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 org.apache.logging.log4j.status.StatusLogger; 020 021/** 022 * <b>Consider this class private.</b> 023 * <p> 024 * Logs a warning to the {@link StatusLogger} when events are logged out of order to avoid deadlocks. 025 * </p> 026 */ 027public final class AsyncQueueFullMessageUtil { 028 private AsyncQueueFullMessageUtil() { 029 // Utility Class 030 } 031 032 /** 033 * Logs a warning to the {@link StatusLogger} explaining why a message appears out of order in the appender. 034 */ 035 public static void logWarningToStatusLogger() { 036 StatusLogger.getLogger() 037 .warn("LOG4J2-2031: Log4j2 logged an event out of order to prevent deadlock caused by domain " + 038 "objects logging from their toString method when the async queue is full"); 039 } 040}