mirror of https://github.com/facebook/rocksdb.git
116 lines
4.6 KiB
C++
116 lines
4.6 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "utilities/merge_operators.h"
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#include <memory>
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/options.h"
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#include "rocksdb/utilities/customizable_util.h"
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#include "rocksdb/utilities/object_registry.h"
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#include "utilities/merge_operators/bytesxor.h"
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#include "utilities/merge_operators/max_operator.h"
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#include "utilities/merge_operators/put_operator.h"
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#include "utilities/merge_operators/sortlist.h"
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#include "utilities/merge_operators/string_append/stringappend.h"
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#include "utilities/merge_operators/string_append/stringappend2.h"
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#include "utilities/merge_operators/uint64add.h"
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namespace ROCKSDB_NAMESPACE {
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static int RegisterBuiltinMergeOperators(ObjectLibrary& library,
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const std::string& /*arg*/) {
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size_t num_types;
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(StringAppendOperator::kClassName())
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.AnotherName(StringAppendOperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new StringAppendOperator(","));
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(StringAppendTESTOperator::kClassName())
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.AnotherName(StringAppendTESTOperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new StringAppendTESTOperator(","));
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(SortList::kClassName())
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.AnotherName(SortList::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new SortList());
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(BytesXOROperator::kClassName())
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.AnotherName(BytesXOROperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new BytesXOROperator());
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(UInt64AddOperator::kClassName())
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.AnotherName(UInt64AddOperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new UInt64AddOperator());
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(MaxOperator::kClassName())
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.AnotherName(MaxOperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new MaxOperator());
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(PutOperatorV2::kClassName())
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.AnotherName(PutOperatorV2::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new PutOperatorV2());
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return guard->get();
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});
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library.AddFactory<MergeOperator>(
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ObjectLibrary::PatternEntry(PutOperator::kNickName()),
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[](const std::string& /*uri*/, std::unique_ptr<MergeOperator>* guard,
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std::string* /*errmsg*/) {
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guard->reset(new PutOperator());
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return guard->get();
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});
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return static_cast<int>(library.GetFactoryCount(&num_types));
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}
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Status MergeOperator::CreateFromString(const ConfigOptions& config_options,
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const std::string& value,
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std::shared_ptr<MergeOperator>* result) {
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static std::once_flag once;
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std::call_once(once, [&]() {
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RegisterBuiltinMergeOperators(*(ObjectLibrary::Default().get()), "");
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});
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return LoadSharedObject<MergeOperator>(config_options, value, result);
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}
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std::shared_ptr<MergeOperator> MergeOperators::CreateFromStringId(
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const std::string& id) {
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std::shared_ptr<MergeOperator> result;
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Status s = MergeOperator::CreateFromString(ConfigOptions(), id, &result);
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if (s.ok()) {
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return result;
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} else {
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// Empty or unknown, just return nullptr
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return nullptr;
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}
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}
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} // namespace ROCKSDB_NAMESPACE
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