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https://github.com/facebook/rocksdb.git
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1973fcba11
Summary: In order to support old-style regex function registration, restored the original "Register<T>(string, Factory)" method using regular expressions. The PatternEntry methods were left in place but renamed to AddFactory. The goal is to allow for the deprecation of the original regex Registry method in an upcoming release. Added modes to the PatternEntry kMatchZeroOrMore and kMatchAtLeastOne to match * or +, respectively (kMatchAtLeastOne was the original behavior). Pull Request resolved: https://github.com/facebook/rocksdb/pull/9362 Reviewed By: pdillinger Differential Revision: D33432562 Pulled By: mrambacher fbshipit-source-id: ed88ab3f9a2ad0d525c7bd1692873f9bb3209d02
121 lines
4.8 KiB
C++
121 lines
4.8 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/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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namespace ROCKSDB_NAMESPACE {
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static bool LoadMergeOperator(const std::string& id,
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std::shared_ptr<MergeOperator>* result) {
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bool success = true;
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// TODO: Hook the "name" up to the actual Name() of the MergeOperators?
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// Requires these classes be moved into a header file...
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if (id == "put" || id == "PutOperator") {
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*result = MergeOperators::CreatePutOperator();
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} else if (id == "put_v1") {
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*result = MergeOperators::CreateDeprecatedPutOperator();
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} else if (id == "uint64add" || id == "UInt64AddOperator") {
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*result = MergeOperators::CreateUInt64AddOperator();
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} else if (id == "max" || id == "MaxOperator") {
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*result = MergeOperators::CreateMaxOperator();
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#ifdef ROCKSDB_LITE
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// The remainder of the classes are handled by the ObjectRegistry in
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// non-LITE mode
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} else if (id == StringAppendOperator::kNickName() ||
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id == StringAppendOperator::kClassName()) {
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*result = MergeOperators::CreateStringAppendOperator();
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} else if (id == StringAppendTESTOperator::kNickName() ||
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id == StringAppendTESTOperator::kClassName()) {
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*result = MergeOperators::CreateStringAppendTESTOperator();
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} else if (id == BytesXOROperator::kNickName() ||
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id == BytesXOROperator::kClassName()) {
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*result = MergeOperators::CreateBytesXOROperator();
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} else if (id == SortList::kNickName() || id == SortList::kClassName()) {
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*result = MergeOperators::CreateSortOperator();
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#endif // ROCKSDB_LITE
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} else {
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success = false;
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}
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return success;
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}
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#ifndef ROCKSDB_LITE
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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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return static_cast<int>(library.GetFactoryCount(&num_types));
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}
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#endif // ROCKSDB_LITE
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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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#ifndef ROCKSDB_LITE
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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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#endif // ROCKSDB_LITE
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return LoadSharedObject<MergeOperator>(config_options, value,
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LoadMergeOperator, 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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