ceph/src/rocksdb/java/src/main/java/org/rocksdb/StatisticsCollectorCallback.java

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 package org.rocksdb;
   7
   8 /**
   9  * Callback interface provided to StatisticsCollector.
  10  *
  11  * Thread safety:
  12  * StatisticsCollector doesn't make any guarantees about thread safety.
  13  * If the same reference of StatisticsCollectorCallback is passed to multiple
  14  * StatisticsCollector references, then its the responsibility of the
  15  * user to make StatisticsCollectorCallback's implementation thread-safe.
  16  *
  17  */
  18 public interface StatisticsCollectorCallback {
  19   /**
  20    * Callback function to get ticker values.
  21    * @param tickerType Ticker type.
  22    * @param tickerCount Value of ticker type.
  23   */
  24   void tickerCallback(TickerType tickerType, long tickerCount);
  25
  26   /**
  27    * Callback function to get histogram values.
  28    * @param histType Histogram type.
  29    * @param histData Histogram data.
  30   */
  31   void histogramCallback(HistogramType histType, HistogramData histData);
  32 }