OSID - osid.journaling.JournalNotificationSession Service Interface Definition

Interface	osid.journaling.JournalNotificationSession
Implements	`osid.OsidSession`
Description	This session defines methods to receive notifications on adds/changes to `Journal` objects. 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 is closed. Notifications are triggered with changes to the `Journal` object itself. Adding and removing entries result in notifications available from the notification session for journal entries.
Method	canRegisterForJournalNotifications
Description	Tests if this user can register for `Journal` 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	reliableJournalNotifications
Description	Reliable notifications are desired. In reliable mode, notifications are to be acknowledged using `acknowledgeJournalNotification()` .
Compliance	`mandatory`		This method is must be implemented.
Method	unreliableJournalNotifications
Description	Unreliable notifications are desired. In unreliable mode, notifications do not need to be acknowledged.
Compliance	`mandatory`		This method is must be implemented.
Method	acknowledgeJournalNotification
Description	Acknowledge a journal 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	registerForNewJournals
Description	Register for notifications of new journals. `JournalReceiver.newJournals()` is invoked when a new `Journal` is created.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedJournals
Description	Registers for notification of updated journals. `JournalReceiver.changedJournals()` is invoked when a journal is changed.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedJournal
Description	Registers for notification of an updated journal. `JournalReceiver.changedJournals()` is invoked when the specified journal is changed.
Parameters	`osid.id.Id`	`journalId`	the `Id` of the `Journal` to monitor
Errors	NULL_ARGUMENT		`journalId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForDeletedJournals
Description	Registers for notification of deleted journals. `JournalReceiver.deletedJournals()` is invoked when a journal is deleted.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForDeletedJournal
Description	Registers for notification of a deleted journal. `JournalReceiver.deletedJournals()` is invoked when the specified journal is deleted.
Parameters	`osid.id.Id`	`journalId`	the `Id` of the `Journal` to monitor
Errors	NULL_ARGUMENT		`journalId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedJournalHierarchy
Description	Registers for notification of an updated journal hierarchy structure. `JournalReceiver.changedChildOfJournals()` is invoked when a node experiences a change in its children.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedJournalHierarchyForAncestors
Description	Registers for notification of an updated journal hierarchy structure. `JournalReceiver.changedChildOfJournals()` is invoked when the specified node or any of its ancestors experiences a change in its children.
Parameters	`osid.id.Id`	`journalId`	the `Id` of the `Journal` node to monitor
Errors	NULL_ARGUMENT		`journalId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedJournalHierarchyForDescendants
Description	Registers for notification of an updated journal hierarchy structure. `JournalReceiver.changedChildOfJournals()` is invoked when the specified node or any of its descendants experiences a change in its children.
Parameters	`osid.id.Id`	`journalId`	the `Id` of the `Journal` node to monitor
Errors	NULL_ARGUMENT		`journalId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.