/// <summary>
/// Finds an aggregate, runs the update handler and saves the aggregate
/// </summary>
/// <typeparam name="T">Type of the aggregate</typeparam>
/// <param name="repository">repository instance</param>
/// <param name="id">the aggregate id</param>
/// <param name="handler">the update handler</param>
/// <returns>A Task containing the updated aggregate</returns>
public static async Task <T> Update <T>(this IAggregateRepository <T> repository, string id, Action <T> handler)
where T : IAggregate
{
var aggregate = await repository.Find(id);
handler(aggregate);
await repository.Save(aggregate);
return(aggregate);
}
public async Task Handle(AddBidCommand command)
{
var auction = await _auctionRepository.Find(command.Id);
if (auction is null) // Todo: in case of asynchornous command handling - should this validation be moved to the command initiator (i.e. API)?
{
throw new InvalidOperationException($"auction id: {command.Id} not found");
}
auction.AddBid(command.ItemId, command.Bidder, command.Amount, command.BidTimestamp);
await _auctionRepository.Update(auction);
}
public async Task Handle(AdditemToAuctionCommand message)
{
var auction = await _auctionRepository.Find(message.AuctionId);
auction.AddItem(message.Item.Name, message.Item.Description, message.Item.ReservedPrice);
}