#include <dest_metadata_cache.h>

Inheritance diagram for DestMetadataCacheManager:

Public Types
enum	ServerRole { Primary , Secondary , PrimaryAndSecondary }

Public Types inherited from DestinationManager
using	DestVector = std::vector< mysql_harness::Destination >

Public Member Functions
	DestMetadataCacheManager (net::io_context &io_ctx, MySQLRoutingContext &routing_ctx, const std::string &metadata_cache, const mysqlrouter::URIQuery &query, const ServerRole role, metadata_cache::MetadataCacheAPIBase *cache_api=metadata_cache::MetadataCacheAPI::instance())
	Constructor. More...

	DestMetadataCacheManager (const DestMetadataCacheManager &other)=delete
	Copy constructor. More...

	DestMetadataCacheManager (DestMetadataCacheManager &&)=delete
	Move constructor. More...

DestMetadataCacheManager &	operator= (const DestMetadataCacheManager &)=delete
	Copy assignment. More...

DestMetadataCacheManager &	operator= (DestMetadataCacheManager &&)=delete
	Move assignment. More...

	~DestMetadataCacheManager () override

void	start (const mysql_harness::PluginFuncEnv *env) override
	Start the destination. More...

mysqlrouter::ServerMode	purpose () const override

stdx::expected< void, std::error_code >	init_destinations (const routing_guidelines::Session_info &session_info) override
	Set up destination manager, prepare the destinations. More...

metadata_cache::MetadataCacheAPIBase *	cache_api ()

bool	refresh_destinations (const routing_guidelines::Session_info &session_info) override
	refresh destinations. More...

void	handle_sockets_acceptors () override
	Trigger listening socket acceptors state handler based on the destination type. More...

std::unique_ptr< Destination >	get_next_destination (const routing_guidelines::Session_info &session_info) override
	Get destination that should be used for connection attempt. More...

std::vector< mysql_harness::Destination >	get_destination_candidates () const override
	Get addresses of all nodes that are a possible destination candidates. More...

void	connect_status (std::error_code ec) override

bool	has_read_write () const override
	Check if there are read-write destinations that could be used. More...

bool	has_read_only () const override
	Check if there are read-only destinations that could be used. More...

routing_guidelines::Routing_guidelines_engine::RouteChanges	update_routing_guidelines (const std::string &routing_guidelines_document)
	Update routing guidelines engine with a new routing guideline. More...

void	clear_internal_state ()
	Clear internal state (indexes, last connection status etc). More...

bool	is_dynamic () override
	Specifies if the destination addresses can be added/removed from the set. More...

std::string	get_dynamic_plugin_name () override

Public Member Functions inherited from DestinationManager
	DestinationManager (net::io_context &io_ctx, MySQLRoutingContext &routing_ctx)
	Default constructor. More...

virtual	~DestinationManager ()=default
	Destructor. More...

	DestinationManager (const DestinationManager &other)=delete

	DestinationManager (DestinationManager &&other)=delete

DestinationManager &	operator= (const DestinationManager &other)=delete

DestinationManager &	operator= (DestinationManager &&other)=delete

bool	routing_guidelines_session_rand_used () const
	Check if routing guidelines uses $.session.rand as a match criterion. More...

routing_guidelines::Router_info	get_router_info () const
	Get information about this given Router instance. More...

Public Member Functions inherited from DestinationNodesStateNotifier
virtual	~DestinationNodesStateNotifier ()=default

AllowedNodesChangeCallbacksListIterator	register_allowed_nodes_change_callback (const AllowedNodesChangedCallback &clb)
	Registers the callback for notification on the change in the state if the destination nodes. More...

void	unregister_allowed_nodes_change_callback (const AllowedNodesChangeCallbacksListIterator &it)
	Unregisters the callback registered with register_allowed_nodes_change_callback(). More...

void	register_start_router_socket_acceptor (const StartSocketAcceptorCallback &clb)
	Registers the callback for notification that the routing socket acceptor should accept new connections. More...

void	unregister_start_router_socket_acceptor ()
	Unregisters the callback registered with register_start_router_socket_acceptor(). More...

