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 java.io.Serializable; 020import java.util.concurrent.TimeUnit; 021 022import org.apache.logging.log4j.Logger; 023import org.apache.logging.log4j.core.Appender; 024import org.apache.logging.log4j.core.ErrorHandler; 025import org.apache.logging.log4j.core.LogEvent; 026import org.apache.logging.log4j.status.StatusLogger; 027 028/** 029 * 030 */ 031public class DefaultErrorHandler implements ErrorHandler, Serializable { 032 033 private static final long serialVersionUID = 1L; 034 035 private static final Logger LOGGER = StatusLogger.getLogger(); 036 037 private static final int MAX_EXCEPTIONS = 3; 038 039 private static final long EXCEPTION_INTERVAL = TimeUnit.MINUTES.toNanos(5); 040 041 private int exceptionCount = 0; 042 043 private long lastException = System.nanoTime() - EXCEPTION_INTERVAL - 1; 044 045 private final Appender appender; 046 047 public DefaultErrorHandler(final Appender appender) { 048 this.appender = appender; 049 } 050 051 052 /** 053 * Handle an error with a message. 054 * @param msg The message. 055 */ 056 @Override 057 public void error(final String msg) { 058 final long current = System.nanoTime(); 059 if (current - lastException > EXCEPTION_INTERVAL || exceptionCount++ < MAX_EXCEPTIONS) { 060 LOGGER.error(msg); 061 } 062 lastException = current; 063 } 064 065 /** 066 * Handle an error with a message and an exception. 067 * @param msg The message. 068 * @param t The Throwable. 069 */ 070 @Override 071 public void error(final String msg, final Throwable t) { 072 final long current = System.nanoTime(); 073 if (current - lastException > EXCEPTION_INTERVAL || exceptionCount++ < MAX_EXCEPTIONS) { 074 LOGGER.error(msg, t); 075 } 076 lastException = current; 077 if (!appender.ignoreExceptions() && t != null && !(t instanceof AppenderLoggingException)) { 078 throw new AppenderLoggingException(msg, t); 079 } 080 } 081 082 /** 083 * Handle an error with a message, and exception and a logging event. 084 * @param msg The message. 085 * @param event The LogEvent. 086 * @param t The Throwable. 087 */ 088 @Override 089 public void error(final String msg, final LogEvent event, final Throwable t) { 090 final long current = System.nanoTime(); 091 if (current - lastException > EXCEPTION_INTERVAL || exceptionCount++ < MAX_EXCEPTIONS) { 092 LOGGER.error(msg, t); 093 } 094 lastException = current; 095 if (!appender.ignoreExceptions() && t != null && !(t instanceof AppenderLoggingException)) { 096 throw new AppenderLoggingException(msg, t); 097 } 098 } 099}