Java tutorial
/* * 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.slider.server.services.workflow; import org.apache.hadoop.service.Service; import java.util.List; /** * Interface for accessing services that contain one or more child * services. */ public interface ServiceParent extends Service { /** * Add a child service. It must be in a consistent state with the * service to which it is being added. * @param service the service to add. */ void addService(Service service); /** * Get an unmodifiable list of services * @return a list of child services at the time of invocation - * added services will not be picked up. */ List<Service> getServices(); }