/** * * Copyright 2014 The Darks ORM Project (Liu lihua) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package darks.orm.core.cache.thread; import java.lang.ref.SoftReference; import java.lang.ref.WeakReference; import java.util.Map; import java.util.Map.Entry; import java.util.Queue; import java.util.concurrent.ConcurrentMap; import darks.orm.core.cache.CacheKey; import darks.orm.core.cache.CacheList; import darks.orm.core.cache.CacheObject; import darks.orm.core.data.xml.CacheConfigData; import darks.orm.core.session.SessionContext; import darks.orm.log.Logger; import darks.orm.log.LoggerFactory; @SuppressWarnings("unchecked") public class CacheCheckThread implements Runnable { private static final Logger logger = LoggerFactory.getLogger(CacheCheckThread.class); private Queue<CacheKey> keysList; private ConcurrentMap<CacheKey, Object> entityMap; private ConcurrentMap<CacheKey, CacheList> listMap; private CacheConfigData appConfigData; public CacheCheckThread() { } public CacheCheckThread(Queue<CacheKey> keysList, ConcurrentMap<CacheKey, Object> entityMap, ConcurrentMap<CacheKey, CacheList> listMap, CacheConfigData appConfigData) { this.keysList = keysList; this.entityMap = entityMap; this.listMap = listMap; this.appConfigData = appConfigData; } @Override public void run() { try { logger.debug("The cache object check thread has been started."); while (SessionContext.isInited()) { int num = 0; for (Entry<CacheKey, Object> entry : entityMap.entrySet()) { CacheKey key = entry.getKey(); Object obj = entry.getValue(); if (obj == null) { removeKey(key); continue; } Object value = obj; if (obj instanceof WeakReference) { value = ((WeakReference<Object>)obj).get(); } else if (obj instanceof SoftReference) { value = ((SoftReference<Object>)obj).get(); } if (value == null) { removeKey(key); continue; } CacheObject cacheObject = (CacheObject)value; long curTime = System.currentTimeMillis(); if (appConfigData.getIdleTime() > 0) { long tmp = curTime - cacheObject.getLastIdleTime(); if (tmp > appConfigData.getIdleTime()) { removeKey(key); continue; } } if (appConfigData.getLiveTime() > 0) { long tmp = curTime - cacheObject.getLastLiveTime(); if (tmp > appConfigData.getLiveTime()) { removeKey(key); continue; } } num++; if (num > 512) { num = 0; Thread.sleep(500); } } Thread.sleep(1000); } } catch (Exception e) { e.printStackTrace(); } } /** * �Ƴ�������� * * @param key */ private void removeKey(CacheKey key) { if (keysList.size() > 0) keysList.remove(key); if (entityMap.size() > 0) entityMap.remove(key); for (Entry<CacheKey, CacheList> entry : listMap.entrySet()) { CacheKey tmpkey = entry.getKey(); CacheList list = entry.getValue(); Map<CacheKey, Object> map = list.getMap(); if (map.containsKey(key)) { listMap.remove(tmpkey); } } } }