Package io.hektor.fsm

Interface FSM<S extends Enum<S>,C extends Context,D extends Data>

All Known Implementing Classes:

FsmImpl

public interface FSM<S extends Enum<S>,C extends Context,D extends Data>

Author:

jonas@jonasborjesson.com

Method Summary

Modifier and Type	Method	Description
S	getState()	The state in which this FSM currently is.
boolean	isStarted()
boolean	isTerminated()	The FSM is in its terminated state if it has reached the final state.
static <S extends Enum<S>> ContextTypeBuildStep<S>	of(Class<S> type)
void	onEvent(Object event)	Deliver an event to this FSM.
void	reStartAndEnter(S state)	Re-start the FSM and enter the specified state.
void	start()	You must call start() on the FSM before it can be used.

Method Details

start

void start()

You must call start() on the FSM before it can be used. This will cause the FSM to "transition" from a null state to its initial state. Any enter actions associated with the initial state will naturally now be called. Note: calling this method when the FSM is already started will silently be ignored.

isStarted

boolean isStarted()

isTerminated

boolean isTerminated()

The FSM is in its terminated state if it has reached the final state.

Returns:

reStartAndEnter

void reStartAndEnter(S state)
              throws IllegalArgumentException

Re-start the FSM and enter the specified state. The entry actions associated with this state will be executed. This is useful if your FSM throw an exception and you want to control how to deal with that (and potentially let the FSM start over) or if you have suspended/resumed the FSM (e.g. my serializing it to another JVM) and you want to continue were you left off.

Parameters:

state -

Throws:

IllegalArgumentException - in case the state is null

onEvent

void onEvent(Object event)

Deliver an event to this FSM.

Parameters:

event -

getState

S getState()

The state in which this FSM currently is.

of

static <S extends Enum<S>> ContextTypeBuildStep<S> of(Class<S> type)