001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.commons.io.retirement;
020
021import java.util.ArrayList;
022import java.util.List;
023
024import lucee.commons.io.SystemUtil;
025import lucee.commons.lang.ExceptionUtil;
026
027public class RetireOutputStreamFactory {
028        
029        static List<RetireOutputStream> list=new ArrayList<RetireOutputStream>();
030        private static RetireThread thread;
031        
032        static void startThread(long timeout) {
033                if(timeout<1000) timeout=1000;
034                if(thread==null || !thread.isAlive()) {
035                        thread=new RetireThread(timeout);
036                        thread.start();
037                }
038                else if(thread.sleepTime>timeout) {
039                        thread.sleepTime=timeout;
040                        SystemUtil.notify(thread);
041                }
042        }
043
044        static class RetireThread extends Thread {
045                
046                public long sleepTime;
047                
048                public RetireThread(long sleepTime){
049                        this.sleepTime=sleepTime;
050                }
051                
052                
053                public void run(){
054                        //print.e("start thread");
055                        while(true){
056                                try{
057                                        if(list.size()==0) break;
058                                        SystemUtil.wait(this,sleepTime);
059                                        //SystemUtil.sleep(sleepTime);
060                                        RetireOutputStream[] arr = list.toArray(new RetireOutputStream[list.size()]); // not using iterator to avoid ConcurrentModificationException
061                                        for(int i=0;i<arr.length;i++){
062                                                arr[i].retire();
063                                        }
064                                        
065                                }
066                                catch(Throwable t){
067                        ExceptionUtil.rethrowIfNecessary(t);
068                        t.printStackTrace();
069                    }
070                        }
071                        //print.e("stop thread");
072                        thread=null;
073                }
074        }
075}