active class
A class whose instances are active objects.
See active object for details.
Semantics
An active class is a class whose instances are active objects.
Notation
An active class is shown as a rectangle with doubled vertical lines on the left and right sides. The notation has changed in UML2.
Example
Figure 14-8 shows a class diagram with an active class and its passive parts. Figure 14-9 shows a collaboration that contains active objects corresponding to this model.
Figure 14-8. Active class and passive parts
Figure 14-9. Communication diagram with active roles and concurrent control
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