Event Handler

Event handlers execute whenever a user or server generates an event that is caught by the application. These are also called event “listeners”. User generated events could be anything from a mouse movement or a click to a spoken word. Server generated events would be events like a log service failing or the completion of a database update.

Events are first processed by an event dispatcher. This may call the event handler immediately or wait for more information. Events themselves are a lower-level input. The dispatcher will send these events to the correct handler.

It is possible to create both global level handlers as well as local-scoped handlers in VoiceXML. Within the Plum IVR platform developers are able to create global- and local-scoped handlers for any event that can occur during a call, including fatal errors. Local handlers selectively override global handlers, which allows a generic handler to run when an explicit handler is not needed.

Related links

• Events and Errors in VoiceXML - Cisco VoiceXML Guide (note: not all of these events are supported by the Plum IVR platform)