Question

我正在使用拦截器来验证用户，我希望使用Redis可以缓存。下面是代码。缓存在拦截器内部不起作用。 @Cacheable在我的控制器中工作我测试了

    import com.fasterxml.jackson.databind.ObjectMapper;
    import org.apache.commons.collections4.CollectionUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.cache.annotation.CachePut;
    import org.springframework.cache.annotation.Cacheable;
    import org.springframework.cache.annotation.EnableCaching;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Profile;
    import org.springframework.http.HttpEntity;
    import org.springframework.http.HttpHeaders;
    import org.springframework.http.MediaType;
    import org.springframework.http.ResponseEntity;
    import org.springframework.stereotype.Component;
    import org.springframework.util.LinkedMultiValueMap;
    import org.springframework.util.MultiValueMap;
    import org.springframework.web.client.RestTemplate;
    import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
    import uk.co.rullion.ledger.exception.UnauthorisedAccessException;

    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.util.*;


    @Component
    @Profile({"dev","prod"})
    public class AuthenticationInterceptor extends HandlerInterceptorAdapter {


        @Override
        public boolean preHandle(HttpServletRequest request,
                                 HttpServletResponse response, Object object) throws UnauthorisedAccessException {

            Map<String,List> userRoles = authenticateUser(username, password);
            ....

            return authorizationResult;
        }

        @Cacheable(value="authenticateUser")
        public Map<String,List> authenticateUser(String username, String password) {
            //authenticating user logic
// there service layer call is happening everytime
            return userRoles;
        }  

    }

Answer 1

只有通过代理进入的外部方法调用才有截获。这意味着自我调用实际上是一种方法在目标对象内调用目标对象的另一个方法，即使在运行时也不会导致实际的缓存拦截调用的方法用@Cacheable标记。

将authenticateUser方法调用解压缩到一个单独的服务中，并将该类声明为@Service / @Component，并使用@cacheable注释缓存单个方法

缓存在弹簧拦截器中不起作用

1 个答案: