// this Update method abstracts away the name of the exact aggregate method that we will be using/calling
// this approach allows us to use this single Update method for multiple command messages
// this method is where we implement the lifetime management of an Aggregate in one place
void Update(IFactoryCommand forAggregateIdentifiedBy, Action <FactoryAggregate> executeCommandUsingThis)
{
// Load the event stream from the event store using the FactoryId of the passed in command
var key = forAggregateIdentifiedBy.Id.ToString();
var eventStream = _eventStore.LoadEventStream(key);
// create a new Factory aggregate instance from its history of allEventsRelatedToThisAggregateId
var aggregateState = new FactoryState(eventStream.Events);
var aggregate = new FactoryAggregate(aggregateState);
// execute the delegated Action (lambda that contains a reference to a specific aggregate method call)
// that was passed to this Update method by the "When" methods below
executeCommandUsingThis(aggregate);
// append resulting changes to the aggregate's event stream
_eventStore.AppendEventsToStream(key, eventStream.StreamVersion, aggregate.EventsThatHappened);
}
// this Update method abstracts away the name of the exact aggregate method that we will be using/calling
// this approach allows us to use this single Update method for multiple command messages
// this method is where we implement the lifetime management of an Aggregate in one place
void Update(IFactoryCommand forAggregateIdentifiedBy, Action<FactoryAggregate> executeCommandUsingThis)
{
// Load the event stream from the event store using the FactoryId of the passed in command
var key = forAggregateIdentifiedBy.Id.ToString();
var eventStream = _eventStore.LoadEventStream(key);
// create a new Factory aggregate instance from its history of allEventsRelatedToThisAggregateId
var aggregateState = new FactoryState(eventStream.Events);
var aggregate = new FactoryAggregate(aggregateState);
// execute the delegated Action (lambda that contains a reference to a specific aggregate method call)
// that was passed to this Update method by the "When" methods below
executeCommandUsingThis(aggregate);
// append resulting changes to the aggregate's event stream
_eventStore.AppendEventsToStream(key, eventStream.StreamVersion, aggregate.EventsThatHappened);
}