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; 018 019/** 020 * Appenders may delegate their error handling to <code>ErrorHandlers</code>. 021 * TODO if the appender interface is simplified, then error handling could just be done by wrapping 022 * a nested appender. (RG) Please look at DefaultErrorHandler. It's purpose is to make sure the console 023 * or error log isn't flooded with messages. I'm still considering the Appender refactoring. 024 */ 025public interface ErrorHandler { 026 027 /** 028 * Handle an error with a message. 029 * @param msg The message. 030 */ 031 void error(String msg); 032 033 /** 034 * Handle an error with a message and an exception. 035 * @param msg The message. 036 * @param t The Throwable. 037 */ 038 void error(String msg, Throwable t); 039 040 /** 041 * Handle an error with a message, and exception and a logging event. 042 * @param msg The message. 043 * @param event The LogEvent. 044 * @param t The Throwable. 045 */ 046 void error(String msg, LogEvent event, Throwable t); 047}