001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.commons.collection.concurrent; 020 021import lucee.commons.collection.concurrent.ConcurrentLinkedHashMapPro.Entry; 022 023public class ExpirationPolicy implements EvictionPolicy { 024 025 long ageThresholdMillis; 026 long idleTimeThresholdMillis; 027 028 public ExpirationPolicy(long ageThresholdMillis, long idleTimeThresholdMillis) { 029 this.ageThresholdMillis = ageThresholdMillis; 030 this.idleTimeThresholdMillis = idleTimeThresholdMillis; 031 } 032 033 @Override 034 public boolean accessOrder() { 035 return true; 036 } 037 038 @Override 039 public boolean insertionOrder() { 040 return false; 041 } 042 043 @Override 044 public Entry<?, ?> evictElement(Entry<?, ?> head) { 045 return head.getAfter(); 046 } 047 048 @Override 049 public Entry<?, ?> recordInsertion(Entry<?, ?> head, Entry<?, ?> insertedEntry) { 050 return null; 051 } 052 053 @Override 054 public Entry<?, ?> recordAccess(Entry<?, ?> head, Entry<?, ?> accessedEntry) { 055 long now = System.currentTimeMillis(); 056 long accessedEntryAge = (now - accessedEntry.getCreationTime()); 057 long accessedEntryIdleTime = (now - accessedEntry.getLastAccessTime()); 058 if(accessedEntryIdleTime < idleTimeThresholdMillis && accessedEntryAge < ageThresholdMillis) 059 return head; 060 return accessedEntry.getAfter(); 061 } 062 063}