结合ehcache缓存对lucene使用单例模式搜索

我采用和ehcache缓存结合使用单例模式 ,其实就是给indexsearcher加了个缓存
使用ehcache在内存中设置一个缓存，时间为10分钟。
当IndexSearcher对象不存在时，创建静态对象同时在缓存中写入一个值，表示对象已经存在了.
搜索时如果缓存过期，则重新创建IndexSearcher

public class MySearcher {private IndexSearcher searcher = null;private static MySearcher mySearcher = null;public static MySearcher getInstance() throws IOException{CacheManager manager = CacheManager.getInstance(); net.sf.ehcache.Cache cache = manager.getCache("seacher_cache");String seacherKey = "Searcher_Id";net.sf.ehcache.Element searchElement = cache.get(seacherKey);         if (mySearcher==null || searchElement==null){          mySearcher = new MySearcher();        searchElement = new net.sf.ehcache.Element(seacherKey,1);     cache.put(searchElement);            }        return mySearcher;    }    public MySearcher() throws IOException{this.searcher = new IndexSearcher("d:/index");    }}

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