How to use

fetch

method

in

com.yahoo.concurrent.ThreadLocalDirectory

private Bucket updateBuffer() {
  List<Bucket> buckets = metricsCollection.fetch();
  final long toMillis = System.currentTimeMillis();
  final int bucketIndex = generation++ % buffer.length;
  Bucket bucketToDelete = buffer[bucketIndex];
  Bucket latest = new Bucket(fromMillis, toMillis);
  for (Bucket b : buckets) {
    latest.merge(b, true);
  }
  buffer[bucketIndex] = latest;
  this.fromMillis = toMillis;
  return bucketToDelete;
}

/** gathers all data since last snapshot */
public Bucket getSnapshot() {
  final Bucket merged = new Bucket();
  for (Bucket b : collection.fetch()) {
    merged.merge(b, true);
  }
  return merged;
}
/** utility method for testing */

  @Override
  public void run(Handle h, boolean firstRun) {
    List<Deque<QueryRatePerSecond>> data = directory.fetch();
    List<QueryRatePerSecond> chewed = merge(data);
    for (QueryRatePerSecond qps : chewed) {
      qpsStatistics.put((double) qps.howMany);
    }
  }
}

@Override
public Result search(Query query, Execution execution) {
  Result r;
  long when = query.getStartTime() / 1000L;
  Hit meta = null;
  directory.update(when);
  if (useMetaHit) {
    if (query.properties().getBoolean(propertyName, false)) {
      List<QueryRatePerSecond> l = merge(directory.fetch());
      Tuple2<Integer, Double> maxAndMean = maxAndMean(l);
      meta = new QpsHit(maxAndMean.first, maxAndMean.second);
    }
  }
  r = execution.search(query);
  if (meta != null) {
    r.hits().add(meta);
  }
  return r;
}