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} |
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@ -0,0 +1,77 @@ |
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package cc.hiver.core.common.aop; |
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import cc.hiver.core.common.annotation.ClearAndReloadCache; |
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import org.aspectj.lang.ProceedingJoinPoint; |
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import org.aspectj.lang.Signature; |
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import org.aspectj.lang.annotation.Around; |
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import org.aspectj.lang.annotation.Aspect; |
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import org.aspectj.lang.annotation.Pointcut; |
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import org.aspectj.lang.reflect.MethodSignature; |
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import org.springframework.beans.factory.annotation.Autowired; |
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import org.springframework.data.redis.core.StringRedisTemplate; |
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import org.springframework.stereotype.Component; |
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import java.lang.reflect.Method; |
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import java.util.Set; |
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@Aspect |
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@Component |
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public class ClearAndReloadCacheAspect { |
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@Autowired |
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private StringRedisTemplate stringRedisTemplate; |
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/** |
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* 切入点 |
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*切入点,基于注解实现的切入点 加上该注解的都是Aop切面的切入点 |
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* |
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*/ |
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@Pointcut("@annotation(cc.hiver.core.common.annotation.ClearAndReloadCache)") |
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public void pointCut(){ |
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} |
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/** |
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* 环绕通知 |
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* 环绕通知非常强大，可以决定目标方法是否执行，什么时候执行，执行时是否需要替换方法参数，执行完毕是否需要替换返回值。 |
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* 环绕通知第一个参数必须是org.aspectj.lang.ProceedingJoinPoint类型 |
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* @param proceedingJoinPoint |
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*/ |
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@Around("pointCut()") |
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public Object aroundAdvice(ProceedingJoinPoint proceedingJoinPoint){ |
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System.out.println("----------- 环绕通知 -----------"); |
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System.out.println("环绕通知的目标方法名：" + proceedingJoinPoint.getSignature().getName()); |
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Signature signature1 = proceedingJoinPoint.getSignature(); |
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MethodSignature methodSignature = (MethodSignature)signature1; |
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Method targetMethod = methodSignature.getMethod();//方法对象
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ClearAndReloadCache annotation = targetMethod.getAnnotation(ClearAndReloadCache.class);//反射得到自定义注解的方法对象
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String name = annotation.name();//获取自定义注解的方法对象的参数即name
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Set<String> keys = stringRedisTemplate.keys("*" + name + "*");//模糊定义key
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stringRedisTemplate.delete(keys);//模糊删除redis的key值
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//执行加入双删注解的改动数据库的业务 即controller中的方法业务
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Object proceed = null; |
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try { |
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proceed = proceedingJoinPoint.proceed(); |
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} catch (Throwable throwable) { |
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throwable.printStackTrace(); |
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} |
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//开一个线程 延迟1秒（此处是1秒举例，可以改成自己的业务）
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// 在线程中延迟删除 同时将业务代码的结果返回 这样不影响业务代码的执行
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new Thread(() -> { |
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try { |
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Thread.sleep(1000); |
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Set<String> keys1 = stringRedisTemplate.keys("*" + name + "*");//模糊删除
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stringRedisTemplate.delete(keys1); |
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System.out.println("-----------1秒钟后，在线程中延迟删除完毕 -----------"); |
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} catch (InterruptedException e) { |
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e.printStackTrace(); |
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} |
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}).start(); |
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return proceed;//返回业务代码的值
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} |
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} |
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