
package org.apache.geode.internal.admin.remote;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.geode.DataSerializable;
import org.apache.geode.cache.CacheStatistics;

/**
 * This class represents a snapshot of a {@link org.apache.geode.cache.CacheStatistics} from a
 * remote vm
 */
public class RemoteCacheStatistics implements CacheStatistics, DataSerializable {
  private static final long serialVersionUID = 53585856563375154L;
  private long lastModified;
  private long lastAccessed;
  private long hitCount;
  private long missCount;
  private float hitRatio;

  public RemoteCacheStatistics(CacheStatistics stats) {
    this.lastModified = stats.getLastModifiedTime();
    this.lastAccessed = stats.getLastAccessedTime();
    this.hitCount = stats.getHitCount();
    this.missCount = stats.getMissCount();
    this.hitRatio = stats.getHitRatio();
  }

  /**
   * For use only by DataExternalizable mechanism
   */
  public RemoteCacheStatistics() {}

  public long getLastModifiedTime() {
    return lastModified;
  }

  public long getLastAccessedTime() {
    return lastAccessed;
  }

  public long getHitCount() {
    return hitCount;
  }

  public long getMissCount() {
    return missCount;
  }

  public float getHitRatio() {
    return hitRatio;
  }

  public void resetCounts() {
    throw new UnsupportedOperationException();
  }

  public void toData(DataOutput out) throws IOException {
    out.writeLong(lastModified);
    out.writeLong(lastAccessed);
    out.writeLong(hitCount);
    out.writeLong(missCount);
    out.writeFloat(hitRatio);
  }

  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    lastModified = in.readLong();
    lastAccessed = in.readLong();
    hitCount = in.readLong();
    missCount = in.readLong();
    hitRatio = in.readFloat();
  }
}
