private void StartProcess <TEvent>(TEvent @event)
where TEvent : IEvent
{
var eventType = typeof(TEvent);
var starter = _definition.GetStarterPredicate <TEvent>()(@event, GetInstanceData());
if (!starter)
{
throw new Exception($"Definition {_definition.GetType()} does not accept eventType {eventType} as a starter event.");
}
var idSelector = _definition.GetCorrelationFilter <TEvent>();
if (idSelector == null)
{
throw new ArgumentNullException($"No correlation defined for eventType {eventType} in definition {_definition.GetType()}");
}
if (State != InstanceStates.NotStarted)
{
throw new Exception($"Cannot start an instance which is in state {State}");
}
var identity = idSelector(@event);
Emit(new ProcessStarted(identity));
}