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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. 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
 *
 * 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. See accompanying
 * LICENSE file.
 */
/**
 * File comment
 */
package com.gemstone.gemfire.internal.cache.xmlcache;

import java.util.Set;

import com.gemstone.gemfire.cache.control.RebalanceFactory;
import com.gemstone.gemfire.cache.control.RebalanceOperation;
import com.gemstone.gemfire.cache.control.ResourceManager;
import com.gemstone.gemfire.internal.cache.control.MemoryThresholds;

/**
 * @author Mitch Thomas
 * @since 6.0
 */
public class ResourceManagerCreation implements ResourceManager {

  private volatile float criticalHeapPercentage;
  private boolean criticalHeapSet = false;

  private volatile float evictionHeapPercentage;
  private boolean evictionHeapSet = false;
  
  private volatile float criticalOffHeapPercentage;
  private boolean criticalOffHeapSet = false;

  private volatile float evictionOffHeapPercentage;
  private boolean evictionOffHeapSet = false;

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#createRebalanceFactory()
   */
  public RebalanceFactory createRebalanceFactory() {
    throw new IllegalArgumentException("Unused");
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#getRebalanceOperations()
   */
  public Set getRebalanceOperations() {
    throw new IllegalArgumentException("Unused");
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#getCriticalHeapPercentage()
   */
  public float getCriticalHeapPercentage() {
    return this.criticalHeapPercentage;
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#setCriticalHeapPercentage(int)
   */
  public void setCriticalHeapPercentage(float heapPercentage) {
    this.criticalHeapSet = true;
    this.criticalHeapPercentage = heapPercentage;
  }
  
  public void setCriticalHeapPercentageToDefault() {
    this.criticalHeapPercentage = MemoryThresholds.DEFAULT_CRITICAL_PERCENTAGE;
  }

  /**
   * Determine if the critical heap was configured
   * @return true if it was configured
   */
  public boolean hasCriticalHeap() {
    return this.criticalHeapSet;
  }
  
  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#getCriticalOffHeapPercentage()
   */
  @Override
  public float getCriticalOffHeapPercentage() {
    return this.criticalOffHeapPercentage;
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#setCriticalOffHeapPercentage(int)
   */
  @Override
  public void setCriticalOffHeapPercentage(final float offHeapPercentage) {
    this.criticalOffHeapSet = true;
    this.criticalOffHeapPercentage = offHeapPercentage;
  }
  
  public void setCriticalOffHeapPercentageToDefault() {
    this.criticalOffHeapPercentage = MemoryThresholds.DEFAULT_CRITICAL_PERCENTAGE;
  }

  /**
   * Determine if the critical off-heap was configured
   * @return true if it was configured
   */
  public boolean hasCriticalOffHeap() {
    return this.criticalOffHeapSet;
  }

  public void configure(ResourceManager r) {
    if (hasCriticalHeap()) {
      r.setCriticalHeapPercentage(this.criticalHeapPercentage);
    }
    if (hasCriticalOffHeap()) {
      r.setCriticalOffHeapPercentage(this.criticalOffHeapPercentage);
    }
    if (hasEvictionHeap()) {
      r.setEvictionHeapPercentage(this.evictionHeapPercentage);
    }
    if (hasEvictionOffHeap()) {
      r.setEvictionOffHeapPercentage(this.evictionOffHeapPercentage);
    }
  }

  /**
   * @param other the other ResourceManager with which to compare 
   */
  public void sameAs(ResourceManager other) {
    if (getCriticalHeapPercentage() != other.getCriticalHeapPercentage()) {
      throw new RuntimeException("Resource Manager critical heap percentages differ: "
          + getCriticalHeapPercentage() + " != " + other.getCriticalHeapPercentage());
    }
    if (getCriticalOffHeapPercentage() != other.getCriticalOffHeapPercentage()) {
      throw new RuntimeException("Resource Manager critical off-heap percentages differ: "
          + getCriticalOffHeapPercentage() + " != " + other.getCriticalOffHeapPercentage());
    }
    if (hasEvictionHeap()) {
      // If we don't have it set don't compare since other may have been set to
      // a smart default.
      if (getEvictionHeapPercentage() != other.getEvictionHeapPercentage()) {
        throw new RuntimeException("Resource Manager eviction heap percentages differ: "
                                   + getEvictionHeapPercentage() + " != " + other.getEvictionHeapPercentage());
      }
    }
    if (hasEvictionOffHeap()) {
      // If we don't have it set don't compare since other may have been set to
      // a smart default.
      if (getEvictionOffHeapPercentage() != other.getEvictionOffHeapPercentage()) {
        throw new RuntimeException("Resource Manager eviction off-heap percentages differ: "
                                   + getEvictionOffHeapPercentage() + " != " + other.getEvictionOffHeapPercentage());
      }
    }
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#getEvictionHeapPercentage()
   */
  public float getEvictionHeapPercentage() {
    return this.evictionHeapPercentage;
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#setEvictionHeapPercentage(int)
   */
  public void setEvictionHeapPercentage(float heapPercentage) {
    this.evictionHeapSet = true;
    this.evictionHeapPercentage = heapPercentage;
  }
  
  public void setEvictionHeapPercentageToDefault() {
    this.evictionHeapPercentage = MemoryThresholds.DEFAULT_EVICTION_PERCENTAGE;
  }
  
  /**
   * Determine if the eviction heap was configured
   * @return true if the eviction heap was configured
   */
  public boolean hasEvictionHeap() {
    return this.evictionHeapSet;
  }
  
  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#getEvictionOffHeapPercentage()
   */
  public float getEvictionOffHeapPercentage() {
    return this.evictionOffHeapPercentage;
  }

  /* (non-Javadoc)
   * @see com.gemstone.gemfire.cache.control.ResourceManager#setEvictionOffHeapPercentage(int)
   */
  public void setEvictionOffHeapPercentage(final float offHeapPercentage) {
    this.evictionOffHeapSet = true;
    this.evictionOffHeapPercentage = offHeapPercentage;
  }
  
  public void setEvictionOffHeapPercentageToDefault() {
    this.evictionOffHeapPercentage = MemoryThresholds.DEFAULT_EVICTION_PERCENTAGE;
  }
  
  /**
   * Determine if the eviction off-heap was configured
   * @return true if the eviction off-heap was configured
   */
  public boolean hasEvictionOffHeap() {
    return this.evictionOffHeapSet;
  }
}