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

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 // This source code is licensed under the BSD-style license found in the
   3 // LICENSE file in the root directory of this source tree. An additional grant
   4 // of patent rights can be found in the PATENTS file in the same directory.
   5
   6 package org.rocksdb;
   7
   8 /**
   9  * Statistics to analyze the performance of a db. Pointer for statistics object
  10  * is managed by Options class.
  11  */
  12 public class Statistics {
  13
  14   private final long statsHandle_;
  15
  16   public Statistics(final long statsHandle) {
  17     statsHandle_ = statsHandle;
  18   }
  19
  20   public long getTickerCount(TickerType tickerType) {
  21     assert(isInitialized());
  22     return getTickerCount0(tickerType.getValue(), statsHandle_);
  23   }
  24
  25   public HistogramData getHistogramData(final HistogramType histogramType) {
  26     assert(isInitialized());
  27     return getHistogramData0(
  28         histogramType.getValue(), statsHandle_);
  29   }
  30
  31   private boolean isInitialized() {
  32     return (statsHandle_ != 0);
  33   }
  34
  35   private native long getTickerCount0(int tickerType, long handle);
  36   private native HistogramData getHistogramData0(int histogramType, long handle);
  37 }