Using Caché Objects - InterSystems Documentation

20
Using Callback Methods
Callback methods are called by system methods to allow additional user written processing
during specific events. To distinguish these types of methods, they are given names of the
form %OnEvent or OnEvent, where Event describes the event that triggers the callback.
If an event supports a callback method, the method controlling the event automatically executes
the callback method it if it exists. You should never explicitly execute callback methods.
Caché supports the following callback methods:
• %OnAddToSaveSet
• %OnAfterSave
• %OnBeforeSave
• %OnClose
• %OnConstructClone
• %OnDelete
• %OnDetermineClass
• %OnNew
• %OnOpen
• %OnRollBack
• %OnValidateObject
• OnPopulate
Using Caché Objects 169