Data provider class. More...

#include <DataProvider.qc.dox.h>

Static Public Member Methods
static bool	getAutoConfig ()
	Returns the auto config flag.

static *AbstractDataProviderFactory	getFactory (string name)
	Returns the given data provider factory or NOTHING if not present.

static AbstractDataProviderFactory	getFactoryEx (string name)
	Returns the given data provider factory or throws an exception if not present. More...

static AbstractDataProvider	getFactoryObject (string path, *hash< auto > options)
	Returns a data provider object from the given factory, created with the given constructor options. More...

static AbstractDataProvider	getFactoryObjectFromExample (string path, data example, *hash< auto > options)
	Returns a data provider object from the given factory, created with the given options and example data. More...

static AbstractDataProvider	getFactoryObjectFromExample (string path, InputStream example, *hash< auto > options)
	Returns a data provider object from the given factory, created with the given options and example data. More...

static AbstractDataProvider	getFactoryObjectFromString (string name)
	Returns a data provider object from the given factory string. More...

static AbstractDataProvider	getFactoryObjectFromStringUseEnv (string name)
	Returns a data provider object from the given factory string using environment variables to find the factory. More...

static AbstractDataProvider	getFactoryObjectWithTemplate (string path, hash< auto > template_options, hash< auto > options)
	Returns a data provider object from the given factory, created with the given constructor options. More...

static hash< auto >	getInfoAsData (hash< auto > info0, *bool with_type_info)
	Converts an info hash with objects to a hash with string descriptions instead of the objects. More...

static list< string >	getPathList (string path)
	Returns a list of strings in a path separated by "/" characters.

static *AbstractDataProviderType	getType (string path)
	Returns the given data provider type or NOTHING if not present. More...

static DataProviderTypeCache	getTypeCache ()
	Returns the data provider cache.

static AbstractDataProviderType	getTypeEx (string path)
	Returns the given data provider type or throws an exception if not present. More...

static DataProviderTypeEntry	getTypeRoot ()
	Returns the root type entry.

static *list< string >	listFactories ()
	Returns a list of registered data provider factories.

static *list< string >	listTypes ()
	Returns a list of registered data provider type paths. More...

static	loadProvidersFromEnvironment ()
	Loads data providers from the environment.

static	loadTypesFromEnvironment ()
	Loads data types from the environment.

static	lockAllTypes ()
	Locks all types.

static	registerFactory (AbstractDataProviderFactory factory)
	Register a new data provider factory. More...

static	registerKnownFactories ()
	Registers all known data provider factories.

static	registerKnownTypes ()
	Registers all known data provider types.

static	registerType (string path, AbstractDataProviderType type)
	Register a new data provider type. More...

static	setAutoConfig ()
	Sets the flag that allows for automatic configuration from environment variables. More...

static *AbstractDataProvider	tryLoadProviderForConnectionFromEnv (string name)
	Tries to load a data provider from the environment from the connection name.

Public Attributes
const	FactoryMap
	Map of known data provider factory names to modules.

const	FactoryModuleList = keys (map {$1: True}, FactoryMap.iterator())
	List of data provider factory modules.

const	TypeMap
	Map of known type path prefixes to modules.

Static Private Member Methods
static bool	checkInjection (object obj, hash< string, string > module_map)
	Check if the object is from a module that has been subject to dependency injections.

static	checkRequest ()
	Sets the env_config_locked variable if not already set.

static *object	checkSymbol (hash< SymbolInfo > info)
	Returns True if an object of the given type has been loaded.

static Mutex	factory_cache_lock ()
	data provider factory cache lock

static hash< FactoryInfo >	getFactoryInfoFromString (string name)
	Returns a hash of factory information from a string.

static *object	loadFromEnvironment (string func, string type, *hash< SymbolInfo > info)
	Loads modules from the QORE_DATA_PROVIDERS environment variable.

static *string	tryGetFactoryModuleName (string name)
	Tries to load a module corresponding to the given factory.

static *string	tryGetModuleName (string name, string func, string type)
	Tries to load a module corresponding to the given factory.

static *string	tryGetTypeModuleName (string name)
	Tries to load a module corresponding to the given factory.

static bool	tryLoad (string module_str, *bool verbose)
	Try to load the given module.

static *DataProviderTypeEntry	tryLoadTypeFromPath (list< string > type_path)
	Tries to load the given type.

static DataProviderTypeCache	type_cache ()
	data provider data type cache

Static Private Attributes
static bool	allow_env_config = False
	flag to allow automatic configuration from environment variables More...

static bool	env_config_locked = False
	flag that locks the allow_env_config var

static hash< string, AbstractDataProviderFactory >	factory_cache
	data provider factory cache

static hash< string, string >	factory_module_map
	data provider factory module map

static hash< string, bool >	mod_map
	set of module already loaded

static hash< string, string >	type_module_map
	data provider type module map

Detailed Description

Data provider class.

Member Function Documentation

◆ getFactoryEx()

static AbstractDataProviderFactory DataProvider::DataProvider::getFactoryEx ( string name )

static

Returns the given data provider factory or throws an exception if not present.

Parameters

name	the name of the data provider to retrieve

Returns: the given data provider; an exception is thrown if the data provide is unknown

Exceptions

PROVIDER-ERROR the given provider is unknown

◆ getFactoryObject()

static AbstractDataProvider DataProvider::DataProvider::getFactoryObject	(	string	path,
		*hash< auto >	options
	)

static

Returns a data provider object from the given factory, created with the given constructor options.

Parameters

path	the `"/"-separated` path to the target data provider; the first element is the factory name
options	factory creation options

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

◆ getFactoryObjectFromExample() [1/2]

static AbstractDataProvider DataProvider::DataProvider::getFactoryObjectFromExample	(	string	path,
		data	example,
		*hash< auto >	options
	)

static

Returns a data provider object from the given factory, created with the given options and example data.

