7d472accdc
Summary: This PR merges the functionality of making the ColumnFamilyOptions, TableFactory, and DBOptions into Configurable into a single PR, resolving any merge conflicts Pull Request resolved: https://github.com/facebook/rocksdb/pull/5753 Reviewed By: ajkr Differential Revision: D23385030 Pulled By: zhichao-cao fbshipit-source-id: 8b977a7731556230b9b8c5a081b98e49ee4f160a
212 lines
11 KiB
C++
212 lines
11 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "rocksdb/configurable.h"
|
|
#include "rocksdb/convenience.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
// Helper class defining static methods for supporting the Configurable
|
|
// class. The purpose of this class is to keep the Configurable class
|
|
// as tight as possible and provide methods for doing the actual work
|
|
// of configuring the objects.
|
|
class ConfigurableHelper {
|
|
public:
|
|
// Registers the input name with the options and associated map.
|
|
// When classes register their options in this manner, most of the
|
|
// functionality (excluding unknown options and validate/prepare) is
|
|
// implemented by the base class.
|
|
//
|
|
// This method should be called in the class constructor to register the
|
|
// option set for this object. For example, to register the options
|
|
// associated with the BlockBasedTableFactory, the constructor calls this
|
|
// method passing in:
|
|
// - the name of the options ("BlockBasedTableOptions");
|
|
// - the options object (the BlockBasedTableOptions object for this object;
|
|
// - the options type map for the BlockBasedTableOptions.
|
|
// This registration allows the Configurable class to process the option
|
|
// values associated with the BlockBasedTableOptions without further code in
|
|
// the derived class.
|
|
//
|
|
// @param name The name of this set of options (@see GetOptionsPtr)
|
|
// @param opt_ptr Pointer to the options to associate with this name
|
|
// @param opt_map Options map that controls how this option is configured.
|
|
template <typename T>
|
|
static void RegisterOptions(
|
|
Configurable& configurable, T* opt_ptr,
|
|
const std::unordered_map<std::string, OptionTypeInfo>* opt_map) {
|
|
RegisterOptions(configurable, T::kName(), opt_ptr, opt_map);
|
|
}
|
|
static void RegisterOptions(
|
|
Configurable& configurable, const std::string& name, void* opt_ptr,
|
|
const std::unordered_map<std::string, OptionTypeInfo>* opt_map);
|
|
|
|
// Configures the input Configurable object based on the parameters.
|
|
// On successful completion, the Configurable is updated with the settings
|
|
// from the opt_map.
|
|
//
|
|
// The acceptable values of the name/value pairs are documented with the
|
|
// specific class/instance.
|
|
//
|
|
// @param config_options Controls how the arguments are processed.
|
|
// @param opt_map Name/value pairs of the options to update
|
|
// @param unused If specified, this value will return the name/value
|
|
// pairs from opt_map that were NotFound for this object.
|
|
// @return OK If all values in the map were successfully updated
|
|
// @return NotFound If any of the names in the opt_map were not valid
|
|
// for this object. If unused is specified, it will contain the
|
|
// collection of NotFound entries
|
|
// @return NotSupported If any of the names are valid but the object does
|
|
// not know how to convert the value. This can happen if, for example,
|
|
// there is some nested Configurable that cannot be created.
|
|
// @return InvalidArgument If any of the values cannot be successfully
|
|
// parsed. This can also be returned if PrepareOptions encounters an
|
|
// error.
|
|
static Status ConfigureOptions(
|
|
const ConfigOptions& config_options, Configurable& configurable,
|
|
const std::unordered_map<std::string, std::string>& options,
|
|
std::unordered_map<std::string, std::string>* unused);
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
// Internal method to configure a set of options for this object.
|
|
// Classes may override this value to change its behavior.
|
|
// @param config_options Controls how the options are being configured
|
|
// @param type_name The name that was registered for this set of options
|
|
// @param type_map The map of options for this name
|
|
// @param opt_ptr Pointer to the object being configured for this option set.
|
|
// @param options The option name/values being updated. On return, any
|
|
// option that was found is removed from the list.
|
|
// @return OK If all of the options were successfully updated.
|
|
// @return InvalidArgument If an option was found but the value could not
|
|
// be updated.
|
|
// @return NotFound If an option name was not found in type_mape
|
|
// @return NotSupported If the option was found but no rule for converting
|
|
// the value could be found.
|
|
static Status ConfigureSomeOptions(
|
|
const ConfigOptions& config_options, Configurable& configurable,
|
|
const std::unordered_map<std::string, OptionTypeInfo>& type_map,
|
|
std::unordered_map<std::string, std::string>* options, void* opt_ptr);
|
|
|
|
// Configures a single option in the input Configurable.
|
|
// This method will look through the set of option names for this
|
|
// Configurable searching for one with the input name. If such an option
|
|
// is found, it will be configured via the input value.
