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 org.apache.hadoop.yarn.api.records.Priority;
  import org.apache.hadoop.yarn.api.records.Resource;
  
  /**
   * Resource context for a Yarn container.
   */
  class ContainerRequest {
    /**
     * the task that asks for the container
     */
    final Id id;
  
    /**
     * container resource quota
     */
    final Resource capability;
  
    /**
     * the expected host addresses, it used to local calculation
     */
    final String[] hosts;
  
    /**
     * the rack addresses for the expected hosts
     */
    final String[] racks;
  
    /**
     * resource priority
     */
    final Priority priority;
  
    /**
     * Create a ContainerRequest
     *
     * @param id         the task that asks for the container
     * @param capability container resource quota
     * @param hosts      the expected host addresses
     * @param racks      the rack addresses for the expected hosts
     * @param priority   resource priority
     */
    public ContainerRequest(Id id, Resource capability, String[] hosts, String[] racks,
      Priority priority) {
      this.id = id;
      this.capability = capability;
      this.hosts = hosts;
      this.racks = racks;
      this.priority = priority;
    }
  
    /**
     * Create a ContainerRequest
     *
     * @param id         the task that asks for the container
     * @param capability container resource quota
     * @param priority   resource priority
     */
    public ContainerRequest(Id id, Resource capability, Priority priority) {
      this(id, capability, null, null, priority);
    }
  
    public String toString() {
      StringBuilder sb = new StringBuilder();
      sb.append("ID[").append(id).append("]");
      sb.append("Capability[").append(capability).append("]");
      sb.append("Priority[").append(priority).append("]");
      return sb.toString();
    }
  }
  