java 緩衝讀寫

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package com.castalia.market.blh.impl;import java.io.Serializable;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.apache.log4j.Logger;import org.springframework.stereotype.Component;import net.sf.ehcache.Cache;import net.sf.ehcache.CacheManager;import net.sf.ehcache.Element;import com.castalia.market.blh.IgetCampaignPrizeFromCacheBlh;import com.castalia.market.vo.CampaignPrizeRange;@Componentpublic class getCampaignPrizeFromCacheBlhImpl implements        IgetCampaignPrizeFromCacheBlh {    private static final Logger logger = Logger.getLogger(getCampaignPrizeFromCacheBlhImpl.class);    private  Cache cache;    public getCampaignPrizeFromCacheBlhImpl()    {            URL url = CampaignPrizeCacheBlhImpl.class.getClassLoader().getResource("/config/ehcache.xml");            CacheManager manager = new CacheManager(url);            logger.info(manager.getName());            cache = manager.getCache("sampleCache2");    }    @Override     public synchronized String getCampaignPrizeFromCache(String key, int num) {                // TODO Auto-generated method stub          StringBuilder Hashcodes=new StringBuilder();          logger.info("取緩衝的鍵:"+key);           try{                   Element result = cache.get(key);                   if(result==null)                   {                       logger.info("取緩衝的索引值: CacheNull");                       return "CacheNull";                   }                   @SuppressWarnings("deprecation")                   List<CampaignPrizeRange> CampaignPrizeRanges=(List<CampaignPrizeRange>)result.getValue();                   String ServerIndex=key.substring(0,2);                   int index=0;                      List<CampaignPrizeRange> RemoveCampaignPrizeRanges=new ArrayList<CampaignPrizeRange>();                   tag:                   for(CampaignPrizeRange e :CampaignPrizeRanges)                   {                       for (long i=e.getStartValue();i<=e.getEndValue();i++)                       {                                                    if(index>=num)                           {                               e.setStartValue(i);                               break tag;                           }                           else                           {                               Hashcodes.append(ServerIndex+String.format("%06d", i)+",");                               index++;                           }                       }                       RemoveCampaignPrizeRanges.add(e);                                          }                   if(index!=num)                   {                       logger.info("取緩衝的索引值: Lack");                     return "Lack";                   }                   else                   {                       for(CampaignPrizeRange e :RemoveCampaignPrizeRanges)                       {                           CampaignPrizeRanges.remove(e);                       }                       if(Hashcodes.length()>0)                       {                           saveToCache(key,CampaignPrizeRanges);                       }                       else                       {                           logger.info("取緩衝的索引值: ");                           return "";                       }                                          }               }               catch(Exception e)               {                   return "Error";               }           String keyValue=Hashcodes.substring(0,Hashcodes.length()-1);           logger.info("取緩衝的索引值:"+keyValue);        return keyValue;    }    @Override    public synchronized void saveToCache(String key,Object Value )    {         logger.info("進入鎖儲存資料鍵:"+key);           try{               // 添加資料到緩衝中               Element element = new Element(key, (Serializable)Value);               cache.put(element);               logger.info("儲存成功");              }               catch(Exception e)               {                   logger.info(e.getMessage());               }    }        @Override    public String get(String key){                 Element result = cache.get(key);         if(result==null)         {             return "CacheNull";         }         @SuppressWarnings("deprecation")         String ret= (String) result.getValue();         return ret;    }}

 

java 緩衝讀寫