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// 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).
//
// This file implements the "bridge" between Java and C++ and enables
// calling c++ ROCKSDB_NAMESPACE::Statistics methods from Java side.
#include <jni.h>
#include <memory>
#include <set>
#include "include/org_rocksdb_Statistics.h"
#include "rocksdb/statistics.h"
#include "rocksjni/portal.h"
#include "rocksjni/statisticsjni.h"
/*
* Class: org_rocksdb_Statistics
* Method: newStatistics
* Signature: ()J
*/
jlong Java_org_rocksdb_Statistics_newStatistics__(
JNIEnv* env, jclass jcls) {
return Java_org_rocksdb_Statistics_newStatistics___3BJ(
env, jcls, nullptr, 0);
}
/*
* Class: org_rocksdb_Statistics
* Method: newStatistics
* Signature: (J)J
*/
jlong Java_org_rocksdb_Statistics_newStatistics__J(
JNIEnv* env, jclass jcls, jlong jother_statistics_handle) {
return Java_org_rocksdb_Statistics_newStatistics___3BJ(
env, jcls, nullptr, jother_statistics_handle);
}
/*
* Class: org_rocksdb_Statistics
* Method: newStatistics
* Signature: ([B)J
*/
jlong Java_org_rocksdb_Statistics_newStatistics___3B(
JNIEnv* env, jclass jcls, jbyteArray jhistograms) {
return Java_org_rocksdb_Statistics_newStatistics___3BJ(
env, jcls, jhistograms, 0);
}
/*
* Class: org_rocksdb_Statistics
* Method: newStatistics
* Signature: ([BJ)J
*/
jlong Java_org_rocksdb_Statistics_newStatistics___3BJ(
JNIEnv* env, jclass, jbyteArray jhistograms, jlong jother_statistics_handle) {
std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>* pSptr_other_statistics =
nullptr;
if (jother_statistics_handle > 0) {
pSptr_other_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jother_statistics_handle);
}
std::set<uint32_t> histograms;
if (jhistograms != nullptr) {
const jsize len = env->GetArrayLength(jhistograms);
if (len > 0) {
jbyte* jhistogram = env->GetByteArrayElements(jhistograms, nullptr);
if (jhistogram == nullptr) {
// exception thrown: OutOfMemoryError
return 0;
}
for (jsize i = 0; i < len; i++) {
const ROCKSDB_NAMESPACE::Histograms histogram =
ROCKSDB_NAMESPACE::HistogramTypeJni::toCppHistograms(jhistogram[i]);
histograms.emplace(histogram);
}
env->ReleaseByteArrayElements(jhistograms, jhistogram, JNI_ABORT);
}
}
std::shared_ptr<ROCKSDB_NAMESPACE::Statistics> sptr_other_statistics =
nullptr;
if (pSptr_other_statistics != nullptr) {
sptr_other_statistics = *pSptr_other_statistics;
}
auto* pSptr_statistics =
new std::shared_ptr<ROCKSDB_NAMESPACE::StatisticsJni>(
new ROCKSDB_NAMESPACE::StatisticsJni(sptr_other_statistics,
histograms));
return reinterpret_cast<jlong>(pSptr_statistics);
}
/*
* Class: org_rocksdb_Statistics
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_Statistics_disposeInternal(
JNIEnv*, jobject, jlong jhandle) {
if (jhandle > 0) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
delete pSptr_statistics;
}
}
/*
* Class: org_rocksdb_Statistics
* Method: statsLevel
* Signature: (J)B
*/
jbyte Java_org_rocksdb_Statistics_statsLevel(
JNIEnv*, jobject, jlong jhandle) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
return ROCKSDB_NAMESPACE::StatsLevelJni::toJavaStatsLevel(
pSptr_statistics->get()->get_stats_level());
}
/*
* Class: org_rocksdb_Statistics
* Method: setStatsLevel
* Signature: (JB)V
*/
void Java_org_rocksdb_Statistics_setStatsLevel(
JNIEnv*, jobject, jlong jhandle, jbyte jstats_level) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