void	register_stop_router_socket_acceptor (const StopSocketAcceptorCallback &clb)
	Registers the callback for notification that the routing socket acceptor should stop accepting new connections. More...

void	unregister_stop_router_socket_acceptor ()
	Unregisters the callback registered with register_stop_router_socket_acceptor(). More...

void	register_md_refresh_callback (const MetadataRefreshCallback &callback)
	Registers a callback that is going to be used on metadata refresh. More...

void	unregister_md_refresh_callback ()
	Unregisters the callback registered with register_md_refresh_callback(). More...

void	register_query_quarantined_destinations (const QueryQuarantinedDestinationsCallback &clb)
	Registers a callback that could be used for checking if the provided destination candidate is currently quarantined. More...

void	unregister_query_quarantined_destinations ()
	Unregisters the callback registered with register_query_quarantined_destinations(). More...

Public Member Functions inherited from metadata_cache::ClusterStateListenerInterface
	ClusterStateListenerInterface ()=default

	ClusterStateListenerInterface (const ClusterStateListenerInterface &)=delete

ClusterStateListenerInterface &	operator= (const ClusterStateListenerInterface &)=delete

virtual	~ClusterStateListenerInterface ()

Public Member Functions inherited from metadata_cache::MetadataRefreshListenerInterface
	MetadataRefreshListenerInterface ()=default

	MetadataRefreshListenerInterface (const MetadataRefreshListenerInterface &)=default

	MetadataRefreshListenerInterface (MetadataRefreshListenerInterface &&)=default

MetadataRefreshListenerInterface &	operator= (const MetadataRefreshListenerInterface &)=default

MetadataRefreshListenerInterface &	operator= (MetadataRefreshListenerInterface &&)=default

virtual	~MetadataRefreshListenerInterface ()=default

Public Member Functions inherited from metadata_cache::AcceptorUpdateHandlerInterface
	AcceptorUpdateHandlerInterface ()=default

	AcceptorUpdateHandlerInterface (const AcceptorUpdateHandlerInterface &)=default

AcceptorUpdateHandlerInterface &	operator= (const AcceptorUpdateHandlerInterface &)=default

	AcceptorUpdateHandlerInterface (AcceptorUpdateHandlerInterface &&)=default

AcceptorUpdateHandlerInterface &	operator= (AcceptorUpdateHandlerInterface &&)=default

virtual	~AcceptorUpdateHandlerInterface ()=default

Private Types
enum class	ConnectionStatus { InProgress , Failed , NotSet }
	Status of a last connection. More...

Private Member Functions
std::unordered_map< std::string, net::ip::address >	resolve_routing_guidelines_hostnames (const std::vector< routing_guidelines::Resolve_host > &hostnames)
	Resolve hostnames used in routing guidelines document. More...

void	prepare_destination_groups ()
	Fill each destination group with destination candidates, according to the routing guideline that is being used. More...

bool	change_group ()
	Change destination group that is currently being used. More...

void	validate_current_sharing_settings (std::string_view route_name, Destination *dest) const
	If the routing guideline enables the connection sharing then it validates if the sharing prerequisites are met and it could be used. More...

std::unique_ptr< Destination >	get_next_destination_impl ()

void	set_last_connect_successful (const bool state)
	Set information if the last connection was successful. More...

std::vector< routing_guidelines::Server_info >	get_nodes_allowed_by_routing_guidelines () const
	Get addresses of nodes allowed by the auto-generated routing guideline. More...

std::vector< routing_guidelines::Server_info >	get_all_nodes () const
	Get addresses of all nodes in the topology. More...

void	init ()
	Initializes. More...

std::vector< routing_guidelines::Server_info >	get_nodes_from_topology (const metadata_cache::ClusterTopology &cluster_topology, const bool drop_all_hidden) const
	Get destination candidates details from the given topology. More...

std::vector< routing_guidelines::Server_info >	get_new_connection_nodes () const
	Get information about nodes available for new connections. More...

std::vector< routing_guidelines::Server_info >	get_old_connection_nodes () const
	Get information about nodes available for existing connections. More...

