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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/rocksdb/utilities/cassandra/merge_operator.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream/16.2.11+ds.tar.xz ceph-upstream/16.2.11+ds.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/utilities/cassandra/merge_operator.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/cassandra/merge_operator.h b/src/rocksdb/utilities/cassandra/merge_operator.h new file mode 100644 index 000000000..b5bf7c520 --- /dev/null +++ b/src/rocksdb/utilities/cassandra/merge_operator.h @@ -0,0 +1,44 @@ +// Copyright (c) 2017-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). + +#pragma once +#include "rocksdb/merge_operator.h" +#include "rocksdb/slice.h" + +namespace ROCKSDB_NAMESPACE { +namespace cassandra { + +/** + * A MergeOperator for rocksdb that implements Cassandra row value merge. + */ +class CassandraValueMergeOperator : public MergeOperator { +public: + explicit CassandraValueMergeOperator(int32_t gc_grace_period_in_seconds, + size_t operands_limit = 0) + : gc_grace_period_in_seconds_(gc_grace_period_in_seconds), + operands_limit_(operands_limit) {} + + virtual bool FullMergeV2(const MergeOperationInput& merge_in, + MergeOperationOutput* merge_out) const override; + + virtual bool PartialMergeMulti(const Slice& key, + const std::deque<Slice>& operand_list, + std::string* new_value, + Logger* logger) const override; + + virtual const char* Name() const override; + + virtual bool AllowSingleOperand() const override { return true; } + + virtual bool ShouldMerge(const std::vector<Slice>& operands) const override { + return operands_limit_ > 0 && operands.size() >= operands_limit_; + } + +private: + int32_t gc_grace_period_in_seconds_; + size_t operands_limit_; +}; +} // namespace cassandra +} // namespace ROCKSDB_NAMESPACE |