internal BiddingNotAllowedNow(
ReverseAuctionAggregate reverseAuction,
IClock clock)
: base(
$"at {clock.Now}, bidding is not allowed on " +
$"ReverseAuction {reverseAuction.Id}")
{
}
private void BiddingMustBeAllowedNow(ReverseAuctionAggregate reverseAuction)
{
Precondition.MustNotBeNull(reverseAuction, nameof(reverseAuction));
if (!reverseAuction.BiddingAllowed.Includes(_clock.Now))
{
throw new BiddingNotAllowedNow(reverseAuction, _clock);
}
}
public void AlterPickup(
ReverseAuctionAggregate aggregate,
string pickupAddress)
{
var pickup = _locationFactory.New(pickupAddress);
aggregate.Root.BuyerTerms.ChangePickup(pickup);
_interAggregateEventBus.Publish(new Event.BuyerTermsChanged(aggregate));
}
public DomainAuction.ReverseAuctionAggregate Update(
DomainAuction.ReverseAuctionAggregate ra)
{
if (ra.Id == Saved.Id)
{
return(ra);
}
throw new ArgumentException($"unknown Id: {ra.Id}");
}
public Bid.BidAggregate PlaceBid(
ReverseAuctionAggregate reverseAuction,
TimeRange pickupTime,
TimeRange dropoffTime,
Money price)
{
Precondition.MustNotBeNull(reverseAuction, nameof(reverseAuction));
// RULE: We'd like to delegate validation and precondition
// checking to Factorys. That keeps the Aggregate code
// clean and simple...
// but we need to enforce a relationship between the Auction
// and the new Bid.
BiddingMustBeAllowedNow(reverseAuction);
BidMustConformToAuctionTime(
reverseAuction.Root.BuyerTerms.Pickup,
nameof(pickupTime),
pickupTime);
BidMustConformToAuctionTime(
reverseAuction.Root.BuyerTerms.Dropoff,
nameof(dropoffTime),
dropoffTime);
PriceMustBeNonNegative(price);
var bid = _bidFactory.New(
reverseAuction.Id,
pickupTime,
dropoffTime,
price);
// TODO: According to IDDD, we'd publish a "created" event
// here. I need to fit this into the context of our work
// to wrap DB transactions around business interactions.
// OTOH, there may be no conflict if the domain event
// publisher is flexible enough that in test the event is
// published immediately but in production the event is
// only published when the transaction is committed.
// However, if the consistency boundary IS the aggregate,
// it may not be reasonable to wait.
var aggregate = new Bid.BidAggregate(bid);
_interAggregateEventBus.Publish(
new Bid.Event.BidCreated(aggregate));
return(aggregate);
}
public ReverseAuctionAggregate New(
string pickupAddress,
TimeRange pickupTime,
string dropoffAddress,
TimeRange dropoffTime,
string otherTerms,
TimeRange biddingAllowed)
{
// RULE: All validation and precondition checking
// is delegated down to the Factorys. That keeps the
// Aggregate code clean and simple.
// TODO: Ideally, exposing this at the aggregate level has the
// potential to allow all the Entity Factorys themselves to be
// hidden within this assembly, and never used outside it
// I haven't figured out how to do that, in practice.
var pickup = new Waypoint(
_locationFactory.New(pickupAddress),
pickupTime);
var dropoff = new Waypoint(
_locationFactory.New(dropoffAddress),
dropoffTime);
var auction = _reverseAuctionFactory.New(
_termsFactory.New(pickup, dropoff, otherTerms),
biddingAllowed);
// TODO: According to IDDD, we'd publish a "created" event
// here. I need to fit this into the context of our work
// to wrap DB transactions around business interactions.
// OTOH, there may be no conflict if the domain event
// publisher is flexible enough that in test the event is
// published immediately but in production the event is
// only published when the transaction is committed.
// However, if the consistency boundary IS the aggregate,
// it may not be reasonable to wait.
var aggregate = new ReverseAuctionAggregate(auction);
_interAggregateEventBus.Publish(
new Event.ReverseAuctionCreated(aggregate));
return(aggregate);
}
public DomainAuction.ReverseAuctionAggregate Save(
DomainAuction.ReverseAuctionAggregate ra)
{
throw new NotImplementedException();
}
