OSID - osid.billing.ItemNotificationSession Service Interface Definition

Interface	osid.billing.ItemNotificationSession
Implements	`osid.OsidSession`
Used By	`osid.billing.BillingManager`
Used By	`osid.billing.BillingProxyManager`
Description	This session defines methods to receive notifications on adds/changes to `Items` in this `Business`. This also includes existing items that may appear or disappear due to changes in the `Business` hierarchy, 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. The two views defined in this session correspond to the views in the `ItemLookupSession`.
Method	getBusinessId
Description	Gets the `Business` `Id` associated with this session.
Return	`osid.id.Id`		the `Business Id` associated with this session
Compliance	`mandatory`		This method must be implemented.
Method	getBusiness
Description	Gets the `Business` associated with this session.
Return	`osid.billing.Business`		the business
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	canRegisterForItemNotifications
Description	Tests if this user can register for `Item` 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	useFederatedBusinessView
Description	Federates the view for methods in this session. A federated view will include items in catalogs which are children of this catalog in the business hierarchy.
Compliance	`mandatory`		This method is must be implemented.
Method	useIsolatedBusinessView
Description	Isolates the view for methods in this session. An isolated view restricts notifications to this business only.
Compliance	`mandatory`		This method is must be implemented.
Method	reliableItemNotifications
Description	Reliable notifications are desired. In reliable mode, notifications are to be acknowledged using `acknowledgeItemNotification()`.
Compliance	`mandatory`		This method is must be implemented.
Method	unreliableItemNotifications
Description	Unreliable notifications are desired. In unreliable mode, notifications do not need to be acknowledged.
Compliance	`mandatory`		This method is must be implemented.
Method	acknowledgeItemNotification
Description	Acknowledge an item 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	registerForNewItems
Description	Register for notifications of new items. `ItemReceiver.newItems()` is invoked when a new `Item` appears in this business.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedItems
Description	Registers for notification of updated items. `ItemReceiver.changedItems()` is invoked when a customer in this business is changed.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForChangedItem
Description	Registers for notification of an updated item. `ItemReceiver.changedItems()` is invoked when the specified item in this business is changed.
Parameters	`osid.id.Id`	`itemId`	the `Id` of the `Item` to monitor
Errors	NULL_ARGUMENT		`itemId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForDeletedItems
Description	Registers for notification of deleted items. `ItemReceiver.deletedItems()` is invoked when an item is deleted or removed from this business.
Errors	OPERATION_FAILED		unable to complete request
Errors	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.
Method	registerForDeletedItem
Description	Registers for notification of a deleted item. `ItemReceiver.deletedItems()` is invoked when the specified item is deleted or removed from this business.
Parameters	`osid.id.Id`	`itemId`	the `Id` of the `Item` to monitor
Errors	NULL_ARGUMENT		`itemId` is `null`
	OPERATION_FAILED		unable to complete request
	PERMISSION_DENIED		authorization failure
Compliance	`mandatory`		This method must be implemented.