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    
018    package org.apache.logging.log4j.core;
019    
020    /**
021     *
022     */
023    public interface LifeCycle {
024        
025        /**
026         * Status of a life cycle like a {@link LoggerContext}..
027         */
028        public enum State {
029            /** Initialized but not yet started. */
030            INITIALIZED,
031            /** In the process of starting. */
032            STARTING,
033            /** Has started. */
034            STARTED,
035            /** Stopping is in progress. */
036            STOPPING,
037            /** Has stopped. */
038            STOPPED
039        }
040        
041        void start();
042    
043        void stop();
044    
045        boolean isStarted();
046    
047        boolean isStopped();
048    }