hadoop AddingCompositeService 源码
haddop AddingCompositeService 代码
文件路径：/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/AddingCompositeService.java
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.registry.server.services;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.service.CompositeService;
import org.apache.hadoop.service.Service;
/**
* Composite service that exports the add/remove methods.
* <p>
* This allows external classes to add services to these methods, after which
* they follow the same lifecyce.
* <p>
* It is essential that any service added is in a state where it can be moved
* on with that of the parent services. Specifically, do not add an uninited
* service to a parent that is already inited —as the <code>start</code>
* operation will then fail
*
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class AddingCompositeService extends CompositeService {
public AddingCompositeService(String name) {
super(name);
}
@Override
public void addService(Service service) {
super.addService(service);
}
@Override
public boolean removeService(Service service) {
return super.removeService(service);
}
}
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