content: // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
  //  This source code is licensed under both the GPLv2 (found in the
  //  COPYING file in the root directory) and Apache 2.0 License
  //  (found in the LICENSE.Apache file in the root directory).
  
  package org.rocksdb;
  
  /**
   * Callback interface provided to StatisticsCollector.
   *
   * Thread safety:
   * StatisticsCollector doesn't make any guarantees about thread safety.
   * If the same reference of StatisticsCollectorCallback is passed to multiple
   * StatisticsCollector references, then its the responsibility of the
   * user to make StatisticsCollectorCallback's implementation thread-safe.
   *
   */
  public interface StatisticsCollectorCallback {
    /**
     * Callback function to get ticker values.
     * @param tickerType Ticker type.
     * @param tickerCount Value of ticker type.
    */
    void tickerCallback(TickerType tickerType, long tickerCount);
  
    /**
     * Callback function to get histogram values.
     * @param histType Histogram type.
     * @param histData Histogram data.
    */
    void histogramCallback(HistogramType histType, HistogramData histData);
  }
  