1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.conf;
20
21 import org.apache.hadoop.hbase.classification.InterfaceAudience;
22
23 /**
24 * This extension to ConfigurationObserver allows the configuration to propagate to the children of
25 * the current {@link ConfigurationObserver}. This is the preferred way to make a class online
26 * configurable because it allows the user to configure the children in a recursive manner
27 * automatically.
28 */
29 @InterfaceAudience.Private
30 public interface PropagatingConfigurationObserver extends ConfigurationObserver {
31
32 /**
33 * Needs to be called to register the children to the manager.
34 * @param manager : to register to
35 */
36 void registerChildren(ConfigurationManager manager);
37
38 /**
39 * Needs to be called to deregister the children from the manager.
40 * @param manager : to deregister from
41 */
42 void deregisterChildren(ConfigurationManager manager);
43 }