From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- .../rocksjni/transaction_notifier_jnicallback.h | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h (limited to 'src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h') diff --git a/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h b/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h new file mode 100644 index 000000000..b3155b5a3 --- /dev/null +++ b/src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h @@ -0,0 +1,42 @@ +// 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::TransactionNotifier. + +#ifndef JAVA_ROCKSJNI_TRANSACTION_NOTIFIER_JNICALLBACK_H_ +#define JAVA_ROCKSJNI_TRANSACTION_NOTIFIER_JNICALLBACK_H_ + +#include + +#include "rocksdb/utilities/transaction.h" +#include "rocksjni/jnicallback.h" + +namespace ROCKSDB_NAMESPACE { + +/** + * This class acts as a bridge between C++ + * and Java. The methods in this class will be + * called back from the RocksDB TransactionDB or OptimisticTransactionDB (C++), + * we then callback to the appropriate Java method + * this enables TransactionNotifier to be implemented in Java. + * + * Unlike RocksJava's Comparator JNI Callback, we do not attempt + * to reduce Java object allocations by caching the Snapshot object + * presented to the callback. This could be revisited in future + * if performance is lacking. + */ +class TransactionNotifierJniCallback: public JniCallback, + public TransactionNotifier { + public: + TransactionNotifierJniCallback(JNIEnv* env, jobject jtransaction_notifier); + virtual void SnapshotCreated(const Snapshot* newSnapshot); + + private: + jmethodID m_jsnapshot_created_methodID; +}; +} // namespace ROCKSDB_NAMESPACE + +#endif // JAVA_ROCKSJNI_TRANSACTION_NOTIFIER_JNICALLBACK_H_ -- cgit v1.2.3