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

    } else {
      String key = s.substring(0, i);
      
      File configFile = new File(dir, key+CONFIG_FILE_EXT);
      if(configFile.exists()) {
  Hierarchy h = new Hierarchy(new RootCategory(Priority.DEBUG));
  hierarchyMap.put(inetAddress, h);
  
  try {
    new PropertyConfigurator().doConfigure(configFile.toURL(), h);
  } catch(MalformedURLException e) {

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  Hierarchy genericHierarchy() {
    if(genericHierarchy == null) {
      File f = new File(dir, GENERIC+CONFIG_FILE_EXT);
      if(f.exists()) {
  genericHierarchy = new Hierarchy(new RootCategory(Priority.DEBUG));
  try {
    new PropertyConfigurator().doConfigure(f.toURL(),
                 genericHierarchy);
  } catch(MalformedURLException e) {
    cat.error("Could not convert"+f

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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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    } else {
      String key = s.substring(0, i);
      
      File configFile = new File(dir, key+CONFIG_FILE_EXT);
      if(configFile.exists()) {
  Hierarchy h = new Hierarchy(new RootCategory(Priority.DEBUG));
  hierarchyMap.put(inetAddress, h);
  
  new PropertyConfigurator().doConfigure(configFile.getAbsolutePath(), h);


  return h;

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

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  void testDisable1() {
    CountingAppender caRoot = new CountingAppender();
    Category root = Category.getRoot();    
    root.addAppender(caRoot);


    Hierarchy h = Category.getDefaultHierarchy();
    h.disableDebug();
    assertEquals(caRoot.counter, 0);     


    root.debug(MSG); assertEquals(caRoot.counter, 0);  
    root.info(MSG); assertEquals(caRoot.counter, 1);  
    root.log(Priority.WARN, MSG); assertEquals(caRoot.counter, 2);  
    root.warn(MSG); assertEquals(caRoot.counter, 3);  


    h.disableInfo();
    root.debug(MSG); assertEquals(caRoot.counter, 3);  
    root.info(MSG); assertEquals(caRoot.counter, 3);  
    root.log(Priority.WARN, MSG); assertEquals(caRoot.counter, 4);  
    root.error(MSG); assertEquals(caRoot.counter, 5);  
    root.log(Priority.ERROR, MSG); assertEquals(caRoot.counter, 6);  


    h.disableAll();
    root.debug(MSG); assertEquals(caRoot.counter, 6);  
    root.info(MSG); assertEquals(caRoot.counter, 6);  
    root.log(Priority.WARN, MSG); assertEquals(caRoot.counter, 6);  
    root.error(MSG); assertEquals(caRoot.counter, 6);  
    root.log(Priority.FATAL, MSG); assertEquals(caRoot.counter, 6);  
    root.log(Priority.FATAL, MSG); assertEquals(caRoot.counter, 6);  


    h.disable(Priority.FATAL);
    root.debug(MSG); assertEquals(caRoot.counter, 6);  
    root.info(MSG); assertEquals(caRoot.counter, 6);  
    root.log(Priority.WARN, MSG); assertEquals(caRoot.counter, 6);  
    root.error(MSG); assertEquals(caRoot.counter, 6);
    root.log(Priority.ERROR, MSG); assertEquals(caRoot.counter, 6);

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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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     * @param xmlProperties
     *            Needs to be an XML file.
     */
    public PluginLogManager(Plugin plugin, URL xmlProperties) {
        fLog = plugin.getLog();
        fHierarchy = new Hierarchy(new RootLogger(Level.DEBUG));
        fHierarchy.addHierarchyEventListener(new LogListener());
        new DOMConfigurator().doConfigure(xmlProperties, fHierarchy);


        PluginLogManagerRegistry.getInstance().addLogManager(this);
    }

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     * @param properties
     *            the properties file
     */
    public PluginLogManager(Plugin plugin, Properties properties) {
        fLog = plugin.getLog();
        fHierarchy = new Hierarchy(new RootLogger(Level.DEBUG));
        fHierarchy.addHierarchyEventListener(new LogListener());
        new PropertyConfigurator().doConfigure(properties, fHierarchy);


        PluginLogManagerRegistry.getInstance().addLogManager(this);
    }

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