Configuration. More...

#include <config_parser.h>

Inheritance diagram for mysql_harness::Config:

Public Types
using	SectionKey = std::pair< std::string, std::string >

using	OptionMap = ConfigSection::OptionMap

using	SectionList = std::list< ConfigSection * >

using	ConstSectionList = std::list< const ConfigSection * >

using	ConfigOverwrites = std::map< std::pair< std::string, std::string >, std::map< std::string, std::string > >

Public Member Functions
	Config (unsigned int flags=0U, const ConfigOverwrites &config_overwrites={})
	Construct a configuration. More...

template<class AssocT >
	Config (const AssocT &parameters, unsigned int flags=0U, const ConfigOverwrites &config_overwrites={})
	Construct a configuration. More...

template<class AssocT , class SeqT >
	Config (const AssocT &parameters, const SeqT &reserved, unsigned int flags=0U, const ConfigOverwrites &config_overwrites={})
	Construct a configuration. More...

	Config (const Config &)=default

Config &	operator= (const Config &)=default

virtual	~Config ()=default

template<class SeqT >
void	set_reserved (const SeqT &reserved)

void	read (std::istream &input)
	Read configuration file from file, directory, or input stream. More...

void	read (const Path &path)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

void	read (const Path &path, const std::string &pattern)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

bool	empty () const
	Check if the configuration is empty. More...

void	clear ()
	Clear the configuration. More...

bool	remove (const SectionKey &section_key) noexcept
	Remove section from configuration. More...

bool	remove (const std::string &section, const std::string &key=std::string()) noexcept
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

void	update (const Config &other)
	Update configuration using another configuration. More...

ConstSectionList	get (const std::string &section) const
	Get a list of sections having a name. More...

SectionList	get (const std::string &section)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

ConfigSection &	get_default_section () const

ConfigSection &	get (const std::string &section, const std::string &key)
	Get a section by name and key. More...

const ConfigSection &	get (const std::string &section, const std::string &key) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

ConfigSection &	add (const std::string &section, const std::string &key=std::string())
	Add a new section to the configuration. More...

bool	has (const std::string &section, const std::string &key=std::string()) const

bool	has_any (std::string_view section) const

std::string	get_default (std::string_view option) const

bool	has_default (std::string_view option) const

void	set_default (const std::string &option, const std::string &value)

bool	is_reserved (const std::string &word) const

std::list< Config::SectionKey >	section_names () const

ConstSectionList	sections () const
	Get a list of all sections in the configuration. More...

Public Attributes
bool	error_on_unsupported_option {false}

Static Public Attributes
static constexpr const char *	DEFAULT_PATTERN = "*.cfg"
	Default pattern to used to identify configuration files. More...


static constexpr unsigned int	allow_keys = 1U
	Flags for construction of configurations. More...

Protected Types
using	SectionMap = std::map< SectionKey, ConfigSection >

using	ReservedList = std::vector< std::string >

Protected Member Functions
void	copy_guts (const Config &source) noexcept
	Copy the guts of another configuration. More...

virtual void	do_read_file (const Path &path)
	Function to read single file. More...

virtual void	do_read_stream (std::istream &input)
	Function to read the configuration from a stream. More...

void	apply_overwrites ()

Protected Attributes
SectionMap	sections_

ReservedList	reserved_

std::shared_ptr< ConfigSection >	defaults_

unsigned int	flags_

ConfigOverwrites	config_overwrites_

Detailed Description

Configuration.

A configuration consisting of named configuration sections.

There are three different constructors that are available with different kind of parameters.

Member Typedef Documentation

◆ ConfigOverwrites

using mysql_harness::Config::ConfigOverwrites = std::map<std::pair<std::string, std::string>, std::map<std::string, std::string> >

◆ ConstSectionList

using mysql_harness::Config::ConstSectionList = std::list<const ConfigSection *>

◆ OptionMap

using mysql_harness::Config::OptionMap = ConfigSection::OptionMap

◆ ReservedList

using mysql_harness::Config::ReservedList = std::vector<std::string>

protected

◆ SectionKey

using mysql_harness::Config::SectionKey = std::pair<std::string, std::string>

◆ SectionList

using mysql_harness::Config::SectionList = std::list<ConfigSection *>

◆ SectionMap

using mysql_harness::Config::SectionMap = std::map<SectionKey, ConfigSection>

protected

Constructor & Destructor Documentation

◆ Config() [1/4]

mysql_harness::Config::Config	(	unsigned int	flags = `0U`,
		const ConfigOverwrites &	config_overwrites = `{}`
	)

explicit

Construct a configuration.

