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// --- BEGIN COPYRIGHT BLOCK ---
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.apps;


import java.util.Hashtable;
import java.util.Enumeration;
import java.util.TimeZone;
import  com.netscape.certsrv.apps.*;


/*---------------------------------------------------------------
 ** CommandQueue - Class
 */

/**
 *  register and unregister proccess for clean shutdown
 */
public class CommandQueue implements Runnable, ICommandQueue {

    public static Hashtable mCommandQueue = new Hashtable(); 
    public static boolean mShuttingDown = false;

    /*-----------------------------------------------------------
     ** CommandQueue - Constructor
     */
    
    /**
     * Main constructor.
     */
    public CommandQueue() {

    } // CommandQueue

    /*-----------------------------------------------------------
     ** run
     */
    
    /**
     * Overrides Thread.run(), calls batchPublish().
     */
    public void run() {
        //int  priority = Thread.MIN_PRIORITY;      
        //Thread.currentThread().setPriority(priority);
        /*-------------------------------------------------
         ** Loop until queue is empty
         */
        mShuttingDown = true;
        while (mCommandQueue.isEmpty() == false) {
            try {
                Thread.currentThread().sleep(5 * 1000);
                //gcProcess();
            } catch (Exception e) {

            }
        }
    } // run

    public boolean registerProcess(Object currentRequest, Object currentServlet) {
        if (mShuttingDown == false) {
            if ((currentServlet instanceof com.netscape.cms.servlet.base.CMSStartServlet) == false)
                mCommandQueue.put(currentRequest, currentServlet);
            return true;
        }else
            return false;
        
    }

    public void unRegisterProccess(Object currentRequest, Object currentServlet) {
        java.util.Enumeration e = mCommandQueue.keys();

        while (e.hasMoreElements()) {
            Object thisRequest = e.nextElement();
      
            if (thisRequest.equals(currentRequest)) {
                if (mCommandQueue.get(currentRequest).equals(currentServlet))
                    mCommandQueue.remove(currentRequest);
            }
        }
            
    }
} // CommandQueue