1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache license, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the license for the specific language governing permissions and 15 * limitations under the license. 16 */ 17 package org.apache.logging.log4j.core; 18 19 /** 20 * Appenders may delegate their error handling to <code>ErrorHandlers</code>. 21 * TODO if the appender interface is simplified, then error handling could just be done by wrapping 22 * a nested appender. (RG) Please look at DefaultErrorHandler. It's purpose is to make sure the console 23 * or error log isn't flooded with messages. I'm still considering the Appender refactoring. 24 */ 25 public interface ErrorHandler { 26 27 /** 28 * Handle an error with a message. 29 * @param msg The message. 30 */ 31 void error(String msg); 32 33 /** 34 * Handle an error with a message and an exception. 35 * @param msg The message. 36 * @param t The Throwable. 37 */ 38 void error(String msg, Throwable t); 39 40 /** 41 * Handle an error with a message, and exception and a logging event. 42 * @param msg The message. 43 * @param event The LogEvent. 44 * @param t The Throwable. 45 */ 46 void error(String msg, LogEvent event, Throwable t); 47 }