Parameters

flags	flags.
config_overwrites	overwrites for selected configuration options.

◆ Config() [2/4]

template<class AssocT >

mysql_harness::Config::Config	(	const AssocT &	parameters,
		unsigned int	flags = `0U`,
		const ConfigOverwrites &	config_overwrites = `{}`
	)

inlineexplicit

Construct a configuration.

Template Parameters

AssocT

Associate container type

parameters Associative container with parameters.
flags flags.
config_overwrites overwrites for selected configuration options.

Exceptions

bad_option on bad options

◆ Config() [3/4]

template<class AssocT , class SeqT >

mysql_harness::Config::Config	(	const AssocT &	parameters,
		const SeqT &	reserved,
		unsigned int	flags = `0U`,
		const ConfigOverwrites &	config_overwrites = `{}`
	)

inlineexplicit

Construct a configuration.

Construct a configuration instance by reading a configuration file and overriding the values read from a list of supplied parameters.

Template Parameters

AssocT	Associate container type
SeqT	Sequence container type `parameters` Associative container with parameters. `reserved` Sequence container of reserved words. `flags` flags. `config_overwrites` overwrites for selected configuration options.

Exceptions

bad_option on bad options

◆ Config() [4/4]

mysql_harness::Config::Config ( const Config & )

default

◆ ~Config()

virtual mysql_harness::Config::~Config ( )

virtualdefault

Member Function Documentation

◆ add()

ConfigSection & mysql_harness::Config::add	(	const std::string &	section,
		const std::string &	key = `std::string()`
	)

Add a new section to the configuration.

Parameters

section	Name of section to add.
key	Optional key of section to add.

Returns: Reference to newly constructed configuration section instance.

◆ apply_overwrites()

void mysql_harness::Config::apply_overwrites ( )

protected

◆ clear()

void mysql_harness::Config::clear ( )

Clear the configuration.

This will remove all configuration information from the configuration, including the default section, but not the reserved words nor the flags set.

◆ copy_guts()

void mysql_harness::Config::copy_guts ( const Config & source )

protectednoexcept

Copy the guts of another configuration.

This member function is used to copy configuration state (the "guts") but not the sections and options, including not copying the default section.

◆ do_read_file()

void mysql_harness::Config::do_read_file ( const Path & path )

protectedvirtual

Function to read single file.

Exceptions

std::runtime_error,syntax_error

◆ do_read_stream()

void mysql_harness::Config::do_read_stream ( std::istream & input )

protectedvirtual

Function to read the configuration from a stream.

Exceptions

syntax_error,maybe bad_section (not sure if it can happen)

Note: This function is guaranteeed to be called for reading all configurations so it can be overridden to handle post- or pre-parsing actions.

◆ empty()

bool mysql_harness::Config::empty ( ) const

Check if the configuration is empty.

Returns: true if there are any sections in the configuration (not counting the default section), false otherwise.

◆ get() [1/4]

Config::SectionList mysql_harness::Config::get ( const std::string & section )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

◆ get() [2/4]

Config::ConstSectionList mysql_harness::Config::get ( const std::string & section ) const

Get a list of sections having a name.

There can be several sections under the same name, but they will have different keys.

Note: The empty string is used to denote the keyless section.

Parameters

section Section name of sections to fetch.

◆ get() [3/4]

ConfigSection & mysql_harness::Config::get	(	const std::string &	section,
		const std::string &	key
	)

Get a section by name and key.

Get a section given a name and a key. Since there can be several sections with the same name (but different keys) this will always return a unique section.

Note: The empty string is used to denote the keyless section.

Parameters

section	Name of section to fetch.
key	Key for section to fetch.

Returns: Reference to section instance.

Exceptions

bad_section Thrown if the section do not exist or if a key were used but is not allowed.

◆ get() [4/4]

const ConfigSection & mysql_harness::Config::get	(	const std::string &	section,
		const std::string &	key
	)		const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

◆ get_default()

std::string mysql_harness::Config::get_default ( std::string_view option ) const

◆ get_default_section()

ConfigSection & mysql_harness::Config::get_default_section ( ) const

◆ has()

bool mysql_harness::Config::has	(	const std::string &	section,
		const std::string &	key = `std::string()`
	)		const

◆ has_any()

bool mysql_harness::Config::has_any ( std::string_view section ) const

Returns: True if a section exists, no matter what the key is.