std::unique_ptr< Destination >	get_last_used_destination () const override
	Get a destination candidate that was already selected by the Destination Manager, this will not balance destinations or change the Destination Manager internal state. More...

void	on_instances_change (const bool md_servers_reachable)

void	subscribe_for_metadata_cache_changes ()

void	subscribe_for_acceptor_handler ()

void	subscribe_for_md_refresh_handler ()

void	notify_instances_changed (const bool md_servers_reachable, const uint64_t) noexcept override
	Callback function that is called when state of cluster is changed. More...

bool	update_socket_acceptor_state () noexcept override
	Callback function that is called when the state of the sockets acceptors is handled during the metadata refresh. More...

void	on_md_refresh (const bool instances_changed) override
	Callback that is going to be used on each metadata refresh. More...

Private Attributes
const std::string	cache_name_
	The Metadata Cache to use. More...

const mysqlrouter::URIQuery	uri_query_
	Query part of the URI given as destination in the configuration. More...

ServerRole	server_role_

metadata_cache::MetadataCacheAPIBase *	cache_api_

bool	subscribed_for_metadata_cache_changes_ {false}

bool	disconnect_on_promoted_to_primary_ {false}

bool	disconnect_on_metadata_unavailable_ {false}

std::shared_ptr< routing_guidelines::Routing_guidelines_engine >	routing_guidelines_ {nullptr}
	Routing guideline engine. More...

Protocol::Type	protocol_
	Protocol for the destination. More...

routing::RoutingStrategy	strategy_
	Routing strategy that is used within the currently used destination group. More...

std::string	last_server_uuid_
	UUID of a last destination returned by get_next_destination(), used in wait for primary failover mechanism. More...

routing_guidelines::Routing_guidelines_engine::Route_classification	route_info_
	Guidelines route which is designated by the guidelines engine to handle connection. More...

std::vector< std::vector< Destination > >	destination_candidates_
	Destination candidates that are going to be used to create destination groups. More...

uint16_t	current_destination_group_index_ {0}
	Index of the currently used destination group. More...

uint16_t	current_group_position_ {0}
	Index of the current position within a destination group. More...

std::map< uint16_t, uint16_t >	stored_destination_indexes_

std::atomic< ConnectionStatus >	last_connection_status_
	Information about previous connection status. More...

uint16_t	available_dests_in_group_ {0}
	How many available destinations are in the currently used destination group. More...

bool	has_read_write_ {false}
	Destination manager contains read-write destination candidates. More...

bool	has_read_only_ {false}
	Destination manager contains read-only destination candidates. More...

Destination	destination_
	Destination thats used for the connection. More...

Additional Inherited Members
Protected Member Functions inherited from DestinationManager
const MySQLRoutingContext &	get_routing_context () const

Protected Attributes inherited from DestinationManager
net::io_context &	io_ctx_

MySQLRoutingContext &	routing_ctx_

std::mutex	state_mtx_

std::error_code	last_ec_

Protected Attributes inherited from DestinationNodesStateNotifier
AllowedNodesChangeCallbacksList	allowed_nodes_change_callbacks_

MetadataRefreshCallback	md_refresh_callback_

StartSocketAcceptorCallback	start_router_socket_acceptor_callback_

StopSocketAcceptorCallback	stop_router_socket_acceptor_callback_

QueryQuarantinedDestinationsCallback	query_quarantined_destinations_callback_

std::mutex	allowed_nodes_change_callbacks_mtx_

std::mutex	md_refresh_callback_mtx_

std::mutex	socket_acceptor_handle_callbacks_mtx

std::mutex	query_quarantined_destinations_callback_mtx_

Member Enumeration Documentation

◆ ConnectionStatus

enum class DestMetadataCacheManager::ConnectionStatus

strongprivate

Status of a last connection.

