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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