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.runtime.tag;
020
021import java.io.IOException;
022
023import lucee.runtime.PageContextImpl;
024import lucee.runtime.exp.PageException;
025import lucee.runtime.ext.tag.TagImpl;
026import lucee.runtime.op.Caster;
027
028/**
029* Flushes currently available data to the client.
030*
031*
032*
033**/
034public final class Flush extends TagImpl {
035
036        /** Flush the output each time at least the specified number of bytes become available. HTML 
037        **              headers, and any data that is already available when you make this call, are not included in 
038        **              the count. */
039        private double interval=-1;
040
041        @Override
042        public void release()   {
043                super.release();
044                interval=-1;
045        }
046
047        /** set the value interval
048        *  Flush the output each time at least the specified number of bytes become available. HTML 
049        *               headers, and any data that is already available when you make this call, are not included in 
050        *               the count.
051        * @param interval value to set
052        **/
053        public void setInterval(double interval)        {
054                this.interval=interval;
055        }
056
057
058        @Override
059        public int doStartTag() throws PageException    {
060        try {
061                        if(interval==-1)((PageContextImpl)pageContext).getRootOut().flush();
062                        else ((PageContextImpl)pageContext).getRootOut().setBufferConfig((int)interval,true);
063                } catch (IOException e) {
064                        throw Caster.toPageException(e);
065                }
066                return SKIP_BODY;
067        }
068
069        @Override
070        public int doEndTag()   {
071                return EVAL_PAGE;
072        }
073}