CacheabilityMetrics.java

package br.ufrgs.inf.prosoft.aplcachetf.extension.metrics;

import br.ufrgs.inf.prosoft.aplcachetf.extension.metadata.GroupOfOccurrences;

public class CacheabilityMetrics {

  public static int K_STANDARD_DEVIATION = 0;

  public static boolean isStaticData(GroupOfOccurrences groupOfOccurrences) {
    if (groupOfOccurrences.getMetrics().getNormalisedMinEuclideanDistance().compareTo(Thresholds.distanceThreshold(K_STANDARD_DEVIATION)) > 0) return false;
    return groupOfOccurrences.getMetrics().getHitRatio() == 100.0;
  }

  public static boolean isNotStaticData(GroupOfOccurrences groupOfOccurrences) {
    return !isStaticData(groupOfOccurrences);
  }

  public static boolean isChangeable(GroupOfOccurrences groupOfOccurrences) {
    return groupOfOccurrences.getMetrics().getMissRatio() > Thresholds.missThreshold(K_STANDARD_DEVIATION);
  }

  public static boolean hasHighSavedTimeAndLowIdleTime(GroupOfOccurrences groupOfOccurrences) {
    return groupOfOccurrences.getMetrics().getNormalisedMinEuclideanDistance().compareTo(Thresholds.distanceThreshold(K_STANDARD_DEVIATION)) <= 0;
  }

  public static boolean hasLowSavedTimeAndHighIdleTime(GroupOfOccurrences groupOfOccurrences) {
    return !hasHighSavedTimeAndLowIdleTime(groupOfOccurrences);
  }

  public static boolean isUserSpecific(GroupOfOccurrences groupOfOccurrences) {
    if (groupOfOccurrences.getMetrics().getShareableReuses() == 0) return false;
    return groupOfOccurrences.getMetrics().getShareability() < Thresholds.shareabilityThreshold(K_STANDARD_DEVIATION);
  }

  public static boolean isExpensive(GroupOfOccurrences groupOfOccurrences) {
    return groupOfOccurrences.getMetrics().getAverageReusableExecutionTime() >= Thresholds.expensivenessThreshold(K_STANDARD_DEVIATION);
  }

  public static boolean isCheap(GroupOfOccurrences groupOfOccurrences) {
    return !isExpensive(groupOfOccurrences);
  }
}