/*
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

package org.apache.jk.common;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

import org.apache.jk.core.Msg;
import org.apache.jk.core.MsgContext;
import org.apache.tomcat.util.IntrospectionUtils;

/** Shm implementation using JDK1.4 nio.
 *
 *
 * @author Costin Manolache
 */
public class Shm14 extends Shm {
    // Not ready yet.

    MappedByteBuffer bb;

    public void init() {
        try {
            RandomAccessFile f=new RandomAccessFile( file, "rw" );
            FileChannel fc=f.getChannel();
            
            bb=fc.map( FileChannel.MapMode.READ_WRITE, 0, f.length());
        } catch( IOException ex ) {
            ex.printStackTrace();
        }
    }

    public void dumpScoreboard(String file) {
        // We can only sync with our backing store.
        bb.force();
        // XXX we should copy the content to the file
    }

    public void resetScoreboard() throws IOException {
        // XXX Need to write the head
    }


    public  int invoke(Msg msg, MsgContext ep )
        throws IOException
    {
        System.err.println("ChannelShm14.invoke: "  + ep );

        // 
        
        return 0;
    }    

    public void initCli() {
    }

    public static void main( String args[] ) {
        try {
            Shm14 shm=new Shm14();

            if( args.length == 0 ||
                ( "-?".equals(args[0]) ) ) {
                shm.setHelp( true );
                return;
            }

            IntrospectionUtils.processArgs( shm, args);
            shm.execute();
        } catch( Exception ex ) {
            ex.printStackTrace();
        }
    }

}
