The version of Apache log4j used by SoundHelix.

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v1_2_15_rc4 :: examples /

MyPatternLayout.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package examples;

import org.apache.log4j.*;
import org.apache.log4j.helpers.PatternParser;

/**

  Example showing how to extend PatternLayout to recognize additional
  conversion characters.  
  
  <p>In this case MyPatternLayout recognizes %# conversion pattern. It
  outputs the value of an internal counter which is also incremented
  at each call.

  <p>See <a href=doc-files/MyPatternLayout.java><b>source</b></a> code
  for more details.

  @see MyPatternParser
  @see org.apache.log4j.PatternLayout
  @author Anders Kristensen 
*/
public class MyPatternLayout extends PatternLayout {
  public
  MyPatternLayout() {
    this(DEFAULT_CONVERSION_PATTERN);
  }

  public
  MyPatternLayout(String pattern) {
    super(pattern);
  }
    
  public
  PatternParser createPatternParser(String pattern) {
    return new MyPatternParser(
      pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
  }
  
  public
  static void main(String[] args) {
    Layout layout = new MyPatternLayout("[counter=%.10#] - %m%n");
    Logger logger = Logger.getLogger("some.cat");
    logger.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT));
    logger.debug("Hello, log");
    logger.info("Hello again...");    
  }
}
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