Enumerator
InProgress
Failed
NotSet

◆ ServerRole

enum DestMetadataCacheManager::ServerRole

Enumerator
Primary
Secondary
PrimaryAndSecondary

Constructor & Destructor Documentation

◆ DestMetadataCacheManager() [1/3]

DestMetadataCacheManager::DestMetadataCacheManager	(	net::io_context &	io_ctx,
		MySQLRoutingContext &	routing_ctx,
		const std::string &	metadata_cache,
		const mysqlrouter::URIQuery &	query,
		const ServerRole	role,
		metadata_cache::MetadataCacheAPIBase *	cache_api = `metadata_cache::MetadataCacheAPI::instance()`
	)

Constructor.

◆ DestMetadataCacheManager() [2/3]

DestMetadataCacheManager::DestMetadataCacheManager ( const DestMetadataCacheManager & other )

delete

Copy constructor.

◆ DestMetadataCacheManager() [3/3]

DestMetadataCacheManager::DestMetadataCacheManager ( DestMetadataCacheManager && )

delete

Move constructor.

◆ ~DestMetadataCacheManager()

DestMetadataCacheManager::~DestMetadataCacheManager ( )

override

Member Function Documentation

◆ cache_api()

metadata_cache::MetadataCacheAPIBase * DestMetadataCacheManager::cache_api ( )

inline

◆ change_group()

bool DestMetadataCacheManager::change_group ( )

private

Change destination group that is currently being used.

This happens if there was a connection error and current group could not provide a destination candidate.

Return values

true	successful group change
false	unsuccessful group change

◆ clear_internal_state()

void DestMetadataCacheManager::clear_internal_state ( )

Clear internal state (indexes, last connection status etc).

Used when guidelines are updated.

◆ connect_status()

void DestMetadataCacheManager::connect_status ( std::error_code ec )

overridevirtual

Implements DestinationManager.

◆ get_all_nodes()

std::vector< routing_guidelines::Server_info > DestMetadataCacheManager::get_all_nodes ( ) const

private

Get addresses of all nodes in the topology.

◆ get_destination_candidates()

std::vector< mysql_harness::Destination > DestMetadataCacheManager::get_destination_candidates ( ) const

overridevirtual

Get addresses of all nodes that are a possible destination candidates.

Implements DestinationManager.

◆ get_dynamic_plugin_name()

std::string DestMetadataCacheManager::get_dynamic_plugin_name ( )

overridevirtual

Reimplemented from DestinationNodesStateNotifier.

◆ get_last_used_destination()

std::unique_ptr< Destination > DestMetadataCacheManager::get_last_used_destination ( ) const

inlineoverrideprivatevirtual

Get a destination candidate that was already selected by the Destination Manager, this will not balance destinations or change the Destination Manager internal state.

Implements DestinationManager.

◆ get_new_connection_nodes()

std::vector< routing_guidelines::Server_info > DestMetadataCacheManager::get_new_connection_nodes ( ) const

private

Get information about nodes available for new connections.

◆ get_next_destination()

std::unique_ptr< Destination > DestMetadataCacheManager::get_next_destination ( const routing_guidelines::Session_info & )

overridevirtual

Get destination that should be used for connection attempt.

It uses routing strategies and internal information (last used indexes, failed attempt information) for destination selection.

Returns: Destination candidate used for connection attempt.

Implements DestinationManager.

◆ get_next_destination_impl()

std::unique_ptr< Destination > DestMetadataCacheManager::get_next_destination_impl ( )

private

◆ get_nodes_allowed_by_routing_guidelines()

std::vector< routing_guidelines::Server_info > DestMetadataCacheManager::get_nodes_allowed_by_routing_guidelines ( ) const

private

Get addresses of nodes allowed by the auto-generated routing guideline.

Should not be called when user-provided guideline is used as in such case it might be impossible to determine the list upfront (matching criteria might depend on source IP info for example).

◆ get_nodes_from_topology()

std::vector< routing_guidelines::Server_info > DestMetadataCacheManager::get_nodes_from_topology	(	const metadata_cache::ClusterTopology &	cluster_topology,
		const bool	drop_all_hidden
	)		const

private

Get destination candidates details from the given topology.

