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annotate src/goodjava/logger/DailyRollingFileAppender.java @ 1598:c78d6a4e2d9a
web logging
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 04 Apr 2021 15:09:51 -0600 |
parents | 329197048ff0 |
children | 8a717f0b7f45 |
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1 package goodjava.logger; |
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2 |
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3 import java.io.FileWriter; |
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4 import java.io.IOException; |
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5 import java.text.DateFormat; |
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6 import java.util.Date; |
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7 |
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8 |
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9 public final class DailyRollingFileAppender extends WriterAppender { |
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10 private final DateFormat format; |
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11 private String fileName; |
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12 |
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13 public DailyRollingFileAppender(Layout layout,DateFormat format) { |
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14 super(layout,null); |
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15 this.format = format; |
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16 } |
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17 |
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18 public synchronized void append(LoggingEvent event) { |
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19 String newFileName = format.format(new Date()); |
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20 if( !newFileName.equals(fileName) ) { |
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21 fileName = newFileName; |
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22 if( writer != null ) |
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23 close(); |
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24 try { |
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25 writer = new FileWriter(fileName,true); |
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26 } catch(IOException e) { |
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27 throw new RuntimeException(e); |
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28 } |
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29 } |
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30 super.append(event); |
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31 } |
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32 } |