Package org.glassfish.pfl.basic.fsm
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.
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Nested Class Summary
Nested Classes -
Method Summary
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Method Details
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doIt
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.
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