40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// This file implements the callback "bridge" between Java and C++ for
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// rocksdb::TransactionNotifier.
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#include "rocksjni/transaction_notifier_jnicallback.h"
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#include "rocksjni/portal.h"
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namespace rocksdb {
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TransactionNotifierJniCallback::TransactionNotifierJniCallback(JNIEnv* env,
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jobject jtransaction_notifier) : JniCallback(env, jtransaction_notifier) {
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// we cache the method id for the JNI callback
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m_jsnapshot_created_methodID =
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AbstractTransactionNotifierJni::getSnapshotCreatedMethodId(env);
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}
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void TransactionNotifierJniCallback::SnapshotCreated(
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const Snapshot* newSnapshot) {
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jboolean attached_thread = JNI_FALSE;
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JNIEnv* env = getJniEnv(&attached_thread);
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assert(env != nullptr);
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env->CallVoidMethod(m_jcallback_obj,
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m_jsnapshot_created_methodID, reinterpret_cast<jlong>(newSnapshot));
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if(env->ExceptionCheck()) {
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// exception thrown from CallVoidMethod
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env->ExceptionDescribe(); // print out exception to stderr
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releaseJniEnv(attached_thread);
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return;
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}
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releaseJniEnv(attached_thread);
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}
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} // namespace rocksdb
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