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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::TransactionNotifier.
#include "rocksjni/transaction_notifier_jnicallback.h"
#include "rocksjni/portal.h"
namespace rocksdb {
TransactionNotifierJniCallback::TransactionNotifierJniCallback(JNIEnv* env,
jobject jtransaction_notifier) : JniCallback(env, jtransaction_notifier) {
// we cache the method id for the JNI callback
m_jsnapshot_created_methodID =
AbstractTransactionNotifierJni::getSnapshotCreatedMethodId(env);
}
void TransactionNotifierJniCallback::SnapshotCreated(
const Snapshot* newSnapshot) {
jboolean attached_thread = JNI_FALSE;
JNIEnv* env = getJniEnv(&attached_thread);
assert(env != nullptr);
env->CallVoidMethod(m_jcallback_obj,
m_jsnapshot_created_methodID, reinterpret_cast<jlong>(newSnapshot));
if(env->ExceptionCheck()) {
// exception thrown from CallVoidMethod
env->ExceptionDescribe(); // print out exception to stderr
releaseJniEnv(attached_thread);
return;
}
releaseJniEnv(attached_thread);
}
} // namespace rocksdb
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