/**
 * 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.yarn.server.resourcemanager.scheduler.fair;

import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.util.Records;
import org.apache.hadoop.yarn.util.resource.Resources;

/**
 * Dummy implementation of Schedulable for unit testing.
 */
public class FakeSchedulable implements Schedulable {
  private Resource usage;
  private final Resource demand;
  private final Resource minShare;
  private final Resource maxShare;
  private float weights;
  private final Priority priority;
  private Resource fairShare;
  private long startTime;
  
  public FakeSchedulable() {
    this(0, Integer.MAX_VALUE, 1, 0, 0, 0);
  }
  
  public FakeSchedulable(int minShare) {
    this(minShare, Integer.MAX_VALUE, 1, 0, 0, 0);
  }
  
  public FakeSchedulable(int minShare, int maxShare) {
    this(minShare, maxShare, 1, 0, 0, 0);
  }
  
  public FakeSchedulable(int minShare, float memoryWeight) {
    this(minShare, Integer.MAX_VALUE, memoryWeight, 0, 0, 0);
  }
  
  public FakeSchedulable(int minShare, int maxShare, float memoryWeight) {
    this(minShare, maxShare, memoryWeight, 0, 0, 0);
  }
  
  public FakeSchedulable(int minShare, int maxShare, float weight,
      int fairShare, int usage, long startTime) {
    this(Resources.createResource(minShare, 0),
        Resources.createResource(maxShare, 0),
        weight, Resources.createResource(fairShare, 0),
        Resources.createResource(usage, 0), startTime);
  }
  
  public FakeSchedulable(Resource minShare, float weights) {
    this(minShare,
        Resources.createResource(Integer.MAX_VALUE, Integer.MAX_VALUE),
        weights, Resources.createResource(0, 0),
        Resources.createResource(0, 0), 0);
  }

  public FakeSchedulable(long minShare, long maxShare) {
    this(minShare, maxShare, 1L);
  }

  public FakeSchedulable(long minShare, long maxShare, float weights) {
    this(Resources.createResource(minShare, 0),
        Resources.createResource(maxShare, 0),
        weights, Resources.createResource(0, 0),
        Resources.createResource(0, 0), 0);
  }

  public FakeSchedulable(Resource minShare, Resource maxShare,
      float weight, Resource fairShare, Resource usage, long startTime) {
    this.minShare = minShare;
    this.maxShare = maxShare;
    this.weights = weight;
    this.usage = usage;
    this.demand = Resources.multiply(usage, 2.0);
    this.priority = Records.newRecord(Priority.class);
    setFairShare(fairShare);
    start(startTime);
  }
  
  @Override
  public Resource assignContainer(FSSchedulerNode node) {
    return null;
  }

  @Override
  public Resource getFairShare() {
    return this.fairShare;
  }

  @Override
  public final void setFairShare(Resource fairShare) {
    this.fairShare = fairShare;
  }

  @Override
  public Resource getDemand() {
    return demand;
  }

  @Override
  public String getName() {
    return "FakeSchedulable" + this.hashCode();
  }

  @Override
  public Priority getPriority() {
    return priority;
  }

  @Override
  public Resource getResourceUsage() {
    return usage;
  }

  @Override
  public long getStartTime() {
    return startTime;
  }
  
  @Override
  public float getWeight() {
    return weights;
  }
  
  @Override
  public Resource getMinShare() {
    return minShare;
  }
  
  @Override
  public Resource getMaxShare() {
    return maxShare;
  }

  @Override
  public void updateDemand() {}

  @Override
  public boolean isPreemptable() {
    return true;
  }

  public void setResourceUsage(Resource resourceUsage) {
    this.usage = resourceUsage;
  }

  public final void start(long time) {
    startTime = time;
  }
}