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// 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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#pragma once
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#include <map>
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#include <stdexcept>
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#include <string>
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Add OptionsUtil::LoadOptionsFromFile() API
Summary:
This patch adds OptionsUtil::LoadOptionsFromFile() and
OptionsUtil::LoadLatestOptionsFromDB(), which allow developers
to construct DBOptions and ColumnFamilyOptions from a RocksDB
options file. Note that most pointer-typed options such as
merge_operator will not be constructed.
With this API, developers no longer need to remember all the
options in order to reopen an existing rocksdb instance like
the following:
DBOptions db_options;
std::vector<std::string> cf_names;
std::vector<ColumnFamilyOptions> cf_opts;
// Load primitive-typed options from an existing DB
OptionsUtil::LoadLatestOptionsFromDB(
dbname, &db_options, &cf_names, &cf_opts);
// Initialize necessary pointer-typed options
cf_opts[0].merge_operator.reset(new MyMergeOperator());
...
// Construct the vector of ColumnFamilyDescriptor
std::vector<ColumnFamilyDescriptor> cf_descs;
for (size_t i = 0; i < cf_opts.size(); ++i) {
cf_descs.emplace_back(cf_names[i], cf_opts[i]);
}
// Open the DB
DB* db = nullptr;
std::vector<ColumnFamilyHandle*> cf_handles;
auto s = DB::Open(db_options, dbname, cf_descs,
&handles, &db);
Test Plan:
Augment existing tests in column_family_test
options_test
db_test
Reviewers: igor, IslamAbdelRahman, sdong, anthony
Reviewed By: anthony
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D49095
9 years ago
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#include <vector>
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#include "rocksdb/options.h"
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#include "rocksdb/status.h"
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#include "rocksdb/table.h"
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namespace ROCKSDB_NAMESPACE {
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struct ColumnFamilyOptions;
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struct ConfigOptions;
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struct DBOptions;
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struct ImmutableCFOptions;
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struct ImmutableDBOptions;
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struct MutableDBOptions;
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struct MutableCFOptions;
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struct Options;
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std::vector<CompressionType> GetSupportedCompressions();
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std::vector<CompressionType> GetSupportedDictCompressions();
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// Checks that the combination of DBOptions and ColumnFamilyOptions are valid
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Status ValidateOptions(const DBOptions& db_opts,
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const ColumnFamilyOptions& cf_opts);
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DBOptions BuildDBOptions(const ImmutableDBOptions& immutable_db_options,
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const MutableDBOptions& mutable_db_options);
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ColumnFamilyOptions BuildColumnFamilyOptions(
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const ColumnFamilyOptions& ioptions,
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const MutableCFOptions& mutable_cf_options);
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void UpdateColumnFamilyOptions(const ImmutableCFOptions& ioptions,
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ColumnFamilyOptions* cf_opts);
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void UpdateColumnFamilyOptions(const MutableCFOptions& moptions,
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ColumnFamilyOptions* cf_opts);
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#ifndef ROCKSDB_LITE
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std::unique_ptr<Configurable> DBOptionsAsConfigurable(
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const MutableDBOptions& opts);
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std::unique_ptr<Configurable> DBOptionsAsConfigurable(
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const DBOptions& opts,
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const std::unordered_map<std::string, std::string>* opt_map = nullptr);
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std::unique_ptr<Configurable> CFOptionsAsConfigurable(
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const MutableCFOptions& opts);
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std::unique_ptr<Configurable> CFOptionsAsConfigurable(
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const ColumnFamilyOptions& opts,
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const std::unordered_map<std::string, std::string>* opt_map = nullptr);
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extern Status StringToMap(
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const std::string& opts_str,
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std::unordered_map<std::string, std::string>* opts_map);
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#endif // !ROCKSDB_LITE
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struct OptionsHelper {
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static const std::string kCFOptionsName /*= "ColumnFamilyOptions"*/;
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static const std::string kDBOptionsName /*= "DBOptions" */;
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static std::map<CompactionStyle, std::string> compaction_style_to_string;
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static std::map<CompactionPri, std::string> compaction_pri_to_string;
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static std::map<CompactionStopStyle, std::string>
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compaction_stop_style_to_string;
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static std::unordered_map<std::string, ChecksumType> checksum_type_string_map;
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static std::unordered_map<std::string, CompressionType>
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compression_type_string_map;
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#ifndef ROCKSDB_LITE
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static std::unordered_map<std::string, CompactionStopStyle>
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compaction_stop_style_string_map;
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static std::unordered_map<std::string, EncodingType> encoding_type_string_map;
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static std::unordered_map<std::string, CompactionStyle>
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compaction_style_string_map;
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static std::unordered_map<std::string, CompactionPri>
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compaction_pri_string_map;
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#endif // !ROCKSDB_LITE
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};
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// Some aliasing
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static auto& compaction_style_to_string =
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OptionsHelper::compaction_style_to_string;
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static auto& compaction_pri_to_string = OptionsHelper::compaction_pri_to_string;
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static auto& compaction_stop_style_to_string =
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OptionsHelper::compaction_stop_style_to_string;
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static auto& checksum_type_string_map = OptionsHelper::checksum_type_string_map;
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#ifndef ROCKSDB_LITE
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static auto& compaction_stop_style_string_map =
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OptionsHelper::compaction_stop_style_string_map;
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static auto& compression_type_string_map =
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OptionsHelper::compression_type_string_map;
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static auto& encoding_type_string_map = OptionsHelper::encoding_type_string_map;
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static auto& compaction_style_string_map =
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OptionsHelper::compaction_style_string_map;
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static auto& compaction_pri_string_map =
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OptionsHelper::compaction_pri_string_map;
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#endif // !ROCKSDB_LITE
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} // namespace ROCKSDB_NAMESPACE
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