Lifeline Activation Levels

[Elham]

Hi
What is Lifeline Activation Levels?
seems,it's only in EA.

Thanks

[Oliver F.]

Hi
What is Lifeline Activation Levels?
seems,it's only in EA.

The activation level is a standard sequence feature (even in UML 2.x) which groups messages depending on the flow of operation.

Eg. take that famous ATM example- assume that the flow of messages is logon->enter PIN code->enter amount of withdawal->withdraw.
Then there is a case in which the customer enters the wrong identification code.
The reaction on this exceptional path is a direct response to "enter PIN code" so it is on the same activiation level and initiates a sequence of actions on the same level.
If you do not raise that level it would be hard to distinguish the flow in that scenario whether eg. "show error message" belongs to the wrongly entered PIN code or is always executed before "enter amount of withdrawal". So the activation level separates the message flow in the exceptional case from the rest of the activities.

It helps a lot keeping the overview in complex scenarios by grouping related messages together.

HTH

Oliver