|
|
//
|
|
// @param config_options Controls how the option is being configured
|
|
// @param configurable The object to configure
|
|
// @param name For options with sub-options (like Structs or
|
|
// Configurables),
|
|
// this value may be the name of the sub-field of the option being
|
|
// updated. For example, if the option is
|
|
// "compaction_options_fifo.allow_compaction", then field name would be
|
|
// "allow_compaction". For most options, field_name and opt_name will be
|
|
// equivalent.
|
|
// @param value The new value for this option.
|
|
// @param See ConfigureOptions for the possible return values
|
|
static Status ConfigureSingleOption(const ConfigOptions& config_options,
|
|
Configurable& configurable,
|
|
const std::string& name,
|
|
const std::string& value);
|
|
|
|
// Configures the option referenced by opt_info for this configurable
|
|
// This method configures the option based on opt_info for the input
|
|
// configurable.
|
|
// @param config_options Controls how the option is being configured
|
|
// @param configurable The object to configure
|
|
// @param opt_name The full option name
|
|
// @param name For options with sub-options (like Structs or
|
|
// Configurables),
|
|
// this value may be the name of the sub-field of the option being
|
|
// updated. For example, if the option is
|
|
// "compaction_options_fifo.allow_compaction", then field name would be
|
|
// "allow_compaction". For most options, field_name and opt_name will be
|
|
// equivalent.
|
|
// @param value The new value for this option.
|
|
// @param See ConfigureOptions for the possible return values
|
|
static Status ConfigureOption(const ConfigOptions& config_options,
|
|
Configurable& configurable,
|
|
const OptionTypeInfo& opt_info,
|
|
const std::string& opt_name,
|
|
const std::string& name,
|
|
const std::string& value, void* opt_ptr);
|
|
|
|
// Returns the value of the option associated with the input name
|
|
// This method is the functional inverse of ConfigureOption
|
|
// @param config_options Controls how the value is returned
|
|
// @param configurable The object from which to get the option.
|
|
// @param name The name of the option to return a value for.
|
|
// @param value The returned value associated with the named option.
|
|
// Note that value will be only the serialized version
|
|
// of the option and not "name=value"
|
|
// @return OK If the named field was successfully updated to value.
|
|
// @return NotFound If the name is not valid for this object.
|
|
// @param InvalidArgument If the name is valid for this object but
|
|
// its value cannot be serialized.
|
|
static Status GetOption(const ConfigOptions& config_options,
|
|
const Configurable& configurable,
|
|
const std::string& name, std::string* value);
|
|
|
|
// Serializes the input Configurable into the output result.
|
|
// This is the inverse of ConfigureOptions
|
|
// @param config_options Controls how serialization happens.
|
|
// @param configurable The object to serialize
|
|
// @param prefix A prefix to add to the each option as it is serialized.
|
|
// @param result The string representation of the configurable.
|
|
// @return OK If the options for this object wer successfully serialized.
|
|
// @return InvalidArgument If one or more of the options could not be
|
|
// serialized.
|
|
static Status SerializeOptions(const ConfigOptions& config_options,
|
|
const Configurable& configurable,
|
|
const std::string& prefix,
|
|
std::string* result);
|
|
|
|
// Internal method to list the option names for this object.
|
|
// Classes may override this value to change its behavior.
|
|
// @see ListOptions for more details
|
|
static Status ListOptions(const ConfigOptions& config_options,
|
|
const Configurable& configurable,
|
|
const std::string& prefix,
|
|
std::unordered_set<std::string>* result);
|
|
|
|
// Checks to see if the two configurables are equivalent to one other.
|
|
// This method assumes that the two objects are of the same class.
|
|
// @param config_options Controls how the options are compared.
|
|
// @param this_one The object to compare to.
|
|
// @param that_one The other object being compared.
|
|
// @param mismatch If the objects do not match, this parameter contains
|
|
// the name of the option that triggered the match failure.
|
|
// @param True if the objects match, false otherwise.
|
|
static bool AreEquivalent(const ConfigOptions& config_options,
|
|
const Configurable& this_one,
|
|
const Configurable& that_one,
|
|
std::string* mismatch);
|
|
|
|
private:
|
|
// Looks for the option specified by name in the RegisteredOptions.
|
|
// This method traverses the types in the input options vector. If an entry
|
|
// matching name is found, that entry, opt_name, and pointer are returned.
|
|
// @param options The vector of options to search through
|
|
// @param name The name of the option to search for in the OptionType map
|
|
// @param opt_name If the name was found, this value is set to the option name
|
|
// associated with the input name/type.
|
|
// @param opt_ptr If the name was found, this value is set to the option
|
|
// pointer
|
|
// in the RegisteredOptions vector associated with this entry
|
|
// @return A pointer to the OptionTypeInfo from the options if found,
|
|
// nullptr if the name was not found in the input options
|
|
static const OptionTypeInfo* FindOption(
|
|
const std::vector<Configurable::RegisteredOptions>& options,
|
|
const std::string& name, std::string* opt_name, void** opt_ptr);
|
|
#endif // ROCKSDB_LITE
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|