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.log4j.chainsaw;
18
19 import java.util.EventListener;
20
21 /**
22 * Chainsaw notifies these Listeners when the user has requested
23 * it to shutdown.
24 * <p>
25 * Listeners should use this opportunity to release any resources
26 * and/or perform any clean up activity.
27 * <p>
28 * Listeners should <B>NOT</b> perform the action of actual shutting down
29 * however (i.e. do not call System.exit()).
30 *
31 * @author Paul Smith <psmith@apache.org>
32 * @see LogUI#setShutdownAction(Action)
33 */
34 public interface ShutdownListener extends EventListener {
35
36 void shuttingDown();
37 }