    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     */
    017    package org.apache.logging.log4j.core.util;
    018
    019    import org.apache.logging.log4j.util.PropertiesUtil;
    020
    021    import java.nio.charset.Charset;
    022
    023    /**
    024     * Log4j Constants.
    025     */
    026    public 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         * @ToDo - Initialize with StandardCharsets.UTF_8 when Java 7 is the minimum version.
    058         */
    059        public static final Charset UTF_8 = Charset.forName("UTF-8");
    060
    061        /**
    062         * Prevent class instantiation.
    063         */
    064        private Constants() {
    065        }
    066    }