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 */ 017 018package org.apache.log4j.varia; 019 020import org.apache.log4j.spi.Filter; 021import org.apache.log4j.spi.LoggingEvent; 022 023 024/** 025 This filter drops all logging events. 026 027 <p>You can add this filter to the end of a filter chain to 028 switch from the default "accept all unless instructed otherwise" 029 filtering behaviour to a "deny all unless instructed otherwise" 030 behaviour. 031 032 033 @author Ceki Gülcü 034 035 @since 0.9.0 */ 036public class DenyAllFilter extends Filter { 037 038 /** 039 Returns <code>null</code> as there are no options. 040 041 @deprecated We now use JavaBeans introspection to configure 042 components. Options strings are no longer needed. 043 */ 044 public 045 String[] getOptionStrings() { 046 return null; 047 } 048 049 050 /** 051 No options to set. 052 053 @deprecated Use the setter method for the option directly instead 054 of the generic <code>setOption</code> method. 055 */ 056 public 057 void setOption(String key, String value) { 058 } 059 060 /** 061 Always returns the integer constant {@link Filter#DENY} 062 regardless of the {@link LoggingEvent} parameter. 063 064 @param event The LoggingEvent to filter. 065 @return Always returns {@link Filter#DENY}. 066 */ 067 public 068 int decide(LoggingEvent event) { 069 return Filter.DENY; 070 } 071} 072