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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 callback "bridge" between Java and C++ for
// ROCKSDB_NAMESPACE::Logger.
#include "rocksjni/loggerjnicallback.h"
#include <cstdarg>
#include <cstdio>
#include "include/org_rocksdb_Logger.h"
#include "rocksjni/cplusplus_to_java_convert.h"
#include "rocksjni/portal.h"
namespace ROCKSDB_NAMESPACE {
LoggerJniCallback::LoggerJniCallback(JNIEnv* env, jobject jlogger)
: JniCallback(env, jlogger) {
m_jLogMethodId = LoggerJni::getLogMethodId(env);
if (m_jLogMethodId == nullptr) {
// exception thrown: NoSuchMethodException or OutOfMemoryError
return;
}
jobject jdebug_level = InfoLogLevelJni::DEBUG_LEVEL(env);
if (jdebug_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jdebug_level = env->NewGlobalRef(jdebug_level);
if (m_jdebug_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
jobject jinfo_level = InfoLogLevelJni::INFO_LEVEL(env);
if (jinfo_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jinfo_level = env->NewGlobalRef(jinfo_level);
if (m_jinfo_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
jobject jwarn_level = InfoLogLevelJni::WARN_LEVEL(env);
if (jwarn_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jwarn_level = env->NewGlobalRef(jwarn_level);
if (m_jwarn_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
jobject jerror_level = InfoLogLevelJni::ERROR_LEVEL(env);
if (jerror_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jerror_level = env->NewGlobalRef(jerror_level);
if (m_jerror_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
jobject jfatal_level = InfoLogLevelJni::FATAL_LEVEL(env);
if (jfatal_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jfatal_level = env->NewGlobalRef(jfatal_level);
if (m_jfatal_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
jobject jheader_level = InfoLogLevelJni::HEADER_LEVEL(env);
if (jheader_level == nullptr) {
// exception thrown: NoSuchFieldError, ExceptionInInitializerError
// or OutOfMemoryError
return;
}
m_jheader_level = env->NewGlobalRef(jheader_level);
if (m_jheader_level == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
}
void LoggerJniCallback::Logv(const char* /*format*/, va_list /*ap*/) {
// We implement this method because it is virtual but we don't
// use it because we need to know about the log level.
}
void LoggerJniCallback::Logv(const InfoLogLevel log_level, const char* format,
va_list ap) {
if (GetInfoLogLevel() <= log_level) {
// determine InfoLogLevel java enum instance
jobject jlog_level;
switch (log_level) {
case ROCKSDB_NAMESPACE::InfoLogLevel::DEBUG_LEVEL:
jlog_level = m_jdebug_level;
break;
case ROCKSDB_NAMESPACE::InfoLogLevel::INFO_LEVEL:
jlog_level = m_jinfo_level;
break;
case ROCKSDB_NAMESPACE::InfoLogLevel::WARN_LEVEL:
jlog_level = m_jwarn_level;
break;
case ROCKSDB_NAMESPACE::InfoLogLevel::ERROR_LEVEL:
jlog_level = m_jerror_level;
break;
case ROCKSDB_NAMESPACE::InfoLogLevel::FATAL_LEVEL:
jlog_level = m_jfatal_level;
break;
case ROCKSDB_NAMESPACE::InfoLogLevel::HEADER_LEVEL:
jlog_level = m_jheader_level;
break;
default:
jlog_level = m_jfatal_level;
break;
}
assert(format != nullptr);
const std::unique_ptr<char[]> msg = format_str(format, ap);
// pass msg to java callback handler
jboolean attached_thread = JNI_FALSE;
JNIEnv* env = getJniEnv(&attached_thread);
assert(env != nullptr);
jstring jmsg = env->NewStringUTF(msg.get());
if (jmsg == nullptr) {
// unable to construct string
if (env->ExceptionCheck()) {
env->ExceptionDescribe(); // print out exception to stderr
}
releaseJniEnv(attached_thread);
return;
}
