Question

我正在尝试在Ehcache中缓存一个简单的网页。感谢另一篇SO帖子的帮助，我发现我需要基于Ehcache 2代码实现自己的过滤器。当我看到filter时，我不理解它。它在哪里调用缓存返回值？这是我的实现（很可能是错误的）：

package com.sentiment360.pulse.cache;

import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.Element;
import org.ehcache.Cache;
import org.ehcache.CacheManager;
import org.ehcache.config.Configuration;
import static org.ehcache.config.builders.CacheManagerBuilder.newCacheManager;
import org.ehcache.core.Ehcache;
import org.ehcache.event.CacheEvent;
import org.ehcache.event.CacheEventListener;
import org.ehcache.xml.XmlConfiguration;

import javax.servlet.http.HttpServletRequest;

public class SimplePageCachingFilter implements CachingFilter {
     public static final String DEFAULT_CACHE_NAME = "SimplePageCachingFilter";
     private Logger LOG = Logger.getLogger(this.getClass().getName());
     private String cacheName="basicCache";

    protected String getCacheName() {
         if (cacheName != null && cacheName.length() > 0) {
              LOG.log(Level.INFO,"Using configured cacheName of {}.", cacheName);
              return cacheName;
          } else {
               LOG.log(Level.INFO,"No cacheName configured. Using default of {}.", DEFAULT_CACHE_NAME);
               return DEFAULT_CACHE_NAME;
           }
    }

    protected CacheManager getCacheManager() {
      return CacheManager.getInstance();
    }

    protected String calculateKey(HttpServletRequest httpRequest) {
      StringBuffer stringBuffer = new StringBuffer();
      stringBuffer.append(httpRequest.getMethod()).append(httpRequest.getRequestURI()).append(httpRequest.getQueryString());
      String key = stringBuffer.toString();
      return key;
    }
}

Answer 1

见super class。但你做implements CachingFilter？！那个界面在哪里？看起来你试图“复制”以前的Ehcache SimplePageCachingFilter，对吗？你还需要移植那个抽象的超类（并且可能会读一些关于javax.servlet.Filter的内容，以防这些不完全清楚...）

现在，您可能还希望在Ehcache Dev Google group上对开发团队进行ping操作。他们应该能够提供指针，然后帮助实现。对于未来的拉动请求看起来是个好主意！：）

Ehcache 3简单网页缓存的过滤器在哪里调用缓存？

1 个答案: