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How to show asynchronous operations on UML Activity diagram

Asked 2009-01-06T09:58:20.060
20

I am about to draw/document for some client-server connection establishing code to better understand it. There are several operations that are done asynchronously in separate threads (connecting threads, data receiving threads, etc).

Should I show them on separate diagrams? I would prefer to have it on a single diagram to grasp overall view but don't know how to represent it on Activity diagram.

asynchronous uml diagram
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2 Answers

21

I'm not sure if there's a correct way of doing this, I developed my own method by testing different strategies until I came up with something that worked for my own mindset.

This is how I do it:

  • Threads == Swimlanes
  • Thread Operations == Action/Activity nodes
  • Critical sections == Object nodes
  • Thread creation == Fork nodes
answered 2009-01-25T12:14:19.960
6

Instead of using full arrowheads you can use half arrowheads to show an asynchronous message call. As shown

alt text

answered 2009-01-06T10:17:36.607

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