Source Code Cross Referenced for RotateStrategyByDate.java in  » Development » LogKit » org » apache » log » output » io » rotate » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » LogKit » org.apache.log.output.io.rotate 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ====================================================================
002:         * The Apache Software License, Version 1.1
003:         *
004:         * Copyright (c) 1997-2003 The Apache Software Foundation. All rights
005:         * reserved.
006:         *
007:         * Redistribution and use in source and binary forms, with or without
008:         * modification, are permitted provided that the following conditions
009:         * are met:
010:         *
011:         * 1. Redistributions of source code must retain the above copyright
012:         *    notice, this list of conditions and the following disclaimer.
013:         *
014:         * 2. Redistributions in binary form must reproduce the above copyright
015:         *    notice, this list of conditions and the following disclaimer in
016:         *    the documentation and/or other materials provided with the
017:         *    distribution.
018:         *
019:         * 3. The end-user documentation included with the redistribution,
020:         *    if any, must include the following acknowledgment:
021:         *    "This product includes software developed by the
022:         *    Apache Software Foundation (http://www.apache.org/)."
023:         *    Alternately, this acknowledgment may appear in the software
024:         *    itself, if and wherever such third-party acknowledgments
025:         *    normally appear.
026:         *
027:         * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
028:         *    must not be used to endorse or promote products derived from this
029:         *    software without prior written permission. For written
030:         *    permission, please contact apache@apache.org.
031:         *
032:         * 5. Products derived from this software may not be called "Apache",
033:         *    nor may "Apache" appear in their name, without prior written
034:         *    permission of the Apache Software Foundation.
035:         *
036:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039:         * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047:         * SUCH DAMAGE.
048:         * ====================================================================
049:         *
050:         * This software consists of voluntary contributions made by many
051:         * individuals on behalf of the Apache Software Foundation. For more
052:         * information on the Apache Software Foundation, please see
053:         * <http://www.apache.org/>.
054:         */
055:        package org.apache.log.output.io.rotate;
056:
057:        import java.io.File;
058:        import java.text.SimpleDateFormat;
059:        import java.util.Date;
060:
061:        /**
062:         * Rotation stragety based on SimpleDateFormat.
063:         *
064:         * @author <a href="mailto:dev@avalon.apache.org">Avalon Development Team</a>
065:         * @author <a href="mailto:colus@apache.org">Eung-ju Park</a>
066:         * @version $Revision: 1.10 $ $Date: 2003/02/09 23:33:24 $
067:         */
068:        public class RotateStrategyByDate implements  RotateStrategy {
069:            private SimpleDateFormat m_format;
070:            private Date m_date;
071:            private String m_current;
072:
073:            /**
074:             * Creation of a new rotation strategy based on a date policy.
075:             */
076:            public RotateStrategyByDate() {
077:                this ("yyyyMMdd");
078:            }
079:
080:            /**
081:             * Creation of a new rotation strategy based on a date policy
082:             * using a supplied pattern.
083:             * @param pattern the message formatting pattern
084:             */
085:            public RotateStrategyByDate(final String pattern) {
086:                m_format = new SimpleDateFormat(pattern);
087:                m_date = new Date();
088:                m_current = m_format.format(m_date);
089:            }
090:
091:            /**
092:             * Reset the strategy.
093:             */
094:            public void reset() {
095:                m_date.setTime(System.currentTimeMillis());
096:                m_current = m_format.format(m_date);
097:            }
098:
099:            /**
100:             * Test is a rotation is required.  Documentation pending ??
101:             *
102:             * @param data not used
103:             * @param file not used
104:             * @return TRUE if a rotation is required else FALSE
105:             */
106:            public boolean isRotationNeeded(final String data, final File file) {
107:                m_date.setTime(System.currentTimeMillis());
108:                if (m_current.equals(m_format.format(m_date))) {
109:                    return false;
110:                }
111:                return true;
112:            }
113:        }
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