private async Task <ProductChangedEvent> PrepareProductChangedEvent(ProductUpsert productUpsert,
string correlationToken)
{
// Perform Lookup to get Genre and Artist Names
var artistName = (await _artistRepository.GetById(productUpsert.ArtistId, correlationToken)).Name;
var genreName = (await _genreRepository.GetById(productUpsert.GenreId, correlationToken)).Name;
//// Provide fallback logic in the event we cannot fetch Artist or Genre name
genreName ??= "Unknown Genre";
artistName ??= "Unknown Artist";
// Populate data in the event object
var productChangedEvent = new ProductChangedEvent
{
Id = productUpsert.Id,
Title = productUpsert.Title,
ArtistName = artistName,
GenreName = genreName,
Price = productUpsert.Price,
ReleaseDate = productUpsert.ReleaseDate ?? DateTime.UtcNow.Date,
ParentalCaution = productUpsert.ParentalCaution,
Upc = productUpsert.Upc,
Cutout = productUpsert.Cutout
};
productChangedEvent.CorrelationToken = correlationToken;
return(productChangedEvent);
}
public async Task Add(string correlationToken, Product product)
{
// Idempotent write check. Ensure insert with same correlation token has
// not already happened. This would most likely do to a retry after the
// product has been added.
var targetAlbum = await _musicRepository.GetByIdWithIdempotencyCheck(product.Id, correlationToken);
if (targetAlbum == null)
{
// Product has not been added yet
await _musicRepository.Add(product);
// Hack: Yet another transformation of same data.
// Added to remove issue in new Core Serializer which doesn't allow circular references.
var productUpsert = new ProductUpsert
{
Id = product.Id,
ArtistId = product.ArtistId,
GenreId = product.GenreId,
Title = product.Title,
ParentalCaution = product.ParentalCaution,
Cutout = product.Cutout,
Price = product.Price,
ReleaseDate = product.ReleaseDate,
Upc = product.Upc
};
await _eventBusPublisher.Publish <ProductChangedEvent>(
await PrepareProductChangedEvent(productUpsert, correlationToken));
}
}
public async Task Update(string correlationToken, Product product)
{
await _musicRepository.Update(product);
// Hack: Yet another transformation of same data.
// Added to remove issue in new Core Serializer which doesn't allow circular references.
var productUpsert = new ProductUpsert
{
Id = product.Id,
ArtistId = product.ArtistId,
GenreId = product.GenreId,
Title = product.Title,
ParentalCaution = product.ParentalCaution,
Cutout = product.Cutout,
Price = product.Price,
ReleaseDate = product.ReleaseDate,
Upc = product.Upc
};
//************** Publish Event *************************
await _eventBusPublisher.Publish <ProductChangedEvent>(
await PrepareProductChangedEvent(productUpsert, correlationToken));
}
