Section 7.4. Activation Bars


7.4. Activation Bars

When a message is passed to a participant it triggers, or invokes, the receiving participant into doing something; at this point, the receiving participant is said to be active. To show that a participant is active, i.e., doing something, you can use an activation bar, as shown in Figure 7-6.

Figure 7-6. Activation bars show that a participant is busy doing something for a period of time


An activation bar can be shown on the sending and receiving ends of a message. It indicates that the sending participant is busy while it sends the message and the receiving participant is busy after the message has been received

Activation bars are optionalthey can clutter up a diagram.





Learning UML 2.0
Learning UML 2.0
ISBN: 0596009828
EAN: 2147483647
Year: 2007
Pages: 175

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