yacy_search_server/source/de/anomic/http/httpdByteCountOutputStream.java

//httpByteCountOutputStream.java 
//-----------------------
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2004
//
// This file is contributed by Martin Thelian
// last major change: $LastChangedDate$ by $LastChangedBy$
// Revision: $LastChangedRevision$
//
//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; either version 2 of the License, or
//(at your option) any later version.
//
//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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//Using this software in any meaning (reading, learning, copying, compiling,
//running) means that you agree that the Author(s) is (are) not responsible
//for cost, loss of data or any harm that may be caused directly or indirectly
//by usage of this softare or this documentation. The usage of this software
//is on your own risk. The installation and usage (starting/running) of this
//software may allow other people or application to access your computer and
//any attached devices and is highly dependent on the configuration of the
//software which must be done by the user of the software; the author(s) is
//(are) also not responsible for proper configuration and usage of the
//software, even if provoked by documentation provided together with
//the software.
//
//Any changes to this file according to the GPL as documented in the file
//gpl.txt aside this file in the shipment you received can be done to the
//lines that follows this copyright notice here, but changes must not be
//done inside the copyright notive above. A re-distribution must contain
//the intact and unchanged copyright notice.
//Contributions and changes to the program code must be marked as such.


package de.anomic.http;

import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class httpdByteCountOutputStream extends BufferedOutputStream {
    
    private static final Object syncObject = new Object();
    private static long globalByteCount = 0;    
    private boolean finished = false;    
    
    protected long byteCount;

    /**
     * Constructor of this class
     * @param outputStream the {@link OutputStream} to write to
     */
    public httpdByteCountOutputStream(OutputStream outputStream) {
        this(outputStream,0);
    }
    
    /**
     * Constructor of this class
     * @param outputStream the {@link OutputStream} to write to
     * @param initByteCount to initialize the bytecount with a given value
     */
    public httpdByteCountOutputStream(OutputStream outputStream, long initByteCount) {
        super(outputStream);
        this.byteCount = initByteCount;
    }    

    /** @see java.io.OutputStream#write(byte[]) */
    public void write(byte[] b) throws IOException {
        super.write(b);
        this.byteCount += b.length;
    }

    /** @see java.io.OutputStream#write(byte[], int, int) */
    public void write(byte[] b, int off, int len) throws IOException {        
        super.write(b, off, len);
        this.byteCount += len;
    }

    /** @see java.io.OutputStream#write(int) */
    public void write(int b) throws IOException {
        super.write(b);
        this.byteCount++;
    }

    /**
     * The number of bytes that have passed through this stream.
     * @return the number of bytes accumulated
     */
    public long getCount() {
        return this.byteCount;
    }
    
    public static long getGlobalCount() {
        synchronized (syncObject) {
            return globalByteCount;
        }
    }
    
    public static void resetCount() {
        synchronized (syncObject) {
            globalByteCount = 0;
        }
    }    
    
    public void finish() {
        if (this.finished) return;
        
        this.finished = true;
        synchronized (syncObject) {
            globalByteCount += this.byteCount;
        }        
    }
    
    protected void finalize() throws Throwable {
        if (!this.finished) 
            finish();
        super.finalize();
    }    
}