Lucene用到的oscache，记录下来

Lucene用到的oscache，记录下来

操作缓存类

package com.jq.util;


import java.util.Date;


import com.opensymphony.oscache.base.CacheEntry;
import com.opensymphony.oscache.base.EntryRefreshPolicy;
import com.opensymphony.oscache.base.NeedsRefreshException;
import com.opensymphony.oscache.general.GeneralCacheAdministrator;


/**
 * @author
 */
public class BaseCache extends GeneralCacheAdministrator {
// 过期时间(单位为秒);
private int refreshPeriod;


// 关键字前缀字符;
private String keyPrefix;


private static final long serialVersionUID = -5437192926052145345L;


public BaseCache(String keyPrefix, int refreshPeriod) {
super();
this.keyPrefix = keyPrefix;
this.refreshPeriod = refreshPeriod;
}


/**
* 添加被缓存的对象;
*/
public void put(String key, Object value) {
this.putInCache(this.keyPrefix + "_" + key, value);
}


/**
* 删除被缓存的对象;
*/
public void remove(String key) {
this.flushEntry(this.keyPrefix + "_" + key);
}


/**
* 删除所有被缓存的对象;
*/
public void removeAll(Date date) {
this.flushAll(date);
}


public void removeAll() {
this.flushAll();
}


/**
* 获取被缓存的对象;
*/
public Object get(String key) throws Exception {
try {
return this.getFromCache(this.keyPrefix + "_" + key,
this.refreshPeriod);
} catch (NeedsRefreshException e) {
this.cancelUpdate(this.keyPrefix + "_" + key);
return null;
}
}


/**
* 
* @param key
* @param refreshPeriod
* @return 被缓存的对象
* @throws Exception
*/
public Object get(String key, int refreshPeriod) throws Exception {
try {
return this.getFromCache(this.keyPrefix + "_" + key, refreshPeriod);
} catch (NeedsRefreshException e) {
this.cancelUpdate(this.keyPrefix + "_" + key);
return null;
}
}
}

lucene 操作oscache

package com.jq.util;


public class LuceneCache {


private static BaseCache luceneCache = null;
private static String keyPrefix = "lucenecache";
public static int times = 5;//单位秒

public static BaseCache getInstance() {
if (luceneCache == null) {
luceneCache = new BaseCache(keyPrefix, times);
}
return luceneCache;
}

public static void main(String[] args) {
luceneCache = getInstance();
luceneCache.put("nihao", "你好");
try {
System.out.println(luceneCache.get("nihao"));
Thread.sleep(4000);
System.out.println(luceneCache.get("nihao"));

System.out.println(luceneCache.get("1"));
} catch (Exception e) {
e.printStackTrace();
}
}




}