The version of Apache log4j used by SoundHelix.

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v1.3alpha8-temp :: src / java / org / apache / log4j / varia /

NullAppender.java

/*
 * Copyright 1999,2005 The Apache Software Foundation.
 *
 * Licensed 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 org.apache.log4j.varia;


import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.AppenderSkeleton;

/**
  * A NullAppender merely exists, it never outputs a message to any
  * device.  
  * @author Ceki Gülc¨
  */
public class NullAppender extends AppenderSkeleton {

  private static NullAppender instance = new NullAppender();

  public NullAppender() {
      super(true);
  }

  /**
   * Whenever you can, use this method to retreive an instance instead
   * of instantiating a new one with <code>new</code>.
   * */
  static public NullAppender getInstance() {
    return instance;
  }

  public void close() {
  }

  /**
   * Does not do anything. 
   * */
  public void doAppend(LoggingEvent event) {
  }

  /**
   * Does not do anything. 
   * */
  protected void append(LoggingEvent event) {
  }
    /**
     * Gets whether appender requires a layout.
     * @return false
     */
  public boolean requiresLayout() {
      return false;
  }


}
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