com.medigy.persist.model.session.SessionManager.java Source code

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Here is the source code for com.medigy.persist.model.session.SessionManager.java

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/*
 * Copyright (c) 2000-2003 Netspective Communications LLC. All rights reserved.
 *
 * Netspective Communications LLC ("Netspective") permits redistribution, modification and use of this file in source
 * and binary form ("The Software") under the Netspective Source License ("NSL" or "The License"). The following
 * conditions are provided as a summary of the NSL but the NSL remains the canonical license and must be accepted
 * before using The Software. Any use of The Software indicates agreement with the NSL.
 *
 * 1. Each copy or derived work of The Software must preserve the copyright notice and this notice unmodified.
 *
 * 2. Redistribution of The Software is allowed in object code form only (as Java .class files or a .jar file
 *    containing the .class files) and only as part of an application that uses The Software as part of its primary
 *    functionality. No distribution of the package is allowed as part of a software development kit, other library,
 *    or development tool without written consent of Netspective. Any modified form of The Software is bound by these
 *    same restrictions.
 *
 * 3. Redistributions of The Software in any form must include an unmodified copy of The License, normally in a plain
 *    ASCII text file unless otherwise agreed to, in writing, by Netspective.
 *
 * 4. The names "Netspective", "Axiom", "Commons", "Junxion", and "Sparx" are trademarks of Netspective and may not be
 *    used to endorse products derived from The Software without without written consent of Netspective. "Netspective",
 *    "Axiom", "Commons", "Junxion", and "Sparx" may not appear in the names of products derived from The Software
 *    without written consent of Netspective.
 *
 * 5. Please attribute functionality where possible. We suggest using the "powered by Netspective" button or creating
 *    a "powered by Netspective(tm)" link to http://www.netspective.com for each application using The Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT,
 * ARE HEREBY DISCLAIMED.
 *
 * NETSPECTIVE AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE OR ANY THIRD PARTY AS A
 * RESULT OF USING OR DISTRIBUTING THE SOFTWARE. IN NO EVENT WILL NETSPECTIVE OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THE SOFTWARE, EVEN
 * IF HE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * @author Shahid N. Shah
 */

/*
 * Copyright (c) 2005 Your Corporation. All Rights Reserved.
 */
package com.medigy.persist.model.session;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.Stack;

public class SessionManager {
    private static final Log log = LogFactory.getLog(SessionManager.class);

    private static final SessionManager INSTANCE = new SessionManager();

    public static final SessionManager getInstance() {
        return INSTANCE;
    }

    private final ThreadLocal<Stack<Session>> threadSession = new ThreadLocal<Stack<Session>>();

    public SessionManager() {
        threadSession.set(new Stack<Session>());
    }

    /**
     * Gets (peeks) the session from the stack
     * @return
     */
    public Session getActiveSession() {
        try {
            // TODO: threadSession.get() is currently NULL. Need to figure out where to start tracking sessions in the web application
            if (threadSession.get().isEmpty())
                return null;
            return threadSession.get().peek();
        } catch (Exception e) {
            log.error(e);
            return null;
        }
    }

    /**
     * Pushes the new session onto the stack
     * @param session
     */
    public void pushActiveSession(final Session session) {
        try {
            threadSession.get().push(session);
        } catch (Exception e) {
            log.error(e);
        }
    }

    /**
     * Pops the active session from the stack
     */
    public void popActiveSession() {
        try {
            threadSession.get().pop();
        } catch (Exception e) {
            log.error(e);
        }
    }
}