public async Task Become(string behavior)
{
if (IsNull())
{
throw new InvalidOperationException("Initial behavior should be set before calling Become");
}
if (next != null)
{
throw new InvalidOperationException($"Become cannot be called again while behavior configuration is in progress.\n" +
$"Current: {Current}, In-progress: {next.Name}, Offending: {behavior}");
}
if (Current == behavior)
{
throw new InvalidOperationException($"Actor is already behaving as '{behavior}'");
}
var action = RegisteredAction(behavior);
next = new CustomBehavior(behavior);
action(actor);
var transition = new Transition(current, next);
try
{
await actor.OnTransitioning(transition);
await current.HandleDeactivate(transition);
await current.HandleUnbecome(transition);
current = next;
await current.HandleBecome(transition);
next = null; // now become could be re-entered ...
await current.HandleActivate(transition);
// ... and we can signal about successful transition
await actor.OnTransitioned(transition);
}
catch (Exception exception)
{
await actor.OnTransitionFailure(transition, exception);
actor.Activation.DeactivateOnIdle();
ExceptionDispatchInfo.Capture(exception).Throw();
}
}
public async Task HandleBecome(Transition transition)
{
if (IncludedIn(transition.from))
{
return;
}
if (super != null)
{
await super.HandleBecome(transition);
}
if (onBecome != null)
{
await onBecome();
}
}