/*
* Adito
*
* Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package com.adito.replacementproxy;
import java.io.File;
import java.io.Serializable;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionBindingListener;
import org.apache.commons.cache.SimpleCache;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.adito.properties.Property;
import com.adito.properties.impl.systemconfig.SystemConfigKey;
import com.adito.security.User;
/**
*/
public class ContentCache extends SimpleCache implements HttpSessionBindingListener {
private static final long serialVersionUID = 2384792384792374982L;
private static final Log LOG = LogFactory.getLog(ContentCache.class);
private ContentStash contentStash;
private User user;
public ContentCache(User user, File cacheDir, int maxMB, int maxObjects) {
this(user, new ContentStash(1024 * 1024 * maxMB, maxObjects, cacheDir, 20, true));
if (LOG.isInfoEnabled()) {
LOG.info("Created new cache at " + cacheDir.getAbsolutePath() + " for " + user.getPrincipalName() + " of capacity "
+ contentStash.capacity() + ".");
}
}
private ContentCache(User user, ContentStash stash) {
super(stash);
contentStash = (ContentStash) stash;
this.user = user;
}
@Override
public synchronized boolean contains(Serializable key) {
// commons cache doesn't evict expired entries until the item is
// retrieved, hence force a retrieve so we get the correct answer
retrieve(key);
return super.contains(key);
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpSessionBindingListener#valueBound(javax.servlet.http.HttpSessionBindingEvent)
*/
public void valueBound(HttpSessionBindingEvent arg0) {
}
/*
* (non-Javadoc)
*
* @see javax.servlet.http.HttpSessionBindingListener#valueUnbound(javax.servlet.http.HttpSessionBindingEvent)
*/
public void valueUnbound(HttpSessionBindingEvent arg0) {
if (Property.getPropertyBoolean(new SystemConfigKey("webForwards.cache.clearOnLogout"))) {
return;
}
if (LOG.isInfoEnabled()) {
LOG.info("Clearing content cache for " + user.getPrincipalName());
}
contentStash.clear();
if (LOG.isInfoEnabled()) {
LOG.info("Cleared content cache for " + user.getPrincipalName());
}
}
}