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ebean core module

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package io.ebeaninternal.server.profile;

import io.ebean.metric.TimedMetricStats;

/**
 * Snapshot of the current statistics for a Counter or TimeCounter.
 */
final class DTimeMetricStats implements TimedMetricStats {

  private final boolean collected;
  private final long count;
  private final long total;
  private final long max;
  private String name;
  private String location;

  DTimeMetricStats(String name, boolean collected, long count, long total, long max) {
    this.name = name;
    this.collected = collected;
    this.count = count;
    this.total = total;
    // collection is racy so sanitize the max value if it has not been set
    // this most likely would happen when count = 1 so max = mean
    this.max = max != Long.MIN_VALUE ? max : (count < 1 ? 0 : Math.round(total / count));
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    if (name != null) {
      sb.append("name:").append(name).append(' ');
    }
    sb.append("count:").append(count)
      .append(" total:").append(total)
      .append(" max:").append(max);
    if (location != null) {
      sb.append(" loc:").append(location);
    }
    return sb.toString();
  }

  @Override
  public void setLocation(String location) {
    this.location = location;
  }

  @Override
  public boolean initialCollection() {
    return !collected;
  }

  @Override
  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String name() {
    return name;
  }

  @Override
  public String location() {
    return location;
  }

  /**
   * Return the count of values collected.
   */
  @Override
  public long count() {
    return count;
  }

  /**
   * Return the total of all the values.
   */
  @Override
  public long total() {
    return total;
  }

  /**
   * Return the Max value collected.
   */
  @Override
  public long max() {
    return max;
  }

  /**
   * Return the mean value rounded up.
   */
  @Override
  public long mean() {
    return (count < 1) ? 0L : Math.round((double)(total / count));
  }

}