MessageActionBuilder<M, D, C> class

Provides methods for describing actions that can be taken while a state handles a message.

A MessageActionBuilder is accessed from the MessageHandlerBuilder.act property.

void onMessage<M>(MessageHandlerContext<M, void, void>) => print('Handling message');

var state1 = StateKey('s1');
var state2 = StateKey('s2');
var builder = StateTreeBuilder(initialState: state1);

builder.state(state1, (b) {
  // Calls the onMessage function as a side effect before the transition occurs
  b.onMessage<MyMessage>((b) => b.goTo(state2, action: b.act.run(onMessage)));
});

Constructors

MessageActionBuilder(StateKey _forState, Logger _log)

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
post<M2>({FutureOr<M2> getMessage(MessageHandlerContext<M, D, C> ctx)?, M2? message, String? label}) → MessageActionDescriptor<M, D, C>
Posts a new message to be processed by the state machine while a message is being handled.
run(FutureOr<void> action(MessageHandlerContext<M, D, C>), {String? label}) → MessageActionDescriptor<M, D, C>
Runs the action while a message is being handled.
schedule<M2>({FutureOr<M2> getMessage(MessageHandlerContext<M, D, C> ctx)?, M2? message, Duration duration = Duration.zero, bool periodic = false, String? label}) → MessageActionDescriptor<M, D, C>
Schedules a message to be processed by the state machine while a message is being handled.
toString() → String
A string representation of this object.
inherited
updateData<D2>(D2 update(MessageHandlerContext<M, D, C> ctx, D2 data), {StateKey? forState, String? label}) → MessageActionDescriptor<M, D, C>
Updates state data of type D while a message is being handled.
updateOwnData(D update(MessageHandlerContext<M, D, C> ctx), {StateKey? forState, String? label}) → MessageActionDescriptor<M, D, C>

Operators

operator ==(Object other) → bool
The equality operator.
inherited