DataProvider::Observable Class Reference

This class represents an observable subject that will notify all of its registered observers. More...

Inheritance diagram for DataProvider::Observable:

Public Member Methods
bool	deregisterObserver (object observer)
	The method deregisters the given observer. More...
bool	deregisterObserver (Observer observer)
	The method deregisters the given observer. More...
	log (int level, string fmt)
	Reimplement this method to implement logging. More...
	notifyObservers (string event_id, hash< auto > data_)
	The method notifies all subscribed observers. More...
	registerObserver (object observer)
	The method registers the given observer. More...
	registerObserver (Observer observer)
	The method registers the given observer. More...
	registerObserverWithFilter (object observer, AbstractEventFilter filter)
	The method registers the given observer. More...
	registerObserverWithFilter (Observer observer, AbstractEventFilter filter)
	The method registers the given observer. More...

Private Member Methods
hash< ObserverEventInfo >	registerObserverEventsArgs (hash< ObserverEventInfo > info, list< auto > events)
	Registers observer events.

Private Attributes
hash< string, hash< ObserverEventInfo > >	observer_map
	maps from object hash -> object

Detailed Description

This class represents an observable subject that will notify all of its registered observers.

Member Function Documentation

deregisterObserver() [1/2]

bool DataProvider::Observable::deregisterObserver

(

object

observer

)

The method deregisters the given observer.

Parameters

observer

the observer to be deregistered

Returns

True if found otherwise False

Note

this variant is meant for observer objects implemented in other languages

deregisterObserver() [2/2]

bool DataProvider::Observable::deregisterObserver

(

Observer

observer

)

The method deregisters the given observer.

Parameters

observer

the observer to be deregistered

Returns

True if found otherwise False

log()

DataProvider::Observable::log	(	int	level,
		string	fmt
	)

Reimplement this method to implement logging.

Parameters

level	the Logger level
fmt	the format string
...	any arguments for any format placeholders in fmt

notifyObservers()

DataProvider::Observable::notifyObservers	(	string	event_id,
		hash< auto >	data_
	)

The method notifies all subscribed observers.

Parameters

event_id	unique ID identifying an event
data_	hash representing new data to be passed to observers' update() methods

registerObserver() [1/2]

DataProvider::Observable::registerObserver

(

object

observer

)

The method registers the given observer.

Parameters

observer	the observer to be registered
...	event IDs for notifications; if no additional arguments are passed, then the observer is notified for all events

Note

this variant is meant for observer objects implemented in other languages

registerObserver() [2/2]

DataProvider::Observable::registerObserver

(

Observer

observer

)

The method registers the given observer.

Parameters

observer	the observer to be registered
...	event IDs for notifications; if no additional arguments are passed, then the observer is notified for all events

Exceptions

EVENT-ERROR

type error; additional argument is not a string event ID

registerObserverWithFilter() [1/2]

DataProvider::Observable::registerObserverWithFilter	(	object	observer,
		AbstractEventFilter	filter
	)

The method registers the given observer.

Parameters

observer	the observer to be registered
filter	the filter object for events
...	event IDs for notifications; if no additional arguments are passed, then the observer is notified for all events

Note

this variant is meant for observer objects implemented in other languages

registerObserverWithFilter() [2/2]

DataProvider::Observable::registerObserverWithFilter	(	Observer	observer,
		AbstractEventFilter	filter
	)

The method registers the given observer.

Parameters

observer	the observer to be registered
filter	the filter object for events
...	event IDs for notifications; if no additional arguments are passed, then the observer is notified for all events

Exceptions

EVENT-ERROR

type error; additional argument is not a string event ID