| 摘要 |
A method includes receiving input indicating a listener object and an interface for an object class corresponding to a persisted object of an object model retained by a database, where the interface has multiple different implementations within the object model; recording information indicating that the listener object has an interest in persistent data associated with the interface for the object class corresponding to the persisted object; in connection with a transaction with the database and when each of multiple calls is received for the database, checking whether the interface for the object class corresponding to the persisted object is associated with the call, wherein each of the calls alerts the database to changes for data managed by the database; and communicating with the listener object when the interface for the object class corresponding to the persisted object was associated with at least one of the calls during the transaction.
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