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.async; 018 019import com.lmax.disruptor.ExceptionHandler; 020 021/** 022 * Default disruptor exception handler for errors that occur in the AsyncLogger background thread. 023 */ 024public class AsyncLoggerDefaultExceptionHandler implements ExceptionHandler<RingBufferLogEvent> { 025 026 @Override 027 public void handleEventException(final Throwable throwable, final long sequence, final RingBufferLogEvent event) { 028 final StringBuilder sb = new StringBuilder(512); 029 sb.append("AsyncLogger error handling event seq=").append(sequence).append(", value='"); 030 try { 031 sb.append(event); 032 } catch (final Exception ignored) { 033 sb.append("[ERROR calling ").append(event.getClass()).append(".toString(): "); 034 sb.append(ignored).append("]"); 035 } 036 sb.append("':"); 037 System.err.println(sb); 038 throwable.printStackTrace(); 039 } 040 041 @Override 042 public void handleOnStartException(final Throwable throwable) { 043 System.err.println("AsyncLogger error starting:"); 044 throwable.printStackTrace(); 045 } 046 047 @Override 048 public void handleOnShutdownException(final Throwable throwable) { 049 System.err.println("AsyncLogger error shutting down:"); 050 throwable.printStackTrace(); 051 } 052}