In UML modeling, a call trigger is an event that represents
the receipt of a request to invoke an operation. A transition with
a call trigger initiates when the called operation is invoked.
Before you can add a trigger to a transition,
you must have a state machine diagram open in the Modeling perspective.
To add a call trigger to a transition:
- Right-click a transition; then click and
complete one of the following steps.
- To create a new operation, click Create New
Operation, type a name and press Enter.
- To select an existing operation, click Select
Existing Element, in the Select Element window,
in the list, click an operation, and click OK.
Type a name and press Enter.