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();
}
}
}
本文转自yjflinchong 51CTO博客，原文链接：http://blog.51cto.com/yjflinchong/1164956，如需转载请自行联系原作者