Parameters

cluster_topology	topology of the cluster
drop_all_hidden	shoud the hidden nodes be included in the result

Returns: list of destination candidates

◆ get_old_connection_nodes()

std::vector< routing_guidelines::Server_info > DestMetadataCacheManager::get_old_connection_nodes ( ) const

private

Get information about nodes available for existing connections.

◆ handle_sockets_acceptors()

void DestMetadataCacheManager::handle_sockets_acceptors ( )

inlineoverridevirtual

Trigger listening socket acceptors state handler based on the destination type.

Implements DestinationManager.

◆ has_read_only()

bool DestMetadataCacheManager::has_read_only ( ) const

inlineoverridevirtual

Check if there are read-only destinations that could be used.

Implements DestinationManager.

◆ has_read_write()

bool DestMetadataCacheManager::has_read_write ( ) const

inlineoverridevirtual

Check if there are read-write destinations that could be used.

Implements DestinationManager.

◆ init()

void DestMetadataCacheManager::init ( )

private

Initializes.

This method initialized the object. It goes of the URI query information and sets members accordingly.

◆ init_destinations()

stdx::expected< void, std::error_code > DestMetadataCacheManager::init_destinations ( const routing_guidelines::Session_info & session_info )

overridevirtual

Set up destination manager, prepare the destinations.

Returns: error code on failure

Implements DestinationManager.

◆ is_dynamic()

bool DestMetadataCacheManager::is_dynamic ( )

inlineoverridevirtual

Specifies if the destination addresses can be added/removed from the set.

NOTE: the sequence of nodes may change.

Reimplemented from DestinationNodesStateNotifier.

◆ notify_instances_changed()

void DestMetadataCacheManager::notify_instances_changed	(	const bool	md_servers_reachable,
		const uint64_t	view_id
	)

overrideprivatevirtualnoexcept

Callback function that is called when state of cluster is changed.

Parameters

md_servers_reachable	true if metadata changed, false if metadata unavailable
view_id	current metadata view_id in case of ReplicaSet cluster

Implements metadata_cache::ClusterStateListenerInterface.

◆ on_instances_change()

void DestMetadataCacheManager::on_instances_change ( const bool md_servers_reachable )

private

◆ on_md_refresh()

void DestMetadataCacheManager::on_md_refresh ( const bool instances_changed )

overrideprivatevirtual

Callback that is going to be used on each metadata refresh.

Parameters

[in] instances_changed Informs if the cluster topology has changed since last md refresh.

Implements metadata_cache::MetadataRefreshListenerInterface.

◆ operator=() [1/2]

DestMetadataCacheManager & DestMetadataCacheManager::operator= ( const DestMetadataCacheManager & )

delete

Copy assignment.

◆ operator=() [2/2]

DestMetadataCacheManager & DestMetadataCacheManager::operator= ( DestMetadataCacheManager && )

delete

Move assignment.

◆ prepare_destination_groups()

void DestMetadataCacheManager::prepare_destination_groups ( )

private

Fill each destination group with destination candidates, according to the routing guideline that is being used.

For example given the group setting [[d1,d2], [d3]] and d1 containing 127.0.0.1 d2 containing 127.0.1.1 127.0.1.2 d3 containing 127.0.2.1 It will create two destination groups 1) [127.0.0.1, 127.0.1.1, 127.0.1.2] 2) [127.0.2.1] Where group 2) is a backup destination group.

◆ purpose()

mysqlrouter::ServerMode DestMetadataCacheManager::purpose ( ) const

inlineoverridevirtual

Reimplemented from DestinationManager.

◆ refresh_destinations()

bool DestMetadataCacheManager::refresh_destinations ( const routing_guidelines::Session_info & )

overridevirtual

refresh destinations.

should be called after connecting to all destinations failed.

Return values

true	refresh suceeded, there are destinations that could be used.
false	refresh failed, there are no destinations that could be used.

Implements DestinationManager.

◆ resolve_routing_guidelines_hostnames()

std::unordered_map< std::string, net::ip::address > DestMetadataCacheManager::resolve_routing_guidelines_hostnames ( const std::vector< routing_guidelines::Resolve_host > & hostnames )

private

Resolve hostnames used in routing guidelines document.