◆ has_default()

bool mysql_harness::Config::has_default ( std::string_view option ) const

◆ is_reserved()

bool mysql_harness::Config::is_reserved ( const std::string & word ) const

◆ operator=()

Config & mysql_harness::Config::operator= ( const Config & )

default

◆ read() [1/3]

void mysql_harness::Config::read ( const Path & path )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

◆ read() [2/3]

void mysql_harness::Config::read	(	const Path &	path,
		const std::string &	pattern
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

◆ read() [3/3]

void mysql_harness::Config::read ( std::istream & input )

Read configuration file from file, directory, or input stream.

If there are conflicting sections (several instance sections with identical name and key) or conflicting options (several instances of an option in the same section) in the input, an exception will be thrown.

If the input is a stream, the contents of the stream will be added to the configuration, but if the input is either a file or a directory, the exisisting contents of the configuration will be removed.

If a pattern is given, the path is assumed to be a directory and all files matching the pattern will be read into the the configuration object. The files together will be treated as if it is a single file, that is, no conflicting option values or sections are allowed and will raise an exception.

Parameters

input Input stream to read from.

Exceptions

syntax_error	Raised if there is a syntax error in the configuration file and the configuration file have to be corrected.
bad_section	Raised if there is a duplicate section (section with the same name and key) in the input stream.
bad_option	Raised if there is a duplicate definition of an option (same option is given twice in a section).

◆ remove() [1/2]

bool mysql_harness::Config::remove ( const SectionKey & section_key )

noexcept

Remove section from configuration.

Parameters

section_key section+key to remove.

Returns: true if section was removed, false if section did not exist

◆ remove() [2/2]

bool mysql_harness::Config::remove	(	const std::string &	section,
		const std::string &	key = `std::string()`
	)

noexcept

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

◆ section_names()

std::list< Config::SectionKey > mysql_harness::Config::section_names ( ) const

inline

◆ sections()

Config::ConstSectionList mysql_harness::Config::sections ( ) const

Get a list of all sections in the configuration.

◆ set_default()

void mysql_harness::Config::set_default	(	const std::string &	option,
		const std::string &	value
	)

◆ set_reserved()

template<class SeqT >

void mysql_harness::Config::set_reserved ( const SeqT & reserved )

inline

◆ update()

void mysql_harness::Config::update ( const Config & other )

Update configuration using another configuration.

This will incorporate all the sections and options from the other configuration by adding sections that are missing and overwriting option values for sections that exist in the current configuration.

Parameters

other Configuration to read section, options, and values from.

Member Data Documentation

◆ allow_keys

constexpr unsigned int mysql_harness::Config::allow_keys = 1U

staticconstexpr

Flags for construction of configurations.

◆ config_overwrites_

ConfigOverwrites mysql_harness::Config::config_overwrites_

protected

◆ DEFAULT_PATTERN

constexpr const char* mysql_harness::Config::DEFAULT_PATTERN = "*.cfg"

staticconstexpr

Default pattern to used to identify configuration files.

◆ defaults_

std::shared_ptr<ConfigSection> mysql_harness::Config::defaults_

protected

◆ error_on_unsupported_option

bool mysql_harness::Config::error_on_unsupported_option {false}

◆ flags_

unsigned int mysql_harness::Config::flags_

protected

◆ reserved_

ReservedList mysql_harness::Config::reserved_

protected

◆ sections_

SectionMap mysql_harness::Config::sections_

protected

The documentation for this class was generated from the following files:

router/src/harness/include/mysql/harness/config_parser.h
router/src/harness/src/config_parser.cc

Public Types

Public Member Functions

Public Attributes

Static Public Attributes

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

◆ ConfigOverwrites

◆ ConstSectionList

◆ OptionMap

◆ ReservedList

◆ SectionKey

◆ SectionList

◆ SectionMap

Constructor & Destructor Documentation

◆ Config() [1/4]

◆ Config() [2/4]

◆ Config() [3/4]

◆ Config() [4/4]

◆ ~Config()

Member Function Documentation

◆ add()

◆ apply_overwrites()

◆ clear()

◆ copy_guts()

◆ do_read_file()

◆ do_read_stream()

◆ empty()

◆ get() [1/4]

◆ get() [2/4]

◆ get() [3/4]

◆ get() [4/4]

◆ get_default()

◆ get_default_section()

◆ has()

◆ has_any()

◆ has_default()

◆ is_reserved()

◆ operator=()

◆ read() [1/3]

◆ read() [2/3]

◆ read() [3/3]

◆ remove() [1/2]

◆ remove() [2/2]

◆ section_names()

◆ sections()

◆ set_default()

◆ set_reserved()

◆ update()

Member Data Documentation

◆ allow_keys

◆ config_overwrites_

◆ DEFAULT_PATTERN

◆ defaults_

◆ error_on_unsupported_option

◆ flags_

◆ reserved_

◆ sections_