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


    void addRepository(ClassLoader cl) {
  if( ht.get(cl) != null ) {
      throw new IllegalStateException("ClassLoader " + cl + " already registered");
  }
  ht.put(cl, new Hierarchy(new RootCategory( defLevel)));
    }

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    }
         
    // the returned value is guaranteed to be non-null
    public LoggerRepository getLoggerRepository() {
  ClassLoader cl = Thread.currentThread().getContextClassLoader();
  Hierarchy hierarchy = (Hierarchy) ht.get(cl);
  
  if(hierarchy == null) {
      hierarchy = new Hierarchy(new RootCategory(defLevel));
      ht.put(cl, hierarchy);
  } 
  return hierarchy;
    }

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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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        if ((logpath != null) && (logpath.trim().length() != 0))
        {
            logfile = logpath + _fs + logfile;
        }
        _creator =
            new Hierarchy(new RootCategory(Logger.getRootLogger()
                .getLevel()));
        try
        {
            new FileInputStream(logfile).close();
            new PropertyConfigurator().doConfigure(logfile, _creator);

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

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    if (loggingContextName == null) {
      return defaultRepository;
    } 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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        LoggerRepository repository = this.repository.get(ccl == null ? NO_CCL_CLASSLOADER : ccl.hashCode());
        if (repository == null)
        {
            final RootLogger root = new RootLogger(Level.INFO);
            repository = new Hierarchy(root);


            try
            {
                ConfigWatchDog configWatchDog = null;
                if (ccl instanceof MuleApplicationClassLoader)

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    t = Category.exists("a.b.c"); assertSame(a_b_c, t);
  }


  public
  void testHierarchy1() {
    Hierarchy h = new Hierarchy( new RootCategory(Priority.ERROR));
    Category a0 = h.getInstance("a");
    assertEquals("a", a0.getName());
    assertNull(a0.getPriority());
    assertSame(Priority.ERROR, a0.getChainedPriority());


    Category a1 = h.getInstance("a");
    assertSame(a0, a1);

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                if ( waRootKey == null || waRootKey.length() == 0 )
                {
                    waRootKey = LOG4J_CONFIG_WEB_APPLICATION_ROOT_KEY_DEFAULT;
                }
                p.setProperty(waRootKey,rootPath);
                isolatedHierarchy = new Hierarchy(new RootCategory(Level.INFO));
                new PropertyConfigurator().doConfigure(p,isolatedHierarchy);
                IsolatedLog4JLogger.setHierarchy(isolatedHierarchy);
                log = LogFactory.getLog(this.getClass());
                log.info("IsolatedLog4JLogger configured");
            }

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  cat.info("Waiting to accept a new client.");
  Socket socket = serverSocket.accept();
  InetAddress inetAddress =  socket.getInetAddress();
  cat.info("Connected to client at " + inetAddress);


  Hierarchy h = (Hierarchy) server.hierarchyMap.get(inetAddress);
  if(h == null) {
    h = server.configureHierarchy(inetAddress);
  } 


  cat.info("Starting new socket node.");

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