mirror of
https://github.com/Alfresco/alfresco-community-repo.git
synced 2025-06-16 17:55:15 +00:00
0c10d61a48
svn merge svn://svn.alfresco.com:3691/alfresco/BRANCHES/V2.0@5141 svn://svn.alfresco.com:3691/alfresco/BRANCHES/V2.0@51352 .
- FLOSS
- Some files will need a follow-up
-root/projects/repository/source/java/org/alfresco/repo/avm/wf/AVMRemoveWFStoreHandler.java (not yet on HEAD: 5094)
-root/projects/repository/source/java/org/alfresco/filesys/server/state/FileStateLockManager.java (not yet on HEAD: 5093)
-onContentUpdateRecord (not on HEAD)
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5167 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
96 lines
2.8 KiB
Java
96 lines
2.8 KiB
Java
/*
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* Copyright (C) 2005 Alfresco, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* As a special exception to the terms and conditions of version 2.0 of
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* the GPL, you may redistribute this Program in connection with Free/Libre
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* and Open Source Software ("FLOSS") applications as described in Alfresco's
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* FLOSS exception. You should have recieved a copy of the text describing
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* the FLOSS exception, and it is also available here:
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* http://www.alfresco.com/legal/licensing"
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*/
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package org.alfresco.repo.cache;
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/**
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* Simple cache of a single Object value.
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* <p>
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* The object placed in the cache will automatically be discarded after a timeout value.
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*
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* @author Kevin Roast
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*/
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public class ExpiringValueCache<T>
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{
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// default is to discard cached object after 1 minute
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private final static long TIMEOUT_DEFAULT = 1000L*60L;
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private long timeout = TIMEOUT_DEFAULT;
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private long snapshot = 0;
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private T value;
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/**
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* Default constructor.
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*
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* Uses the default timeout of 1 minute.
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*/
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public ExpiringValueCache()
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{
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}
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/**
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* Constructor
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*
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* @param timeout Timeout in milliseconds before cached value is discarded
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*/
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public ExpiringValueCache(long timeout)
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{
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this.timeout = timeout;
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}
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/**
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* Put a value into the cache. The item will be return from the associated get() method
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* until the timeout expires then null will be returned.
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*
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* @param value The object to store in the cache
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*/
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public void put(T value)
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{
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this.value = value;
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this.snapshot = System.currentTimeMillis();
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}
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/**
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* Get the cached object. The set item will be returned until it expires, then null will be returned.
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*
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* @return cached object or null if not set or expired.
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*/
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public T get()
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{
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if (snapshot + timeout < System.currentTimeMillis())
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{
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this.value = null;
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}
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return this.value;
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}
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/**
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* Clear the cache value
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*/
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public void clear()
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{
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this.value = null;
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}
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}
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