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From l...@apache.org
Subject cvs commit: avalon-logkit/src/java/org/apache/log/output/io/rotate RotateStrategyByTimeOfDay.java
Date Mon, 07 Apr 2003 06:53:25 GMT
leif        2003/04/06 23:53:24

  Added:       src/java/org/apache/log/output/io/rotate
                        RotateStrategyByTimeOfDay.java
  Log:
  Add a new Rotation Strategy which will rotate a file at a specific time of day.
  
  Revision  Changes    Path
  1.1                  avalon-logkit/src/java/org/apache/log/output/io/rotate/RotateStrategyByTimeOfDay.java
  
  Index: RotateStrategyByTimeOfDay.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1997-2003 The Apache Software Foundation. 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
   *    Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software
   *    itself, if and wherever such third-party acknowledgments
   *    normally appear.
   *
   * 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
   *    must not be used to endorse or promote products derived from this
   *    software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * 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 APACHE SOFTWARE FOUNDATION 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 Apache Software Foundation. For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  package org.apache.log.output.io.rotate;
  
  import java.io.File;
  import java.util.Calendar;
  import java.util.GregorianCalendar;
  
  /**
   * Rotation stragety based on a specific time of day.
   *
   * @author <a href="mailto:leif@apache.org">Leif Mortenson</a>
   */
  public class RotateStrategyByTimeOfDay
      implements RotateStrategy
  {
      /** Constant that stores the the number of ms in 24 hours. */
      private static final long TIME_24_HOURS = 24 * 3600 * 1000;
      
      /** Time in ms that the current rotation started. */
      private long m_currentRotation;
  
      /**
       * Rotate logs at specific time of day.
       * By default do log rotation at 00:00:00 every day.
       */
      public RotateStrategyByTimeOfDay()
      {
          this( 0 );
      }
  
      /**
       * Rotate logs at specific time of day.
       *
       * @param time Offset in milliseconds into the day to perform the log rotation.
       */
      public RotateStrategyByTimeOfDay( final long time )
      {
          // Calculate the time at the beginning of the current day and add the time to that.
          final GregorianCalendar cal = new GregorianCalendar();
          cal.set( Calendar.MILLISECOND, 0 );
          cal.set( Calendar.SECOND, 0 );
          cal.set( Calendar.MINUTE, 0 );
          cal.set( Calendar.HOUR_OF_DAY, 0 );
          m_currentRotation = cal.getTimeInMillis() + time;
          
          // Make sure that the current rotation time is in the past.
          if ( m_currentRotation > System.currentTimeMillis() )
          {
              m_currentRotation -= TIME_24_HOURS;
          }
      }
  
      /**
       * reset interval history counters.
       */
      public void reset()
      {
          final long now = System.currentTimeMillis();
          
          // Make sure the currentRotation time is set so that the current system
          //  time is within 24 hours.
          while ( m_currentRotation + TIME_24_HOURS < now )
          {
              m_currentRotation += TIME_24_HOURS;
          }
      }
  
      /**
       * Check if now a log rotation is neccessary.
       * If the time of the current rotation + 24 hours is less than the current time.
       *  If not then a rotation is needed.
       *
       * @param data the last message written to the log system
       * @param file not used
       * @return boolean return true if log rotation is neccessary, else false
       */
      public boolean isRotationNeeded( final String data, final File file )
      {
          final long now = System.currentTimeMillis();
          if ( m_currentRotation + TIME_24_HOURS < now )
          {
              // Needs to be rotated.
              return true;
          }
          else
          {
              return false;
          }
      }
  }
  
  
  
  

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