mysql_harness::EventStateTracker Class Reference

EventStateTracker singleton object keeps track of the current known state of selected event. More...

#include <event_state_tracker.h>

Public Types
enum class	EventId : size_t {   MetadataServerConnectedOk , MetadataRefreshOk , GRMemberConnectedOk , MetadataNodeInGR ,   GRNodeInMetadata , TargetClusterPresentInOptions , ClusterInvalidatedInMetadata , ClusterWasBootstrappedAgainstClusterset ,   NoRightsToUpdateRouterAttributes , NoGRQuorum }
	List of the events that can currently be tracked. More...

Public Member Functions
bool	state_changed (const int state, const EventId event_id, const std::string &additional_tag="")
	Returns information about the selected event state change (and sets the new state of event if changed). More...
void	remove_tag (const std::string &tag)
	Remove the state for a given tag for all event_id that it has registered. More...
void	clear ()
	Remove stored state for all events. More...

Static Public Member Functions
static EventStateTracker &	instance ()
	Get the singleton object of EventStateTracker. More...

Private Types
using	Key = std::pair< size_t, size_t >

Private Member Functions
	EventStateTracker ()=default
	EventStateTracker (const EventStateTracker &)=delete
EventStateTracker	operator= (const EventStateTracker &)=delete

Private Attributes
std::map< Key, int >	events_
std::mutex	events_mtx_

Detailed Description

EventStateTracker singleton object keeps track of the current known state of selected event.

Can be used to track the changes of the state of selected event (for conditional logging etc.)

Member Typedef Documentation

Key

using mysql_harness::EventStateTracker::Key = std::pair<size_t, size_t>

private

Member Enumeration Documentation

EventId

enum class mysql_harness::EventStateTracker::EventId : size_t

strong

List of the events that can currently be tracked.

Enumerator
MetadataServerConnectedOk
MetadataRefreshOk
GRMemberConnectedOk
MetadataNodeInGR
GRNodeInMetadata
TargetClusterPresentInOptions
ClusterInvalidatedInMetadata
ClusterWasBootstrappedAgainstClusterset
NoRightsToUpdateRouterAttributes
NoGRQuorum

Constructor & Destructor Documentation

EventStateTracker() [1/2]

mysql_harness::EventStateTracker::EventStateTracker ( )

privatedefault

EventStateTracker() [2/2]

mysql_harness::EventStateTracker::EventStateTracker ( const EventStateTracker &  )

privatedelete

Member Function Documentation

clear()

void mysql_harness::EventStateTracker::clear

(

)

Remove stored state for all events.

instance()

EventStateTracker & mysql_harness::EventStateTracker::instance ( )

static

Get the singleton object of EventStateTracker.

operator=()

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

privatedelete

remove_tag()

void mysql_harness::EventStateTracker::remove_tag

(

const std::string &

tag

)

Remove the state for a given tag for all event_id that it has registered.

Parameters

tag	tag of the events being removed

state_changed()

bool mysql_harness::EventStateTracker::state_changed	(	const int	state,
		const EventId	event_id,
		const std::string &	additional_tag = ""
	)

Returns information about the selected event state change (and sets the new state of event if changed).

Parameters

state	current state of the event
event_id	id of the event
additional_tag	optional tag

Returns

information about the event state change

Return values

true	the event state has changed since the last call
false	the event state has NOT changed since the last call

Member Data Documentation

events_

std::map<Key, int> mysql_harness::EventStateTracker::events_

private

events_mtx_

std::mutex mysql_harness::EventStateTracker::events_mtx_

private

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

• router/src/harness/include/mysql/harness/event_state_tracker.h
• router/src/harness/src/event_state_tracker.cc