If hostname could be resolved to multiple addresses (with requested IP version) then only one of the addresses is used, with unspecified order.

Parameters

hostnames list of hostnames to be resolved, each host contain information about hostname and IP version which should be used.

Returns: hostname address pairs

◆ set_last_connect_successful()

void DestMetadataCacheManager::set_last_connect_successful ( const bool state )

private

Set information if the last connection was successful.

◆ start()

void DestMetadataCacheManager::start ( const mysql_harness::PluginFuncEnv * env )

overridevirtual

Start the destination.

It also overwrites parent class' DestinationManager::start(), which launches Quarantine. For Metadata Cache routing, we don't need it.

Parameters

env	pointer to the PluginFuncEnv object

Implements DestinationManager.

◆ subscribe_for_acceptor_handler()

void DestMetadataCacheManager::subscribe_for_acceptor_handler ( )

private

◆ subscribe_for_md_refresh_handler()

void DestMetadataCacheManager::subscribe_for_md_refresh_handler ( )

private

◆ subscribe_for_metadata_cache_changes()

void DestMetadataCacheManager::subscribe_for_metadata_cache_changes ( )

private

◆ update_routing_guidelines()

routing_guidelines::Routing_guidelines_engine::RouteChanges DestMetadataCacheManager::update_routing_guidelines ( const std::string & routing_guidelines_document )

Update routing guidelines engine with a new routing guideline.

If the new routing guideline is empty then auto-generated guideline is used. If the guidelines engine could not be updated then old guideline is preserved and used.

Returns: List of route names of the routes that have been updated.

◆ update_socket_acceptor_state()

bool DestMetadataCacheManager::update_socket_acceptor_state ( )

overrideprivatevirtualnoexcept

Callback function that is called when the state of the sockets acceptors is handled during the metadata refresh.

Implements metadata_cache::AcceptorUpdateHandlerInterface.

◆ validate_current_sharing_settings()

void DestMetadataCacheManager::validate_current_sharing_settings	(	std::string_view	route_name,
		Destination *	dest
	)		const

private

If the routing guideline enables the connection sharing then it validates if the sharing prerequisites are met and it could be used.

If not then connection sharing is disabled.

Parameters

route_name	name of the route that enables connection sharing
dest	destination candidate that is going to be used for connection.

Member Data Documentation

◆ available_dests_in_group_

uint16_t DestMetadataCacheManager::available_dests_in_group_ {0}

private

How many available destinations are in the currently used destination group.

◆ cache_api_

metadata_cache::MetadataCacheAPIBase* DestMetadataCacheManager::cache_api_

private

◆ cache_name_

const std::string DestMetadataCacheManager::cache_name_

private

The Metadata Cache to use.

cache_name_ is the the section key in the configuration of Metadata Cache.

For example, given following Metadata Cache configuration, cache_name_ will be set to "ham":

[metadata_cache.ham]
host = metadata.example.com

◆ current_destination_group_index_

uint16_t DestMetadataCacheManager::current_destination_group_index_ {0}

private

Index of the currently used destination group.

◆ current_group_position_

uint16_t DestMetadataCacheManager::current_group_position_ {0}

private

Index of the current position within a destination group.

◆ destination_

Destination DestMetadataCacheManager::destination_

private

Destination thats used for the connection.

◆ destination_candidates_

std::vector<std::vector<Destination> > DestMetadataCacheManager::destination_candidates_

private

Destination candidates that are going to be used to create destination groups.

◆ disconnect_on_metadata_unavailable_

bool DestMetadataCacheManager::disconnect_on_metadata_unavailable_ {false}

private

◆ disconnect_on_promoted_to_primary_

bool DestMetadataCacheManager::disconnect_on_promoted_to_primary_ {false}

private

◆ has_read_only_

bool DestMetadataCacheManager::has_read_only_ {false}

private

Destination manager contains read-only destination candidates.

◆ has_read_write_

bool DestMetadataCacheManager::has_read_write_ {false}

private

Destination manager contains read-write destination candidates.

