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.util; 18 19 import java.nio.charset.Charset; 20 import java.nio.charset.StandardCharsets; 21 22 import org.apache.logging.log4j.util.PropertiesUtil; 23 24 /** 25 * Log4j Constants. 26 */ 27 public final class Constants { 28 29 /** 30 * Name of the system property to use to identify the LogEvent factory. 31 */ 32 public static final String LOG4J_LOG_EVENT_FACTORY = "Log4jLogEventFactory"; 33 34 /** 35 * Name of the system property to use to identify the ContextSelector Class. 36 */ 37 public static final String LOG4J_CONTEXT_SELECTOR = "Log4jContextSelector"; 38 39 /** 40 * Property name for the default status (internal log4j logging) level to use if not specified in configuration. 41 */ 42 public static final String LOG4J_DEFAULT_STATUS_LEVEL = "Log4jDefaultStatusLevel"; 43 44 /** 45 * JNDI context name string literal. 46 */ 47 public static final String JNDI_CONTEXT_NAME = "java:comp/env/log4j/context-name"; 48 49 /** 50 * Line separator. 51 */ 52 public static final String LINE_SEPARATOR = PropertiesUtil.getProperties().getStringProperty("line.separator", 53 "\n"); 54 55 /** 56 * Number of milliseconds in a second. 57 */ 58 public static final int MILLIS_IN_SECONDS = 1000; 59 60 /** 61 * Equivalent to StandardCharsets.UTF_8. 62 * 63 * @deprecated Use {@link StandardCharsets#UTF_8}. Will be removed in 2.5. 64 */ 65 @Deprecated 66 public static final Charset UTF_8 = StandardCharsets.UTF_8; 67 68 /** 69 * Supports user request LOG4J2-898 to have the option to format a message in the background thread. 70 */ 71 public static final boolean FORMAT_MESSAGES_IN_BACKGROUND = PropertiesUtil.getProperties().getBooleanProperty( 72 "log4j.format.msg.async", false); 73 74 /** 75 * Prevent class instantiation. 76 */ 77 private Constants() { 78 } 79 }