mirror of https://github.com/dspinellis/UMLGraph
56 lines
1.2 KiB
XML
56 lines
1.2 KiB
XML
<?xml version="1.0" ?>
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<notes>
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The following diagram, based on Figure 18-4 appearing on p. 252 of the
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UML User Guide, illustrates constraints on an object's lifeline,
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used both as genuine constraints, and to place a message label
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on a particular position.
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In addition, this diagram also uses nested activation.
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<h2>Diagram</h2>
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<img src="uml-184.gif" alt="UML User Guide: Figure 18-4, p. 252" />
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<h2>Diagram Source Code</h2>
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<fmtcode ext="pic">
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# UML User Guide: Figure 18-4
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.PS
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copy "sequence.pic";
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movewid = 0.5;
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# Define the objects
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object(S,"s:Caller");
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object(W,":Switch");
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pobject(C);
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object(R,"r:Caller");
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# Message sequences
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step();
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active(W);
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async(); message(S,W,"liftReceiver"); sync();
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active(S);
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message(W,S,"setDialTone()");
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async(); message(S,W,"*dialDigit(d)"); sync();
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lconstraint(W,"{dialing.executionTime < 30s}");
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active(W);
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message(W,W,"routeCalls(s,n)");
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inactive(W);
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cmessage(W,C,"c:Convers");
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active(C);
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message(C,R,"ring()");
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active(R);
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async(); message(R,C,"liftReceiver"); sync();
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message(C,W,"connect(r,s)");
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message(W,S,"connect(r)");
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# Specify label as a "constraint" to allign on W
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message(W,R,""); lconstraint(W,"connect(s)");
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step();
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complete(S);
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complete(W);
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complete(C);
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complete(R);
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.PE
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</fmtcode>
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</notes>
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