Package com.facebook.LinkBench.distributions

Examples of com.facebook.LinkBench.distributions.ZipfDistribution$CacheEntry

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    return 5;
  }

  @Override
  public ProbabilityDistribution getDist() {
    return new ZipfDistribution();
  }
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    testSanityAccessDist(shuffled, min, max);
  }

  @Test
  public void testZipf() {
    ZipfDistribution z = new ZipfDistribution();
    Properties props = new Properties();
    props.setProperty("shape", "0.5");
    int min = 100, max = 200;
    z.init(min, max, props, "");
    ProbAccessDistribution unshuffled = new ProbAccessDistribution(z, null);
    testSanityAccessDist(unshuffled, min, max);

    ProbAccessDistribution shuffled = new ProbAccessDistribution(z,
                        new InvertibleShuffler(13, 25, max - min));
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*/
public class LeastRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {

    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (lruCacheEntry == null) {
                lruCacheEntry = cacheEntry;
            } else if (lruCacheEntry.getLastAccessed() > cacheEntry.getLastAccessed()) {
                lruCacheEntry = cacheEntry;
            }
        }
        if (lruCacheEntry != null) {
            cache.evict(lruCacheEntry.getKey());
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*/
public class MostRecentlyUsedEvictionAlgorithm implements EvictionAlgorithm {

    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry mruCacheEntry = null;
        for (Object o : cache.getAll()) {
            CacheEntry cacheEntry = (CacheEntry) o;
            if (mruCacheEntry == null) {
                mruCacheEntry = cacheEntry;
            } else if (mruCacheEntry.getLastAccessed() < cacheEntry.getLastAccessed()) {
                mruCacheEntry = cacheEntry;
            }
        }
        if (mruCacheEntry != null) {
            cache.evict(mruCacheEntry.getKey());
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public class RandomEvictionAlgorithm implements EvictionAlgorithm {
    private static Random random = new Random();

    @SuppressWarnings("unchecked")
    public void evict(CacheImpl cache) {
        CacheEntry lruCacheEntry = null;
        Collection all = cache.getAll();
        int evictionIndex = random.nextInt(all.size());
        int index = 0;

        for (Object anAll : all) {
            CacheEntry cacheEntry = (CacheEntry) anAll;
            if (index == evictionIndex) {
                lruCacheEntry = cacheEntry;
                break;
            }
            index++;
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