001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.appender; 018 019import org.apache.logging.log4j.core.Appender; 020import org.apache.logging.log4j.core.Core; 021import org.apache.logging.log4j.core.LogEvent; 022import org.apache.logging.log4j.core.config.Property; 023import org.apache.logging.log4j.core.config.plugins.Plugin; 024import org.apache.logging.log4j.core.config.plugins.PluginAttribute; 025import org.apache.logging.log4j.core.config.plugins.PluginFactory; 026 027/** 028 * An Appender that ignores log events. Use for compatibility with version 1.2 029 * and handy for composing a {@link ScriptAppenderSelector}. 030 */ 031@Plugin(name = NullAppender.PLUGIN_NAME, category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true) 032public class NullAppender extends AbstractAppender { 033 034 public static final String PLUGIN_NAME = "Null"; 035 036 @PluginFactory 037 public static NullAppender createAppender( 038 @PluginAttribute(value = "name", defaultString = "null") final String name) { 039 return new NullAppender(name); 040 } 041 042 private NullAppender(final String name) { 043 super(name, null, null, true, Property.EMPTY_ARRAY); 044 } 045 046 @Override 047 public void append(final LogEvent event) { 048 // Do nothing 049 } 050 051}