content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * Licensed 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
   *
   * https://opensource.org/licenses/Apache-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 com.tencent.angel.master.deploy;
  
  import org.apache.hadoop.service.AbstractService;
  import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
  import org.apache.hadoop.yarn.event.EventHandler;
  
  import java.util.Map;
  
  /**
   * Base class for container allocator.
   */
  public abstract class ContainerAllocator extends AbstractService
    implements EventHandler<ContainerAllocatorEvent> {
    public ContainerAllocator(String name) {
      super(name);
    }
  
    public boolean hasSuccessfullyUnregistered() {
      return false;
    }
  
    public Map<ApplicationAccessType, String> getApplicationACLs() {
      return null;
    }
  }
  