MachineObserver<S, E> class abstract

Observer interface for monitoring state machine execution.

Implement this class to hook into lifecycle events, transitions, and error handling. Default implementations are empty, so you can override only the methods you need.

Implementers

• PrintObserver

Constructors

MachineObserver()

Creates a new MachineObserver.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onEventDeferred(HsmState<S, E> state, E event, Object? data) → void

Called when an event is deferred by a state.

onEventDropped(HsmState<S, E> state, E event, Object? data) → void

Called when a deferred event is dropped.

onEventError(Machine<S, E> machine, E event, Object? data, Object error, StackTrace stackTrace) → void

Called when an error occurs during event processing.

onEventHandled(HsmState<S, E> state, E event, Object? data) → void

Called when an event has been successfully handled.

onEventHandling(Machine<S, E> machine, E event, Object? data) → void

Called when the machine begins processing an event.

onEventQueued(Machine<S, E> machine, E event, Object? data) → void

Called when an event is added to the machine's event queue.

onEventUnhandled(HsmState<S, E> state, E event, Object? data) → void

Called when an event was not handled by any active state.

onInternalTransition(HsmState<S, E> state, E? event, Object? data) → void

Called when an internal transition (no state change) occurs.

onMachineStarted(Machine<S, E> machine) → void

Called when the machine has successfully started and entered its root state.

onMachineStarting(Machine<S, E> machine) → void

Called when the machine is starting.

onMachineStopped(Machine<S, E> machine) → void

Called when the machine has been stopped and all states have been exited.

onMachineTerminated(Machine<S, E> machine) → void

Called when the machine enters a TerminateState.

onStateEnter(HsmState<S, E> state) → void

Called when a state is entered.

onStateExit(HsmState<S, E> state) → void

Called when a state is exited.

onTransition(HsmState<S, E> source, HsmState<S, E> target, E? event, Object? data, TransitionKind kind) → void

Called when a transition between two states occurs.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited