/* * Copyright (c) 2000 jPOS.org.  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 acknowledgment: *    "This product includes software developed by the jPOS project  *    (http://www.jpos.org/)". Alternately, this acknowledgment may  *    appear in the software itself, if and wherever such third-party  *    acknowledgments normally appear. * * 4. The names "jPOS" and "jPOS.org" must not be used to endorse  *    or promote products derived from this software without prior  *    written permission. For written permission, please contact  *    license@jpos.org. * * 5. Products derived from this software may not be called "jPOS", *    nor may "jPOS" appear in their name, without prior written *    permission of the jPOS project. * * 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 JPOS PROJECT 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 jPOS Project.  For more * information please see <http://www.jpos.org/>. */package org.jpos.util;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintStream;import java.util.Date;import java.util.Timer;import java.util.TimerTask;import org.jpos.core.Configurable;import org.jpos.core.Configuration;import org.jpos.core.ConfigurationException;/** * Rotates logs * @author <a href="mailto:apr@cs.com.uy">Alejandro P. Revilla</a> * @version $Revision: 1.19 $ $Date: 2005/02/04 20:49:28 $ * @see org.jpos.core.Configurable * @since jPOS 1.2 */public class RotateLogListener extends SimpleLogListener     implements Configurable, Destroyable{    FileOutputStream f;    String logName;    int maxCopies;    long sleepTime;    long maxSize;    int  msgCount;    Rotate rotate;    public static final int CHECK_INTERVAL = 100;    public static final long DEFAULT_MAXSIZE = 10000000;    /**     * @param name base log filename     * @param sleepTime switch logs every t seconds     * @param maxCopies number of old logs     * @param maxSize in bytes      */    public RotateLogListener         (String logName, int sleepTime, int maxCopies, long maxSize)         throws IOException    {        super();        this.logName   = logName;        this.maxCopies = maxCopies;        this.sleepTime = sleepTime * 1000;        this.maxSize   = maxSize;        f = null;        openLogFile ();        Timer timer = DefaultTimer.getTimer();        if (sleepTime != 0) {            timer.schedule (rotate = new Rotate(),                     this.sleepTime, this.sleepTime);        }    }    public RotateLogListener         (String logName, int sleepTime, int maxCopies)         throws IOException    {        this (logName, sleepTime, maxCopies, DEFAULT_MAXSIZE);     }    public RotateLogListener () {        super();    }   /**    * Configure this RotateLogListener<br>    * Properties:<br>    * <ul>    *  <li>file      base log filename    *  <li>[window]  in seconds (default 0 - never rotate)    *  <li>[count]   number of copies (default 0 == single copy)    *  <li>[maxsize] max log size in bytes (aprox)    * </ul>    * @param cfg Configuration     * @throws ConfigurationException    */    public void setConfiguration (Configuration cfg)        throws ConfigurationException    {        maxCopies = cfg.getInt  ("copies");        sleepTime = cfg.getInt  ("window") * 1000;        logName   = cfg.get     ("file");        maxSize   = cfg.getLong ("maxsize");        maxSize   = maxSize <= 0 ? DEFAULT_MAXSIZE : maxSize;        try {            openLogFile();        } catch (IOException e) {            throw new ConfigurationException (e);        }        Timer timer = DefaultTimer.getTimer();        if (sleepTime != 0)             timer.schedule (rotate = new Rotate(), sleepTime, sleepTime);    }    public synchronized LogEvent log (LogEvent ev) {        if (msgCount++ > CHECK_INTERVAL) {            checkSize();            msgCount = 0;        }                return super.log (ev);    }    private synchronized void openLogFile() throws IOException {        if (f != null)            f.close();        f = new FileOutputStream (logName, true);        setPrintStream (new PrintStream(f));    }    private synchronized void closeLogFile() throws IOException {        if (f != null)            f.close();        f = null;    }    public synchronized void logRotate ()        throws IOException    {        super.close ();        setPrintStream (null);        closeLogFile ();        for (int i=maxCopies; i>0; ) {            File dest   = new File (logName + "." + i);            File source = new File (logName + ((--i > 0) ? ("." + i) : ""));            dest.delete();            source.renameTo(dest);        }        openLogFile();    }    protected synchronized void logDebug (String msg) {        if (p != null) {            p.println ("<log realm=\"rotate-log-listener\" at=\""+new Date().toString() +"\">");            p.println ("   "+msg);            p.println ("</log>");        }    }    private void checkSize() {        File logFile = new File (logName);        if (logFile.length() > maxSize) {            try {                logDebug ("maxSize ("+maxSize+") threshold reached");                logRotate();            } catch (IOException e) {                e.printStackTrace (System.err);            }        }    }    public class Rotate extends TimerTask {        public void run() {            try {                logDebug ("time exceeded - log rotated");                logRotate();            } catch (IOException e) {                e.printStackTrace (System.err);            }        }    }    public void destroy () {        if (rotate != null)            rotate.cancel ();        try {            closeLogFile ();        } catch (IOException e) {            // nothing we can do.        }    }}