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

         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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    public Log4JConfAdapter()
    {
        /** 
         * Copied from org.apache.log4j.LogManager.
         */
        super( new Hierarchy( new RootCategory( Level.ALL ) ) );
    }

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    } else {
      String key = s.substring(0, i);


      File configFile = new File(dir, key+CONFIG_FILE_EXT);
      if(configFile.exists()) {
  Hierarchy h = new Hierarchy(new RootLogger(Level.DEBUG));
  hierarchyMap.put(inetAddress, h);


  new PropertyConfigurator().doConfigure(configFile.getAbsolutePath(), h);


  return h;

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  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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    public Log4JConfAdapter()
    {
        /** 
         * Copied from org.apache.log4j.LogManager.
         */
        super( new Hierarchy( new RootCategory( Level.ALL ) ) );
    }

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    super.setUp();
    appendConfigFile = "append-with-drivermanager1.xml";
    readConfigFile = "read-with-drivermanager1.xml";


    witnessEvents = new Vector();
    lrWrite = new Hierarchy(new RootLogger(Level.DEBUG));
    lrRead = new LoggerRepositoryExImpl(new Hierarchy(new RootLogger(Level.DEBUG)));




    //
    //   attempt to define tables in in-memory database
    //      will throw exception if already defined.

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    if (loggingContextName == null || Constants.DEFAULT_REPOSITORY_NAME.equals(loggingContextName)) {
      return LogManager.defaultLoggerRepository;
    } else {
      //System.out.println("loggingContextName is ["+loggingContextName+"]");
      Hierarchy hierarchy = (Hierarchy) hierMap.get(loggingContextName);


      if (hierarchy == null) {
        // create new hierarchy
        hierarchy = new Hierarchy(new RootLogger(Level.DEBUG));
        hierarchy.setName(loggingContextName);
        hierMap.put(loggingContextName, hierarchy);


        // configure log4j internal logging
        IntializationUtil.log4jInternalConfiguration(hierarchy);

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                    ctx.log("Unable to load custom Log4J configuration class '"
                            + configuratorName + "':  " + ex.getMessage());
                    return;
                }


                configurator.doConfigure(configURL, new Hierarchy(new RootLogger(Level.OFF)));
            }
            else if (configURL.getFile().endsWith(".xml"))
                DOMConfigurator.configure(configURL);
            else
                PropertyConfigurator.configure(configURL);

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    } else {
      String key = s.substring(0, i);


      File configFile = new File(dir, key+CONFIG_FILE_EXT);
      if(configFile.exists()) {
  Hierarchy h = new Hierarchy(new RootLogger(Level.DEBUG));
  hierarchyMap.put(inetAddress, h);


  new PropertyConfigurator().doConfigure(configFile.getAbsolutePath(), h);


  return h;

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