mirror of
https://github.com/facebook/rocksdb.git
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d057e8326d
Summary: - Changed MergeOperator, CompactionFilter, and CompactionFilterFactory into Customizable classes. - Added Options/Configurable/Object Registration for TTL and Cassandra variants - Changed the StringAppend MergeOperators to accept a string delimiter rather than a simple char. Made the delimiter into a configurable option - Added tests for new functionality Pull Request resolved: https://github.com/facebook/rocksdb/pull/8481 Reviewed By: zhichao-cao Differential Revision: D30136050 Pulled By: mrambacher fbshipit-source-id: 271d1772835935b6773abaf018ee71e42f9491af
126 lines
4.9 KiB
C++
126 lines
4.9 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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auto AsRegex = [](const std::string& name, const std::string& alt) {
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std::string regex;
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regex.append("(").append(name);
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regex.append("|").append(alt).append(")");
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return regex;
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};
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library.Register<MergeOperator>(
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AsRegex(StringAppendOperator::kClassName(),
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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.Register<MergeOperator>(
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AsRegex(StringAppendTESTOperator::kClassName(),
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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.Register<MergeOperator>(
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AsRegex(SortList::kClassName(), 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.Register<MergeOperator>(
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AsRegex(BytesXOROperator::kClassName(), 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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