Parameters

path	the `"/"-separated` path to the target data provider; the first element is the factory name
example	example data to process
options	factory creation options

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

Since: DataProvider 2.7.1

◆ getFactoryObjectFromExample() [2/2]

static AbstractDataProvider DataProvider::DataProvider::getFactoryObjectFromExample	(	string	path,
		InputStream	example,
		*hash< auto >	options
	)

static

Returns a data provider object from the given factory, created with the given options and example data.

Parameters

path	the `"/"-separated` path to the target data provider; the first element is the factory name
example	example data to process
options	factory creation options

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

Since: DataProvider 2.7.1

◆ getFactoryObjectFromString()

static AbstractDataProvider DataProvider::DataProvider::getFactoryObjectFromString ( string name )

static

Returns a data provider object from the given factory string.

Factory options are given as string-formatted hash in curly brackets and child data providers are separated by forward slashes

Example:: DbDataProvider db = DataProvider::getFactoryObjectFromString("db{oracle:user/password@db}/my_table");

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

◆ getFactoryObjectFromStringUseEnv()

static AbstractDataProvider DataProvider::DataProvider::getFactoryObjectFromStringUseEnv ( string name )

static

Returns a data provider object from the given factory string using environment variables to find the factory.

Factory options are given as string-formatted hash in curly brackets and child data providers are separated by forward slashes

Example:: DbDataProvider db = DataProvider::getFactoryObjectFromStringUseEnv("db{oracle:user/password@db}/my_table");

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

◆ getFactoryObjectWithTemplate()

static AbstractDataProvider DataProvider::DataProvider::getFactoryObjectWithTemplate	(	string	path,
		*hash< auto >	template_options,
		*hash< auto >	options
	)

static

Returns a data provider object from the given factory, created with the given constructor options.

Parameters

path	the `"/"-separated` path to the target data provider; the first element is the factory name
template_options	options with templated values; only the keys in this hash are relevant, as they indicate options that will be present at a later time when their values can be derived; the values provided in this call are assumed to be in an implementation-dependent templated format and should be ignored
options	factory creation options

Exceptions

PROVIDER-ERROR the given provider factory or child provider is unknown

Since: DataProvider 2.7.1

◆ getInfoAsData()

static hash< auto > DataProvider::DataProvider::getInfoAsData	(	hash< auto >	info0,
		*bool	with_type_info
	)

static

Converts an info hash with objects to a hash with string descriptions instead of the objects.

Parameters

info0	the raw info with objects describing the types
with_type_info	if True then more type information will be returned in the response

◆ getType()

static *AbstractDataProviderType DataProvider::DataProvider::getType ( string path )

static

Returns the given data provider type or NOTHING if not present.

Parameters

path	a `"/"` separated path for the type; trailing path elements can be a path into fields

Returns: the given data provider type; NOTHING is returned if the type cannot be resolved

Note: types are stored based on the path provided which may differ from their type names (which may be generic and therefore not suitable for indexing)

◆ getTypeEx()

static AbstractDataProviderType DataProvider::DataProvider::getTypeEx ( string path )

static

Returns the given data provider type or throws an exception if not present.

Parameters

path	a `"/"` separated path for the type; trailing path elements can be a path into fields

Returns: the given data provider type; an exception is thrown if the data provide is unknown

Exceptions

PROVIDER-ERROR the given data provider type path is unknown

Note: types are stored based on the path provided which may differ from their type names (which may be generic and therefore not suitable for indexing)

◆ listTypes()

static *list< string > DataProvider::DataProvider::listTypes ( )

static

Returns a list of registered data provider type paths.

Note: types are stored based on the path provided which may differ from their type names (which may be generic and therefore not suitable for indexing)

◆ registerFactory()

static DataProvider::DataProvider::registerFactory ( AbstractDataProviderFactory factory )

static

Register a new data provider factory.

Parameters

factory the new data provider factory

Exceptions

PROVIDER-ERROR the given provider has already been registered

◆ registerType()

static DataProvider::DataProvider::registerType	(	string	path,
		AbstractDataProviderType	type
	)

static

Register a new data provider type.

Parameters

path	a `"/"` separated path for the type; this is the lookup index
type	the new data provider type

Exceptions

PROVIDER-ERROR the given provider has already been registered

Note: types are stored based on the path provided which may differ from their type names (which may be generic and therefore not suitable for indexing)

◆ setAutoConfig()

static DataProvider::DataProvider::setAutoConfig ( )

static

Sets the flag that allows for automatic configuration from environment variables.

Must be called before any requests for types or factories are made, or an exception is raised

Exceptions

DATA-PROVIDER-ERROR cannot call this method after requests for types or factories are made

Member Data Documentation

◆ allow_env_config

bool DataProvider::DataProvider::allow_env_config = False

staticprivate

flag to allow automatic configuration from environment variables

must be set before any requests for types or factories are made

Static Public Member Methods

Public Attributes

Static Private Member Methods

Static Private Attributes

Detailed Description

Member Function Documentation

◆ getFactoryEx()

◆ getFactoryObject()

◆ getFactoryObjectFromExample() [1/2]

◆ getFactoryObjectFromExample() [2/2]

◆ getFactoryObjectFromString()

◆ getFactoryObjectFromStringUseEnv()

◆ getFactoryObjectWithTemplate()

◆ getInfoAsData()

◆ getType()

◆ getTypeEx()

◆ listTypes()

◆ registerFactory()

◆ registerType()

◆ setAutoConfig()

Member Data Documentation

◆ allow_env_config