Retrieve and manage plugin configuration. More...

#include <plugin_config.h>

Inheritance diagram for mysql_harness::BasePluginConfig:

Public Member Functions
	BasePluginConfig ()=default

	BasePluginConfig (const BasePluginConfig &)=default

	BasePluginConfig (BasePluginConfig &&)=default

BasePluginConfig &	operator= (const BasePluginConfig &)=default

BasePluginConfig &	operator= (BasePluginConfig &&)=default

virtual	~BasePluginConfig ()=default
	destructor More...

std::string	get_option_description (const mysql_harness::ConfigSection *section, std::string_view option) const
	get description of the option. More...

virtual std::string	get_default (std::string_view option) const =0
	Gets the default for the given option. More...

virtual bool	is_required (std::string_view option) const =0
	Returns whether the given option is required. More...

template<class Func >
decltype(auto)	get_option (const mysql_harness::ConfigSection *section, std::string_view option, Func &&transformer) const
	get option value. More...

template<class Func >
decltype(auto)	get_option_no_default (const mysql_harness::ConfigSection *section, std::string_view option, Func &&transformer) const
	get option value. More...

std::string	get_option_string (const mysql_harness::ConfigSection *section, std::string_view option) const
	Gets value of given option as string. More...

template<class T >
T	get_uint_option (const mysql_harness::ConfigSection *section, std::string_view option, T min_value=0, T max_value=std::numeric_limits< T >::max()) const
	Gets an unsigned integer using the given option. More...

std::chrono::milliseconds	get_option_milliseconds (const mysql_harness::ConfigSection *section, std::string_view option, double min_value=0.0, double max_value=std::numeric_limits< double >::max()) const
	Gets a number of milliseconds using the given option. More...

Protected Member Functions
	BasePluginConfig (const mysql_harness::ConfigSection *section)
	Constructor for derived classes. More...

Static Protected Member Functions
static std::string	get_section_name (const mysql_harness::ConfigSection *section)
	Generate the name for this configuration. More...

Private Member Functions
std::optional< std::string >	get_option_string_ (const mysql_harness::ConfigSection *section, std::string_view option) const
	get value of an option from a config-section. More...

std::string	get_option_string_or_default_ (const mysql_harness::ConfigSection *section, std::string_view option) const
	get value of an option from a config-section. More...

Private Attributes
std::string	section_name_
	Name of the section. More...

Detailed Description

Retrieve and manage plugin configuration.

BasePluginConfig is an abstract class which can be used to by plugins to derive their own class retrieving configuration from, for example, Harness ConfigSection instances.

Constructor & Destructor Documentation

◆ BasePluginConfig() [1/4]

mysql_harness::BasePluginConfig::BasePluginConfig ( )

default

◆ BasePluginConfig() [2/4]

mysql_harness::BasePluginConfig::BasePluginConfig ( const BasePluginConfig & )

default

◆ BasePluginConfig() [3/4]

mysql_harness::BasePluginConfig::BasePluginConfig ( BasePluginConfig && )

default

◆ ~BasePluginConfig()

virtual mysql_harness::BasePluginConfig::~BasePluginConfig ( )

virtualdefault

destructor

◆ BasePluginConfig() [4/4]

mysql_harness::BasePluginConfig::BasePluginConfig ( const mysql_harness::ConfigSection * section )

inlineprotected

Constructor for derived classes.

Member Function Documentation

◆ get_default()

virtual std::string mysql_harness::BasePluginConfig::get_default ( std::string_view option ) const

pure virtual

Gets the default for the given option.

Gets the default value of the given option. If no default option is available, an empty string is returned.

Parameters

option name of the option

Returns: default value for given option as std::string

Implemented in ConnectionPoolPluginConfig, DestinationStatusPluginConfig, anonymous_namespace{http_auth_backend_plugin.cc}::HtpasswdPluginConfig, HttpAuthRealmPluginConfig, HttpServerPluginConfig, IoPluginConfig, MetadataCachePluginConfig, PluginConfig, RoutingPluginConfig, anonymous_namespace{logger_plugin.cc}::LoggingPluginConfig, anonymous_namespace{http_auth_backend_plugin.cc}::PluginConfig, RestApiPluginConfig, RestConnectionPoolPluginConfig, RestMetadataCachePluginConfig, RestRouterPluginConfig, and RestRoutingPluginConfig.

◆ get_option()

template<class Func >

decltype(auto) mysql_harness::BasePluginConfig::get_option	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option,
		Func &&	transformer
	)		const

inline

get option value.

gets the option from a config-section (or its default value if it doesn't exist) and converts it with a transformation function.

Parameters

section	configuration section
option	name of the option
transformer	transformation function. The signature of the transformation function should be equivalent to: (const std::string &value, const std::string &option_description) and returns the transformed value.

Returns: return value of the the transformation function.

◆ get_option_description()

std::string mysql_harness::BasePluginConfig::get_option_description	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option
	)		const

get description of the option.

