rocksdb/java/rocksjni/statistics.cc

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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// This file implements the "bridge" between Java and C++ and enables
// calling c++ rocksdb::Statistics methods from Java side.
#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include "include/org_rocksdb_Statistics.h"
#include "rocksjni/portal.h"
#include "rocksdb/statistics.h"
/*
* Class: org_rocksdb_Statistics
* Method: getTickerCount0
* Signature: (IJ)J
*/
jlong Java_org_rocksdb_Statistics_getTickerCount0(
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JNIEnv* env, jobject jobj, int tickerType, jlong handle) {
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auto st = reinterpret_cast<rocksdb::Statistics*>(handle);
assert(st != nullptr);
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return st->getTickerCount(static_cast<rocksdb::Tickers>(tickerType));
}
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/*
* Class: org_rocksdb_Statistics
* Method: geHistogramData0
* Signature: (IJ)Lorg/rocksdb/HistogramData;
*/
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jobject Java_org_rocksdb_Statistics_geHistogramData0(
JNIEnv* env, jobject jobj, int histogramType, jlong handle) {
auto st = reinterpret_cast<rocksdb::Statistics*>(handle);
assert(st != nullptr);
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rocksdb::HistogramData data;
st->histogramData(static_cast<rocksdb::Histograms>(histogramType),
&data);
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// Don't reuse class pointer
jclass jclazz = env->FindClass("org/rocksdb/HistogramData");
jmethodID mid = rocksdb::HistogramDataJni::getConstructorMethodId(
env, jclazz);
return env->NewObject(jclazz, mid, data.median, data.percentile95,
data.percentile99, data.average, data.standard_deviation);
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}