auto stats_level =
ROCKSDB_NAMESPACE::StatsLevelJni::toCppStatsLevel(jstats_level);
pSptr_statistics->get()->set_stats_level(stats_level);
}
/*
* Class: org_rocksdb_Statistics
* Method: getTickerCount
* Signature: (JB)J
*/
jlong Java_org_rocksdb_Statistics_getTickerCount(
JNIEnv*, jobject, jlong jhandle, jbyte jticker_type) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
auto ticker = ROCKSDB_NAMESPACE::TickerTypeJni::toCppTickers(jticker_type);
uint64_t count = pSptr_statistics->get()->getTickerCount(ticker);
return static_cast<jlong>(count);
}
/*
* Class: org_rocksdb_Statistics
* Method: getAndResetTickerCount
* Signature: (JB)J
*/
jlong Java_org_rocksdb_Statistics_getAndResetTickerCount(
JNIEnv*, jobject, jlong jhandle, jbyte jticker_type) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
auto ticker = ROCKSDB_NAMESPACE::TickerTypeJni::toCppTickers(jticker_type);
return pSptr_statistics->get()->getAndResetTickerCount(ticker);
}
/*
* Class: org_rocksdb_Statistics
* Method: getHistogramData
* Signature: (JB)Lorg/rocksdb/HistogramData;
*/
jobject Java_org_rocksdb_Statistics_getHistogramData(
JNIEnv* env, jobject, jlong jhandle, jbyte jhistogram_type) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
// TODO(AR) perhaps better to construct a Java Object Wrapper that
// uses ptr to C++ `new HistogramData`
ROCKSDB_NAMESPACE::HistogramData data;
auto histogram =
ROCKSDB_NAMESPACE::HistogramTypeJni::toCppHistograms(jhistogram_type);
pSptr_statistics->get()->histogramData(
static_cast<ROCKSDB_NAMESPACE::Histograms>(histogram), &data);
jclass jclazz = ROCKSDB_NAMESPACE::HistogramDataJni::getJClass(env);
if (jclazz == nullptr) {
// exception occurred accessing class
return nullptr;
}
jmethodID mid =
ROCKSDB_NAMESPACE::HistogramDataJni::getConstructorMethodId(env);
if (mid == nullptr) {
// exception occurred accessing method
return nullptr;
}
return env->NewObject(jclazz, mid, data.median, data.percentile95,
data.percentile99, data.average,
data.standard_deviation, data.max, data.count,
data.sum, data.min);
}
/*
* Class: org_rocksdb_Statistics
* Method: getHistogramString
* Signature: (JB)Ljava/lang/String;
*/
jstring Java_org_rocksdb_Statistics_getHistogramString(
JNIEnv* env, jobject, jlong jhandle, jbyte jhistogram_type) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
auto histogram =
ROCKSDB_NAMESPACE::HistogramTypeJni::toCppHistograms(jhistogram_type);
auto str = pSptr_statistics->get()->getHistogramString(histogram);
return env->NewStringUTF(str.c_str());
}
/*
* Class: org_rocksdb_Statistics
* Method: reset
* Signature: (J)V
*/
void Java_org_rocksdb_Statistics_reset(
JNIEnv* env, jobject, jlong jhandle) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
ROCKSDB_NAMESPACE::Status s = pSptr_statistics->get()->Reset();
if (!s.ok()) {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, s);
}
}
/*
* Class: org_rocksdb_Statistics
* Method: toString
* Signature: (J)Ljava/lang/String;
*/
jstring Java_org_rocksdb_Statistics_toString(
JNIEnv* env, jobject, jlong jhandle) {
auto* pSptr_statistics =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::Statistics>*>(
jhandle);
assert(pSptr_statistics != nullptr);
auto str = pSptr_statistics->get()->ToString();
return env->NewStringUTF(str.c_str());
}
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