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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  
18  package org.apache.logging.log4j.core;
19  
20  /**
21   *
22   */
23  public interface LifeCycle {
24      
25      /**
26       * Status of a life cycle like a {@link LoggerContext}..
27       */
28      public enum State {
29          /** Initialized but not yet started. */
30          INITIALIZED,
31          /** In the process of starting. */
32          STARTING,
33          /** Has started. */
34          STARTED,
35          /** Stopping is in progress. */
36          STOPPING,
37          /** Has stopped. */
38          STOPPED
39      }
40      
41      void start();
42  
43      void stop();
44  
45      boolean isStarted();
46  
47      boolean isStopped();
48  }