For example, option wait_timeout in section [routing:homepage] will return a prefix (without quotes):

option wait_timeout in [routing:homepage]

Parameters

section	configuration section
option	Name of the option

Returns: Prefix as std::string

◆ get_option_milliseconds()

std::chrono::milliseconds mysql_harness::BasePluginConfig::get_option_milliseconds	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option,
		double	min_value = `0.0`,
		double	max_value = `std::numeric_limits<double>::max()`
	)		const

inline

Gets a number of milliseconds using the given option.

The expected option value is a string with floating point number in seconds (with '.' as a decimal separator) in standard or scientific notation

for value = "1.0" expected result is std::chrono:milliseconds(1000)
for value = "0.01" expected result is std::chrono:milliseconds(10)
for value = "1.6E-2" expected result is std::chrono:milliseconds(16)

Parameters

section	Instance of ConfigSection
option	Option name in section
min_value	Minimum value
max_value	Maximum value

Returns: value converted to milliseconds

Exceptions

std::invalid_argument on errors

◆ get_option_no_default()

template<class Func >

decltype(auto) mysql_harness::BasePluginConfig::get_option_no_default	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option,
		Func &&	transformer
	)		const

inline

get option value.

gets the option from a config-section and converts it with a transformation function.

does not call get_default().

Parameters

section	configuration section
option	name of the option
transformer	transformation function. The signature of the transformation function should be equivalent to: (const std::string &value, const std::string &option_description) and returns the transformed value.

Returns: transformed value.

◆ get_option_string()

std::string mysql_harness::BasePluginConfig::get_option_string	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option
	)		const

inline

Gets value of given option as string.

Exceptions

option_not_present	if the required option is missing
option_empty	if the required option is present but empty

Parameters

section	Instance of ConfigSection
option	name of the option

Returns: Option value as std::string

◆ get_option_string_()

std::optional< std::string > mysql_harness::BasePluginConfig::get_option_string_	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option
	)		const

private

get value of an option from a config-section.

does not call get_default()

Returns: a value of the option if it exists.

◆ get_option_string_or_default_()

std::string mysql_harness::BasePluginConfig::get_option_string_or_default_	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option
	)		const

private

get value of an option from a config-section.

gets value from get_default() if the option-value is not present or empty.

Returns: a value of the option if it exists.

◆ get_section_name()

std::string mysql_harness::BasePluginConfig::get_section_name ( const mysql_harness::ConfigSection * section )

staticprotected

Generate the name for this configuration.

Parameters

section Instance of ConfigSection

Returns: the name for this configuration

◆ get_uint_option()

template<class T >

T mysql_harness::BasePluginConfig::get_uint_option	(	const mysql_harness::ConfigSection *	section,
		std::string_view	option,
		T	min_value = `0`,
		T	max_value = `std::numeric_limits<T>::max()`
	)		const

inline

Gets an unsigned integer using the given option.

Gets an unsigned integer using the given option. The type can be any unsigned integer type such as uint16_t.

The min_value argument can be used to set a minimum value for the option. For example, when 0 (zero) is not allowed, min_value can be set to 0. The maximum value is whatever the maximum of the use type is.

Throws std::invalid_argument on errors.

Parameters

section	Instance of ConfigSection
option	Option name in section
min_value	Minimum value
max_value	Maximum value

Returns: value read from the configuration

◆ is_required()

virtual bool mysql_harness::BasePluginConfig::is_required ( std::string_view option ) const

pure virtual

Returns whether the given option is required.

Returns: bool

Implemented in anonymous_namespace{http_auth_backend_plugin.cc}::PluginConfig, HttpAuthRealmPluginConfig, MetadataCachePluginConfig, PluginConfig, RestConnectionPoolPluginConfig, RestMetadataCachePluginConfig, RestRouterPluginConfig, RestRoutingPluginConfig, RoutingPluginConfig, ConnectionPoolPluginConfig, DestinationStatusPluginConfig, anonymous_namespace{logger_plugin.cc}::LoggingPluginConfig, anonymous_namespace{http_auth_backend_plugin.cc}::HtpasswdPluginConfig, HttpServerPluginConfig, IoPluginConfig, and RestApiPluginConfig.

◆ operator=() [1/2]

BasePluginConfig & mysql_harness::BasePluginConfig::operator= ( BasePluginConfig && )

default

◆ operator=() [2/2]

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

default

Member Data Documentation

◆ section_name_

std::string mysql_harness::BasePluginConfig::section_name_

private

Name of the section.

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

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

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ BasePluginConfig() [1/4]

◆ BasePluginConfig() [2/4]

◆ BasePluginConfig() [3/4]

◆ ~BasePluginConfig()

◆ BasePluginConfig() [4/4]

Member Function Documentation

◆ get_default()

◆ get_option()

◆ get_option_description()

◆ get_option_milliseconds()

◆ get_option_no_default()

◆ get_option_string()

◆ get_option_string_()

◆ get_option_string_or_default_()

◆ get_section_name()

◆ get_uint_option()

◆ is_required()

◆ operator=() [1/2]

◆ operator=() [2/2]

Member Data Documentation

◆ section_name_