29  * Description goes here
  30  *
  31  * @author Ken Cavanaugh
  32  */
  33 public interface Action
  34 {
  35         /** Called by the state engine to perform an action
  36         * before a state transition takes place.  The FSM is
  37         * passed so that the Action may set the next state in
  38         * cases when that is required.  FSM and Input together
  39         * allow actions to be written that depend on the state and
  40         * input, but this should generally be avoided, as the
  41         * reason for a state machine in the first place is to cleanly
  42         * separate the actions and control flow.   Note that an
  43         * action should complete in a timely manner.  If the state machine
  44         * is used for concurrency control with multiple threads, the
  45         * action must not allow multiple threads to run simultaneously
  46         * in the state machine, as the state could be corrupted.
  47         * Any exception thrown by the Action for the transition
  48         * will be propagated to doIt.
  49         * @param FSM fsm is the state machine causing this action.
  50         * @param Input in is the input that caused the transition.
  51         */
  52         public void doIt( FSM fsm, Input in ) ;
  53 }
  54 
  55 // end of Action.java

  29  * Description goes here
  30  *
  31  * @author Ken Cavanaugh
  32  */
  33 public interface Action
  34 {
  35         /** Called by the state engine to perform an action
  36         * before a state transition takes place.  The FSM is
  37         * passed so that the Action may set the next state in
  38         * cases when that is required.  FSM and Input together
  39         * allow actions to be written that depend on the state and
  40         * input, but this should generally be avoided, as the
  41         * reason for a state machine in the first place is to cleanly
  42         * separate the actions and control flow.   Note that an
  43         * action should complete in a timely manner.  If the state machine
  44         * is used for concurrency control with multiple threads, the
  45         * action must not allow multiple threads to run simultaneously
  46         * in the state machine, as the state could be corrupted.
  47         * Any exception thrown by the Action for the transition
  48         * will be propagated to doIt.
  49         * @param fsm  the state machine causing this action.
  50         * @param in   the input that caused the transition.
  51         */
  52         public void doIt( FSM fsm, Input in ) ;
  53 }
  54 
  55 // end of Action.java