1 /*
   2  *  Copyright 2005 Juan F. Codagnone <juam at users dot sourceforge dot net>
   3  *
   4  *  Licensed under the Apache License, Version 2.0 (the "License");
   5  *  you may not use this file except in compliance with the License.
   6  *  You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *  Unless required by applicable law or agreed to in writing, software
  11  *  distributed under the License is distributed on an "AS IS" BASIS,
  12  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *  See the License for the specific language governing permissions and
  14  *  limitations under the License.
  15  */
  16 package ar.com.leak.iolsucker.view.common;
  17 
  18 import javax.swing.JComponent;
  19 import javax.swing.JTextArea;
  20 
  21 import org.apache.log4j.AppenderSkeleton;
  22 import org.apache.log4j.Layout;
  23 import org.apache.log4j.spi.LoggingEvent;
  24 
  25 /**
  26  * Appender de log4j, que loguea el contenido en textarea.
  27  *
  28  * @author Juan F. Codagnone
  29  * @since Mar 27, 2005
  30  */
  31 public class JTextAreaAppender extends AppenderSkeleton {
  32   /** visual component */
  33   private final JTextArea area = new JTextArea();
  34   /** layout log4j layout to use (injected) */
  35   private final Layout layout;
  36   /** number of rows to show */
  37   private static final int NUMBER_OF_ROWS = 10;
  38   /**
  39    * Crea el JTextAreaAppend.
  40    * @param layout log4j layout to use
  41    */
  42   public JTextAreaAppender(final Layout layout) {
  43     this.layout = layout;
  44     area.setRows(NUMBER_OF_ROWS);
  45     area.setEditable(false);
  46     area.setLineWrap(true);
  47   }
  48 
  49   /**
  50    * @return the visual component
  51    */
  52   public final JComponent asJComponent() {
  53     return area;
  54   }
  55 
  56   /** @see AppenderSkeleton#append(org.apache.log4j.spi.LoggingEvent) */
  57   protected final void append(final LoggingEvent event) {
  58     area.append(layout.format(event));
  59   }
  60 
  61   /** @see org.apache.log4j.Appender#close() */
  62   public final void close() {
  63     // nothing to do
  64   }
  65 
  66   /** @see org.apache.log4j.Appender#requiresLayout() */
  67   public final  boolean requiresLayout() {
  68     return false;
  69   }
  70 }