Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:04: UML Behavior: Activities quick start Tags and keywords Topic level ESSENTIAL UML keywords Activity Activity Diagram ForkNode JoinNode Slide kind UML Activity Diagram Click on the image to view it full size Up next ForkNode and JoinNode with optional ControlFlow guards - LIMITED SUPPORT Notes Snippets (quotes/extracts) [UML-2.5.1] ControlNodes act as “traffic switches” managing the flow of tokens across ActivityEdges. Tokens cannot “rest” at ControlNodes (with exceptions for InitialNodes and ForkNodes ...). [UML-2.5.1] A ForkNode is a ControlNode that splits a flow into multiple concurrent flows. A ForkNode shall have exactly one incoming ActivityEdge, though it may have multiple outgoing ActivityEdges. [UML-2.5.1] If the incoming edge is a ControlFlow, then all outgoing edges shall be ControlFlows and, if the incoming edge is an ObjectFlow, then all outgoing edges shall be ObjectFlows. [UML-2.5.1] Tokens offered to a ForkNode are offered to all outgoing ActivityEdges of the node. If at least one of these offers is accepted, the offered tokens are removed from their original source and the acceptor receives a copy of the tokens. [UML-2.5.1] The ActivityEdges going out of ForkNodes continue to hold the tokens they accept until all pending offers have been accepted by their targets. [UML-2.5.1] A JoinNode is a ControlNode that synchronizes multiple flows. A JoinNode shall have exactly one outgoing ActivityEdge but may have multiple incoming ActivityEdges. [UML-2.5.1] If any of the incoming edges of a JoinNode are ObjectFlows, the outgoing edge shall be an ObjectFlow. Otherwise the outgoing edge shall be a ControlFlow. [UML-2.5.1] If a JoinNode does not have a joinSpec, then this is equivalent to a joinSpec Expression with the Boolean operator “and.” That is, the implicit default joinSpec condition is that there is at least one token offered on each incoming ActivityEdge. [UML-2.5.1] Join nodes may have a joinSpec, which is a ValueSpecification that determines the condition under which the join will emit a token. If a JoinNode has a joinSpec, then this ValueSpecification is evaluated whenever a new token is offered to the JoinNode ... [UML-2.5.1] Alternatively, the joinSpec may consist of an Expression with the name of a single Boolean operator and no operands specified. In this case, the value of the joinSpec shall be given by applying the given operator to Boolean values indicating ... Visit also Visit also (backlinks) Related slides (includes other tutorials) Related slides (backlinks, includes other tutorials) Flags Book traversal links for AND with ForkNode and JoinNode Previous Up Next
