Examples of org.apache.log4j.Hierarchy

org.apache.log4j.Hierarchy
This class is specialized in retrieving loggers by name and also maintaining the logger hierarchy.
The casual user does not have to deal with this class directly.
The structure of the logger hierarchy is maintained by the {@link #getLogger} method. The hierarchy is such that children linkto their parent but parents do not have any pointers to their children. Moreover, loggers can be instantiated in any order, in particular descendant before ancestor.
In case a descendant is created before a particular ancestor, then it creates a provision node for the ancestor and adds itself to the provision node. Other descendants of the same ancestor add themselves to the previously created provision node. @author Ceki Gülcü @author Mark Womack


  LoggerRepository  genericHierarchy() {
    if(genericHierarchy == null) {
      File f = new File(dir, GENERIC+CONFIG_FILE_EXT);
      if(f.exists()) {
  genericHierarchy = new Hierarchy(new RootLogger(Level.DEBUG));
  new PropertyConfigurator().doConfigure(f.getAbsolutePath(), genericHierarchy);
      } else {
  cat.warn("Could not find config file ["+f+
     "]. Will use the default hierarchy.");
  genericHierarchy = LogManager.getLoggerRepository();

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   * Performs any necessary initialisation.
   */
  private void init() {
    if (appender == null) {
      // need to create a new log4j hierarchy so values in log4j.xml are ignored
      observerLogger = new Hierarchy(new RootLogger(Level.DEBUG)).getLogger(this.getClass().getName());
      PatternLayout layout = new PatternLayout();
      layout.setConversionPattern(conversionPattern);
      try {
        appender = new RollingFileAppender(layout, baseLogPath + jobRunId + ".log");
        appender.setMaxBackupIndex(maxBackupIndex);

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                    LOG4J_CONFIG_FILE_DEFAULT);
            log4jFile = getRealPath(log4jFile);
            Properties p = new Properties();
            p.load(new FileInputStream(log4jFile));
            p.setProperty(APPLICATION_ROOT_KEY, context.getApplicationRoot());
            Hierarchy h = new Hierarchy(new RootCategory(Level.INFO));
            new PropertyConfigurator().doConfigure(p,h);
            IsolatedLog4JLogger.setHierarchy(h);
            
            log.info("Configured log4j from " + log4jFile);
            log.info("Starting Jetspeed Engine ("+getClass().getName()+") at "+format.format(startTime));

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/*     */     }
/* 175 */     String key = s.substring(0, i);
/*     */ 
/* 177 */     File configFile = new File(this.dir, key + CONFIG_FILE_EXT);
/* 178 */     if (configFile.exists()) {
/* 179 */       Hierarchy h = new Hierarchy(new RootLogger((Level)Priority.DEBUG));
/* 180 */       this.hierarchyMap.put(inetAddress, h);
/*     */ 
/* 182 */       new PropertyConfigurator().doConfigure(configFile.getAbsolutePath(), h);
/*     */ 
/* 184 */       return h;

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/*     */   LoggerRepository genericHierarchy()
/*     */   {
/* 193 */     if (this.genericHierarchy == null) {
/* 194 */       File f = new File(this.dir, GENERIC + CONFIG_FILE_EXT);
/* 195 */       if (f.exists()) {
/* 196 */         this.genericHierarchy = new Hierarchy(new RootLogger((Level)Priority.DEBUG));
/* 197 */         new PropertyConfigurator().doConfigure(f.getAbsolutePath(), this.genericHierarchy);
/*     */       } else {
/* 199 */         cat.warn("Could not find config file [" + f + "]. Will use the default hierarchy.");
/*     */ 
/* 201 */         this.genericHierarchy = LogManager.getLoggerRepository();

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                    LOG4J_CONFIG_FILE_DEFAULT);
            log4jFile = getRealPath(log4jFile);
            Properties p = new Properties();
            p.load(new FileInputStream(log4jFile));
            p.setProperty(APPLICATION_ROOT_KEY, context.getApplicationRoot());
            Hierarchy h = new Hierarchy(new RootCategory(Level.INFO));
            new PropertyConfigurator().doConfigure(p,h);
            IsolatedLog4JLogger.setHierarchy(h);
            
            log.info("Configured log4j from " + log4jFile);
            log.info("Starting Jetspeed Engine ("+getClass().getName()+") at "+format.format(startTime));

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            theSelector = new MyRepositorySelector();
            LogManager.setRepositorySelector(theSelector, null);
            initialized = true;
        }


        Hierarchy hierarchy = new Hierarchy(new RootCategory(Level.ERROR));


        loadLog4JConfig(config, hierarchy);
        ClassLoader loader = Thread.currentThread().getContextClassLoader();
        repositories.put(loader, hierarchy);
    }

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         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
         DocumentBuilder builder = factory.newDocumentBuilder();
         Document doc = builder.parse(log4JConfig);
         DOMConfigurator conf = new DOMConfigurator();


         Hierarchy hierarchy = new Hierarchy(new RootCategory(Level.DEBUG));
         conf.doConfigure(doc.getDocumentElement(), hierarchy);
         repositories.put(classloader, hierarchy);
      }
      catch (Exception e)
      {

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   {
      if (classloader == null)
      {
         throw new IllegalArgumentException("No classloader provided");
      }
      Hierarchy hierarchy = (Hierarchy)repositories.remove(classloader);
      if (hierarchy != null)
      {
         hierarchy.shutdown();
      }
      else
      {
         System.out.print("No hierarchy found for classloader : ");
         Writer writer = new PrintWriter(System.out);

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