001/*
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2026, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v2.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.core.rolling;
015
016import ch.qos.logback.core.rolling.SizeAndTimeBasedFileNamingAndTriggeringPolicy.Usage;
017import ch.qos.logback.core.util.FileSize;
018
019public class SizeAndTimeBasedRollingPolicy<E> extends TimeBasedRollingPolicy<E> {
020
021    static long MAX_COMPRESSION_FACTOR = 20;
022
023    FileSize maxFileSize;
024
025    @Override
026    public void start() {
027        SizeAndTimeBasedFileNamingAndTriggeringPolicy<E> sizeAndTimeBasedFNATP = new SizeAndTimeBasedFileNamingAndTriggeringPolicy<E>(Usage.EMBEDDED);
028        if (maxFileSize == null) {
029            addError("maxFileSize property is mandatory.");
030            return;
031        } else {
032            addInfo("Archive files will be limited to [" + maxFileSize + "] each.");
033        }
034
035        sizeAndTimeBasedFNATP.setMaxFileSize(maxFileSize);
036        timeBasedFileNamingAndTriggeringPolicy = sizeAndTimeBasedFNATP;
037
038        if (!isUnboundedTotalSizeCap() && totalSizeCap.getSize() < maxFileSize.getSize()/MAX_COMPRESSION_FACTOR) {
039            addWarn("totalSizeCap of [" + totalSizeCap + "] is much smaller than maxFileSize [" + maxFileSize
040                    + "] which is non-sensical, even taking compression into account.");
041        }
042
043        // most work is done by the parent
044        super.start();
045    }
046
047    public void setMaxFileSize(FileSize aMaxFileSize) {
048        this.maxFileSize = aMaxFileSize;
049    }
050
051    @Override
052    public String toString() {
053        return "c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@" + this.hashCode();
054    }
055}