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.util; 018 019import java.nio.charset.Charset; 020import java.nio.charset.StandardCharsets; 021 022import org.apache.logging.log4j.util.PropertiesUtil; 023 024/** 025 * Log4j Constants. 026 */ 027public final class Constants { 028 029 /** 030 * Name of the system property to use to identify the LogEvent factory. 031 */ 032 public static final String LOG4J_LOG_EVENT_FACTORY = "Log4jLogEventFactory"; 033 034 /** 035 * Name of the system property to use to identify the ContextSelector Class. 036 */ 037 public static final String LOG4J_CONTEXT_SELECTOR = "Log4jContextSelector"; 038 039 /** 040 * Property name for the default status (internal log4j logging) level to use if not specified in configuration. 041 */ 042 public static final String LOG4J_DEFAULT_STATUS_LEVEL = "Log4jDefaultStatusLevel"; 043 044 /** 045 * JNDI context name string literal. 046 */ 047 public static final String JNDI_CONTEXT_NAME = "java:comp/env/log4j/context-name"; 048 049 /** 050 * Line separator. 051 */ 052 public static final String LINE_SEPARATOR = PropertiesUtil.getProperties().getStringProperty("line.separator", 053 "\n"); 054 055 /** 056 * Number of milliseconds in a second. 057 */ 058 public static final int MILLIS_IN_SECONDS = 1000; 059 060 /** 061 * Equivalent to StandardCharsets.UTF_8. 062 * 063 * @deprecated Use {@link StandardCharsets#UTF_8}. Will be removed in 2.5. 064 */ 065 @Deprecated 066 public static final Charset UTF_8 = StandardCharsets.UTF_8; 067 068 /** 069 * Supports user request LOG4J2-898 to have the option to format a message in the background thread. 070 */ 071 public static final boolean FORMAT_MESSAGES_IN_BACKGROUND = PropertiesUtil.getProperties().getBooleanProperty( 072 "log4j.format.msg.async", false); 073 074 /** 075 * Prevent class instantiation. 076 */ 077 private Constants() { 078 } 079}