◆ last_connection_status_

std::atomic<ConnectionStatus> DestMetadataCacheManager::last_connection_status_

private

Initial value:

{

ConnectionStatus::NotSet}

DestMetadataCacheManager::ConnectionStatus::NotSet

@ NotSet

Information about previous connection status.

◆ last_server_uuid_

std::string DestMetadataCacheManager::last_server_uuid_

private

UUID of a last destination returned by get_next_destination(), used in wait for primary failover mechanism.

◆ protocol_

Protocol::Type DestMetadataCacheManager::protocol_

private

Protocol for the destination.

◆ route_info_

routing_guidelines::Routing_guidelines_engine::Route_classification DestMetadataCacheManager::route_info_

private

Guidelines route which is designated by the guidelines engine to handle connection.

◆ routing_guidelines_

std::shared_ptr<routing_guidelines::Routing_guidelines_engine> DestMetadataCacheManager::routing_guidelines_ {nullptr}

private

Routing guideline engine.

◆ server_role_

ServerRole DestMetadataCacheManager::server_role_

private

◆ stored_destination_indexes_

std::map<uint16_t, uint16_t> DestMetadataCacheManager::stored_destination_indexes_

private

◆ strategy_

routing::RoutingStrategy DestMetadataCacheManager::strategy_

private

Routing strategy that is used within the currently used destination group.

◆ subscribed_for_metadata_cache_changes_

bool DestMetadataCacheManager::subscribed_for_metadata_cache_changes_ {false}

private

◆ uri_query_

const mysqlrouter::URIQuery DestMetadataCacheManager::uri_query_

private

Query part of the URI given as destination in the configuration.

For example, given following Metadata Cache configuration:

[routing:metadata_read_only]
..
destination =

metadata_cache:///cluster_name/replicaset_name?role=PRIMARY_AND_SECONDARY

The 'role' is part of uri_query_.

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

router/src/routing/src/dest_metadata_cache.h
router/src/routing/src/dest_metadata_cache.cc

Public Types

Public Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Member Enumeration Documentation

◆ ConnectionStatus

◆ ServerRole

Constructor & Destructor Documentation

◆ DestMetadataCacheManager() [1/3]

◆ DestMetadataCacheManager() [2/3]

◆ DestMetadataCacheManager() [3/3]

◆ ~DestMetadataCacheManager()

Member Function Documentation

◆ cache_api()

◆ change_group()

◆ clear_internal_state()

◆ connect_status()

◆ get_all_nodes()

◆ get_destination_candidates()

◆ get_dynamic_plugin_name()

◆ get_last_used_destination()

◆ get_new_connection_nodes()

◆ get_next_destination()

◆ get_next_destination_impl()

◆ get_nodes_allowed_by_routing_guidelines()

◆ get_nodes_from_topology()

◆ get_old_connection_nodes()

◆ handle_sockets_acceptors()

◆ has_read_only()

◆ has_read_write()

◆ init()

◆ init_destinations()

◆ is_dynamic()

◆ notify_instances_changed()

◆ on_instances_change()

◆ on_md_refresh()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ prepare_destination_groups()

◆ purpose()

◆ refresh_destinations()

◆ resolve_routing_guidelines_hostnames()

◆ set_last_connect_successful()

◆ start()

◆ subscribe_for_acceptor_handler()

◆ subscribe_for_md_refresh_handler()

◆ subscribe_for_metadata_cache_changes()

◆ update_routing_guidelines()

◆ update_socket_acceptor_state()

◆ validate_current_sharing_settings()

Member Data Documentation

◆ available_dests_in_group_

◆ cache_api_

◆ cache_name_

◆ current_destination_group_index_

◆ current_group_position_

◆ destination_

◆ destination_candidates_

◆ disconnect_on_metadata_unavailable_

◆ disconnect_on_promoted_to_primary_

◆ has_read_only_

◆ has_read_write_

◆ last_connection_status_

◆ last_server_uuid_

◆ protocol_

◆ route_info_

◆ routing_guidelines_

◆ server_role_

◆ stored_destination_indexes_

◆ strategy_

◆ subscribed_for_metadata_cache_changes_

◆ uri_query_