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 org.apache.logging.log4j.util.PropertiesUtil;
020
021import java.nio.charset.Charset;
022
023/**
024 * Log4j Constants.
025 */
026public final class Constants {
027
028    /**
029     * Name of the system property to use to identify the LogEvent factory.
030     */
031    public static final String LOG4J_LOG_EVENT_FACTORY = "Log4jLogEventFactory";
032
033    /**
034     * Name of the system property to use to identify the ContextSelector Class.
035     */
036    public static final String LOG4J_CONTEXT_SELECTOR = "Log4jContextSelector";
037
038    public static final String LOG4J_DEFAULT_STATUS_LEVEL = "Log4jDefaultStatusLevel";
039
040    /**
041     * JNDI context name string literal.
042     */
043    public static final String JNDI_CONTEXT_NAME = "java:comp/env/log4j/context-name";
044
045    /**
046     * Line separator.
047     */
048    public static final String LINE_SEPARATOR = PropertiesUtil.getProperties().getStringProperty("line.separator", "\n");
049
050    /**
051     * Number of milliseconds in a second.
052     */
053    public static final int MILLIS_IN_SECONDS = 1000;
054    
055    /**
056     * Equivalent to StandardCharsets.UTF_8.
057     */
058    public static final Charset UTF_8 = Charset.forName("UTF-8");
059
060    /**
061     * Prevent class instantiation.
062     */
063    private Constants() {
064    }
065}