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annotate src/goodjava/logger/DailyRollingFileAppender.java @ 1594:329197048ff0

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add DailyRollingFileAppender
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 21 Mar 2021 00:59:58 -0600
parents
children 8a717f0b7f45
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1594
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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 }