/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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; version 2 of the License.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Nov 19, 2008
*/
package com.bigdata.service;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.log4j.Logger;
/**
* A (transient) property set associated with some kinds of services.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class Session {
protected static final Logger log = Logger.getLogger(Session.class);
private ConcurrentHashMap<String, Object> session = new ConcurrentHashMap<String, Object>();
public Object get(String name) {
return session.get(name);
}
public Object putIfAbsent(String name, Object value) {
final Object ret = session.putIfAbsent(name, value);
if (log.isInfoEnabled())
log.info("name=" + name + ", size=" + session.size());
return ret;
}
public Object put(String name, Object value) {
final Object ret = session.put(name, value);
if (log.isInfoEnabled())
log.info("name=" + name + ", size=" + session.size());
return ret;
}
public Object remove(String name) {
final Object ret = session.remove(name);
if (log.isInfoEnabled())
log.info("name=" + name + ", size=" + session.size() + ", removed="
+ (ret != null));
return ret;
}
public Object remove(String name, Object expectedValue) {
final Object ret = session.remove(name, expectedValue);
if (log.isInfoEnabled())
log.info("name=" + name + ", size=" + session.size() + ", removed="
+ (ret != null));
return ret;
}
}