Interface Action

All Known Implementing Classes:
Action.Base

public interface Action
An Action may be associated with a transition between to states. The transition action doIt method is called before the transition takes place.
  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static class 
     
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    doIt(FSM fsm, Input in)
    Called by the state engine to perform an action before a state transition takes place.
  • Method Details

    • doIt

      void doIt(FSM fsm, Input in)
      Called by the state engine to perform an action before a state transition takes place. The FSM is passed so that the Action may examine the state of the FSM. Note that an action should complete in a timely manner. If the state machine is used for concurrency control with multiple threads, the action must not allow multiple threads to run simultaneously in the state machine, as the state could be corrupted. Any exception thrown by the Action for the transition will be propagated to doIt.
      Parameters:
      fsm - is the state machine causing this action.
      in - is the input that caused the transition.