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annotate src/luan/modules/logging/Log4j.java @ 1365:6617763dfd76

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fix logging and lucene backup
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 12 Jun 2019 22:16:10 -0600
parents 7483108154bb
children
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1 package luan.modules.logging;
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2
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3 import java.util.Enumeration;
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4 import java.util.List;
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5 import java.util.ArrayList;
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6 import org.apache.log4j.Logger;
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7 import org.apache.log4j.LogManager;
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8 import org.apache.log4j.Hierarchy;
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9 import org.apache.log4j.Level;
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10 import org.apache.log4j.Appender;
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11 import org.apache.log4j.spi.LoggerRepository;
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12 import org.apache.log4j.spi.RootLogger;
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13 import org.apache.log4j.spi.RepositorySelector;
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14 import luan.Luan;
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15 import luan.LuanException;
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16 import luan.LuanTable;
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18
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19 public final class Log4j {
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20 private static final String KEY = "Logger.Repository";
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21 private static final LoggerRepository defaultLoggerRepository = LogManager.getLoggerRepository();
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22
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23 public static void newLoggerRepository(Luan luan) {
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24 Logger oldLogger = defaultLoggerRepository.getRootLogger();
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25 Logger newLogger = new RootLogger(Level.DEBUG);
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26 LoggerRepository lr = new Hierarchy(newLogger);
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27 for( Enumeration en = oldLogger.getAllAppenders(); en.hasMoreElements(); ) {
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28 Appender appender = (Appender)en.nextElement();
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29 newLogger.addAppender(appender);
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30 }
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31 luan.registry().put(KEY,lr);
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32 }
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33
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34 private static LoggerRepository getLoggerRepository(Luan luan) {
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35 LoggerRepository lr = (LoggerRepository)luan.registry().get(KEY);
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36 return lr != null ? lr : defaultLoggerRepository;
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37 }
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38
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39 static {
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40 LogManager.setRepositorySelector( new RepositorySelector() {
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41 public LoggerRepository getLoggerRepository() {
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42 Luan luan = LuanLogger.luan();
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43 return luan==null ? defaultLoggerRepository : Log4j.getLoggerRepository(luan);
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44 }
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45 }, new Object() );
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46 }
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47
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48 public static Logger getRootLogger(Luan luan) {
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49 return getLoggerRepository(luan).getRootLogger();
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50 }
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51
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52 public static Logger getLogger(Luan luan,String name) {
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53 return getLoggerRepository(luan).getLogger(name);
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54 }
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56 // because logger.removeAllAppenders() closes the appenders
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57 public static void removeAllAppenders(Logger logger) {
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58 List<Appender> list = new ArrayList<Appender>();
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59 for( Enumeration en = logger.getAllAppenders(); en.hasMoreElements(); ) {
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60 Appender appender = (Appender)en.nextElement();
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61 list.add(appender);
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62 }
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63 for( Appender appender : list ) {
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64 logger.removeAppender(appender);
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65 }
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66 if( logger.getAllAppenders().hasMoreElements() )
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67 throw new RuntimeException();
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68 }
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69 }