OSID - osid.process.StateChangeNotificationSession Service Interface Definition

Interface	osid.process.StateChangeNotificationSession
Implements	`osid.OsidSession`
Description	This session defines methods to receive notifications on changes of object states. This session is intended for consumers needing to synchronize their state with this service without the use of polling. Notifications are cancelled when this session
Method	canRegisterForStateChangeNotifications
Description	Tests if this user can register for `State` notifications. A return of true does not guarantee successful authorization. A return of false indicates that it is known all methods in this session will result in a `PERMISSION_DENIED`. This is intended as a hint to an application that may opt not to offer notification operations.
Return	`boolean`		`false` if notification methods are not authorized, `true` otherwise
Compliance	`mandatory`		This method must be implemented.
Method	reliableStateChangeNotifications
Description	Reliable notifications are desired. In reliable mode, notifications are to be acknowledged using `acknowledgeStateChangeNotification()`.
Compliance	`mandatory`		This method is must be implemented.
Method	unreliableStateChangeNotifications
Description	Unreliable notifications are desired. In unreliable mode, notifications do not need to be acknowledged.
Compliance	`mandatory`		This method is must be implemented.
Method	acknowledgeStateChangeNotification
Description	Acknowledge a state change notification.
Parameters	`osid.id.Id`	`notificationId`	the `Id` of the notification
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedState
Description	Registers for notification of updated states. `StateChangeReceiver.changedState()` is invoked when a state is changed.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedState
Description	Registers for notification of an updated state. `StateChangeReceiver.changedState()` is invoked when the specified state is changed.
Parameters	`osid.id.Id`	`id`	the `Id` to monitor
Errors	NULL_ARGUMENT		`id` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.