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83 lines
2.9 KiB
83 lines
2.9 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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#include "rocksdb/sst_partitioner.h"
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#include <algorithm>
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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 "rocksdb/utilities/options_type.h"
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namespace ROCKSDB_NAMESPACE {
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static std::unordered_map<std::string, OptionTypeInfo>
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sst_fixed_prefix_type_info = {
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{"length",
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{0, OptionType::kSizeT, OptionVerificationType::kNormal,
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OptionTypeFlags::kNone}},
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};
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SstPartitionerFixedPrefixFactory::SstPartitionerFixedPrefixFactory(size_t len)
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: len_(len) {
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RegisterOptions("Length", &len_, &sst_fixed_prefix_type_info);
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}
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PartitionerResult SstPartitionerFixedPrefix::ShouldPartition(
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const PartitionerRequest& request) {
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Slice last_key_fixed(*request.prev_user_key);
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if (last_key_fixed.size() > len_) {
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last_key_fixed.size_ = len_;
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}
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Slice current_key_fixed(*request.current_user_key);
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if (current_key_fixed.size() > len_) {
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current_key_fixed.size_ = len_;
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}
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return last_key_fixed.compare(current_key_fixed) != 0 ? kRequired
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: kNotRequired;
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}
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bool SstPartitionerFixedPrefix::CanDoTrivialMove(
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const Slice& smallest_user_key, const Slice& largest_user_key) {
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return ShouldPartition(PartitionerRequest(smallest_user_key, largest_user_key,
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0)) == kNotRequired;
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}
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std::unique_ptr<SstPartitioner>
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SstPartitionerFixedPrefixFactory::CreatePartitioner(
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const SstPartitioner::Context& /* context */) const {
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return std::unique_ptr<SstPartitioner>(new SstPartitionerFixedPrefix(len_));
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}
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std::shared_ptr<SstPartitionerFactory> NewSstPartitionerFixedPrefixFactory(
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size_t prefix_len) {
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return std::make_shared<SstPartitionerFixedPrefixFactory>(prefix_len);
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}
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namespace {
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static int RegisterSstPartitionerFactories(ObjectLibrary& library,
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const std::string& /*arg*/) {
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library.AddFactory<SstPartitionerFactory>(
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SstPartitionerFixedPrefixFactory::kClassName(),
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[](const std::string& /*uri*/,
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std::unique_ptr<SstPartitionerFactory>* guard,
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std::string* /* errmsg */) {
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guard->reset(new SstPartitionerFixedPrefixFactory(0));
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return guard->get();
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});
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return 1;
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}
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} // namespace
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Status SstPartitionerFactory::CreateFromString(
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const ConfigOptions& options, const std::string& value,
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std::shared_ptr<SstPartitionerFactory>* result) {
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static std::once_flag once;
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std::call_once(once, [&]() {
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RegisterSstPartitionerFactories(*(ObjectLibrary::Default().get()), "");
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});
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return LoadSharedObject<SstPartitionerFactory>(options, value, result);
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}
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} // namespace ROCKSDB_NAMESPACE
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