if (env->ExceptionCheck()) {
// exception thrown: OutOfMemoryError
env->ExceptionDescribe(); // print out exception to stderr
env->DeleteLocalRef(jmsg);
releaseJniEnv(attached_thread);
return;
}
env->CallVoidMethod(m_jcallback_obj, m_jLogMethodId, jlog_level, jmsg);
if (env->ExceptionCheck()) {
// exception thrown
env->ExceptionDescribe(); // print out exception to stderr
env->DeleteLocalRef(jmsg);
releaseJniEnv(attached_thread);
return;
}
env->DeleteLocalRef(jmsg);
releaseJniEnv(attached_thread);
}
}
std::unique_ptr<char[]> LoggerJniCallback::format_str(const char* format,
va_list ap) const {
va_list ap_copy;
va_copy(ap_copy, ap);
const size_t required =
vsnprintf(nullptr, 0, format, ap_copy) + 1; // Extra space for '\0'
va_end(ap_copy);
std::unique_ptr<char[]> buf(new char[required]);
va_copy(ap_copy, ap);
vsnprintf(buf.get(), required, format, ap_copy);
va_end(ap_copy);
return buf;
}
LoggerJniCallback::~LoggerJniCallback() {
jboolean attached_thread = JNI_FALSE;
JNIEnv* env = getJniEnv(&attached_thread);
assert(env != nullptr);
if (m_jdebug_level != nullptr) {
env->DeleteGlobalRef(m_jdebug_level);
}
if (m_jinfo_level != nullptr) {
env->DeleteGlobalRef(m_jinfo_level);
}
if (m_jwarn_level != nullptr) {
env->DeleteGlobalRef(m_jwarn_level);
}
if (m_jerror_level != nullptr) {
env->DeleteGlobalRef(m_jerror_level);
}
if (m_jfatal_level != nullptr) {
env->DeleteGlobalRef(m_jfatal_level);
}
if (m_jheader_level != nullptr) {
env->DeleteGlobalRef(m_jheader_level);
}
releaseJniEnv(attached_thread);
}
} // namespace ROCKSDB_NAMESPACE
/*
* Class: org_rocksdb_Logger
* Method: createNewLoggerOptions
* Signature: (J)J
*/
jlong Java_org_rocksdb_Logger_createNewLoggerOptions(JNIEnv* env, jobject jobj,
jlong joptions) {
auto* sptr_logger = new std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>(
new ROCKSDB_NAMESPACE::LoggerJniCallback(env, jobj));
// set log level
auto* options = reinterpret_cast<ROCKSDB_NAMESPACE::Options*>(joptions);
sptr_logger->get()->SetInfoLogLevel(options->info_log_level);
return GET_CPLUSPLUS_POINTER(sptr_logger);
}
/*
* Class: org_rocksdb_Logger
* Method: createNewLoggerDbOptions
* Signature: (J)J
*/
jlong Java_org_rocksdb_Logger_createNewLoggerDbOptions(JNIEnv* env,
jobject jobj,
jlong jdb_options) {
auto* sptr_logger = new std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>(
new ROCKSDB_NAMESPACE::LoggerJniCallback(env, jobj));
// set log level
auto* db_options =
reinterpret_cast<ROCKSDB_NAMESPACE::DBOptions*>(jdb_options);
sptr_logger->get()->SetInfoLogLevel(db_options->info_log_level);
return GET_CPLUSPLUS_POINTER(sptr_logger);
}
/*
* Class: org_rocksdb_Logger
* Method: setInfoLogLevel
* Signature: (JB)V
*/
void Java_org_rocksdb_Logger_setInfoLogLevel(JNIEnv* /*env*/, jobject /*jobj*/,
jlong jhandle, jbyte jlog_level) {
auto* handle =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>*>(
jhandle);
handle->get()->SetInfoLogLevel(
static_cast<ROCKSDB_NAMESPACE::InfoLogLevel>(jlog_level));
}
/*
* Class: org_rocksdb_Logger
* Method: infoLogLevel
* Signature: (J)B
*/
jbyte Java_org_rocksdb_Logger_infoLogLevel(JNIEnv* /*env*/, jobject /*jobj*/,
jlong jhandle) {
auto* handle =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>*>(
jhandle);
return static_cast<jbyte>(handle->get()->GetInfoLogLevel());
}
/*
* Class: org_rocksdb_Logger
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_Logger_disposeInternal(JNIEnv* /*env*/, jobject /*jobj*/,
jlong jhandle) {
auto* handle =
reinterpret_cast<std::shared_ptr<ROCKSDB_NAMESPACE::LoggerJniCallback>*>(
jhandle);
delete handle; // delete std::shared_ptr
}