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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/java/rocksjni/transaction_notifier_jnicallback.h | 42 |
1 files changed, 42 insertions, 0 deletions
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..089a5ee4a --- /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 <jni.h> + +#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_ |