26.5. Number Guess Example: RuleFlow Nodes

In the Number Guess RuleFlow there are several node types:
  • The Start node (white arrow in a green circle) and the End node (red box) mark beginning and end of the rule flow.
  • A Rule Flow Group box (yellow, without an icon) represents a Rule Flow Groups defined in the rules (DRL) file. For example, when the flow reaches the Rule Flow Group "Too High", only those rules marked with an attribute of ruleflow-group "Too High" can potentially fire.
  • Action nodes (yellow cog-shaped icon) perform standard Java method calls. Most action nodes in this example call System.out.println(), indicating the program's progress to the user.
  • Split and Join Nodes (blue ovals, no icon) such as "Guess Correct?" and "More guesses Join" mark places where the flow of control can split and rejoin.
  • Arrows indicate the flow between the various nodes.
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