Examples of java.util.logging.Handler

java.util.logging.Handler
A Handler object takes log messages from a Logger and exports them. It might for example, write them to a console or write them to a file, or send them to a network logging service, or forward them to an OS log, or whatever.
A Handler can be disabled by doing a setLevel(Level.OFF) and can be re-enabled by doing a setLevel with an appropriate level.
Handler classes typically use LogManager properties to set default values for the Handler's Filter, Formatter, and Level. See the specific documentation for each concrete Handler class. @version 1.21, 04/07/06 @since 1.4

    }


    @Override
    public void setFormatter(Formatter newFormatter) throws SecurityException {
        super.setFormatter(newFormatter);
        Handler t = resolve();
        if(t!=null)
            t.setFormatter(newFormatter);
    }

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    }


    @Override
    public void setEncoding(String encoding) throws SecurityException, UnsupportedEncodingException {
        super.setEncoding(encoding);
        Handler t = resolve();
        if(t!=null)
            t.setEncoding(encoding);
    }

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    }


    @Override
    public void setFilter(Filter newFilter) throws SecurityException {
        super.setFilter(newFilter);
        Handler t = resolve();
        if(t!=null)
            t.setFilter(newFilter);
    }

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    }


    @Override
    public void setErrorManager(ErrorManager em) {
        super.setErrorManager(em);
        Handler t = resolve();
        if(t!=null)
            t.setErrorManager(em);
    }

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      // Guard against multiple calls
      if (redirectHandler != null)
        return;
      
      // Broadcast information to every user too
      redirectHandler = new Handler() {
      @Override
      public void publish(LogRecord record) {
        // Only display warnings and above
        if (record.getLevel().intValue() >= Level.WARNING.intValue()) {
          commandPacket.broadcastMessageSilently(record.getMessage(), permission);

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        getOAuthStore(base),
        clock,
        callbackGenerator);


    logger = Logger.getLogger(OAuthResponseParams.class.getName());
    logger.addHandler(new Handler() {
      @Override
      public void close() throws SecurityException {
      }


      @Override

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      // Have we asked for quiet mode?
      final boolean quiet = list.contains("-q") || list.contains("--quiet");
      final String[] params = list.toArray(new String[list.size()]);
      // Get root logger. Yes, it is an empty logger, Logger.getGlobal() doesn't work here
      final Logger globalLogger = Logger.getLogger(Strings.EMPTY);
      final Handler outHandler = new UncloseableStreamHandler(out, quiet);
      try
      {
         globalLogger.addHandler(outHandler);
         int returnCode = new MavenCli().doMain(params, getFaceted().getRoot().getFullyQualifiedName(), out, err);
         return returnCode == 0;

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        {
            java.util.logging.Logger rootLogger =
                java.util.logging.Logger.getLogger ("jacorb");
            rootLogger.setUseParentHandlers (false);
            rootLogger.setLevel (toJdkLogLevel (level));
            Handler handler = new ConsoleHandler(); 
            if (file != null && file.length() > 0)
            {
                try
                {
                    handler = new FileHandler
                    (
                        substituteImplname (file, config),
                        config.getAttributeAsBoolean (ATTR_LOG_APPEND, false)
                    );
                }
                catch (java.io.IOException ex)
                {
                    System.err.println ("could not write log file");
                }
            }
            handler.setLevel(toJdkLogLevel(level));
            handler.setFormatter (new JacORBLogFormatter());
            rootLogger.addHandler (handler);
        }
    }

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   /**
    * Used internally to parse appenders by IDREF name.
    */
   protected Handler findHandlerByName(Document doc, String appenderName)
   {
      Handler appender = (Handler) appenderBag.get(appenderName);


      if (appender != null)
      {
         return appender;
      }

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      String className = subst(appenderElement.getAttribute(CLASS_ATTR));
      debug("Class name: [" + className + ']');
      try
      {
         Object instance = instantiateByClassName(className, Handler.class, null);
         Handler appender = (Handler) instance;
         Properties beanProps = new Properties();
         String name = subst(appenderElement.getAttribute(NAME_ATTR));
         HandlerSkeleton handlerSkeleton = null;
         if( appender instanceof HandlerSkeleton )
         {
            handlerSkeleton = (HandlerSkeleton) appender;
            handlerSkeleton.setName(name);
         }


         NodeList children = appenderElement.getChildNodes();
         final int length = children.getLength();


         for (int loop = 0; loop < length; loop++)
         {
            Node currentNode = children.item(loop);


            /* We're only interested in Elements */
            if (currentNode.getNodeType() == Node.ELEMENT_NODE)
            {
               Element currentElement = (Element) currentNode;


               // Parse appender parameters 
               if (currentElement.getTagName().equals(PARAM_TAG))
               {
                  setParameter(currentElement, beanProps);
               }
               // Set appender layout
               else if (currentElement.getTagName().equals(LAYOUT_TAG))
               {
                  Formatter format = parseLayout(currentElement);
                  appender.setFormatter(format);
               }
               // Add filters
               else if (currentElement.getTagName().equals(FILTER_TAG))
               {
                  parseFilters(currentElement, appender);

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