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.yarn;
  
  import com.tencent.angel.common.Id;
  import com.tencent.angel.master.deploy.ContainerAllocatorEventType;
  import org.apache.hadoop.yarn.api.records.Priority;
  import org.apache.hadoop.yarn.api.records.Resource;
  
  import java.util.Arrays;
  
  /**
   * Request a container event. It contains resource context.
   */
  public class YarnContainerRequestEvent extends YarnContainerAllocatorEvent {
    /**
     * container resource quota
     */
    private final Resource resource;
  
    /**
     * the expected host addresses, it used to local calculation
     */
    private final String[] hosts;
  
    /**
     * Create a YarnContainerRequestEvent
     *
     * @param id       task id
     * @param resouce  container resource quota
     * @param priority resource priority
     */
    public YarnContainerRequestEvent(Id id, Resource resouce, Priority priority) {
      this(id, resouce, priority, null);
    }
  
    /**
     * Create a YarnContainerRequestEvent
     *
     * @param id       task id
     * @param resouce  container resource quota
     * @param priority resource priority
     * @param hosts    the expected host addresses
     */
    public YarnContainerRequestEvent(Id id, Resource resouce, Priority priority, String[] hosts) {
      super(id, ContainerAllocatorEventType.CONTAINER_REQ, priority);
      this.resource = resouce;
      this.hosts = hosts;
    }
  
    /**
     * Get container resource quota
     *
     * @return container resource quota
     */
    public Resource getResource() {
      return resource;
    }
  
    /**
     * Get the expected host addresses
     *
     * @return the expected host addresses
     */
    public String[] getHosts() {
      return hosts;
    }
  
    @Override public String toString() {
      return "YarnContainerRequestEvent [resource=" + resource + ", hosts=" + Arrays.toString(hosts)
        + ", toString()=" + super.toString() + "]";
    }
  }
  