io.engineblock.activityimpl

Class SlotStateTracker

java.lang.Object

io.engineblock.activityimpl.SlotStateTracker

public class SlotStateTracker
extends Object

Holds the state of a slot, allows only valid transitions, and shares the slot state as

Constructor Summary

Constructors

Constructor and Description
SlotStateTracker(long slotId)

Method Summary

Modifier and Type	Method and Description
void	enterState(RunState to) Transition the thread slot to a new state.
AtomicReference<RunState>	getAtomicSlotState() This is how you share the current slot state most directly, but it has a caveat.
RunState	getSlotState()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SlotStateTracker

public SlotStateTracker(long slotId)

Method Detail

getSlotState

public RunState getSlotState()

getAtomicSlotState

public AtomicReference<RunState> getAtomicSlotState()

This is how you share the current slot state most directly, but it has a caveat. By sharing the slot state in this way, you allow external changes. You should only use this method to share slot state for observers.

Returns:

an atomic reference for SlotState

enterState

public void enterState(RunState to)

Transition the thread slot to a new state. only accepting valid transitions.

The valid slot states will be moved to a data type eventually, simplifying this method.

Parameters:

to - The next SlotState for this thread/slot/motor