private DomainEvent ToDomainEvent(OutboxEvent outboxEvent)
{
var eventType = Type.GetType(outboxEvent.EventName);
var domainEvent = JsonSerializer.Deserialize(outboxEvent.Payload, eventType);
return((DomainEvent)domainEvent);
}
public IEvent FromOutboxEvent(OutboxEvent @event)
{
var assembly = Assembly.GetAssembly(typeof(IEvent));
var eventType = assembly.GetTypes()
.FirstOrDefault(x => x.Name == @event.EventType)
?? throw new ArgumentNullException(nameof(@event.EventType), $"Cannot find EventType for event with Id: {@event.Id}.");
return((IEvent)eventType.GetMethod("CreateFromMessage")?.Invoke(null, new object [] { @event.Id, @event.CreatedDate, @event.Message }));
}
public async Task <ActionResult> PostProductSagaChoreography(ProductRequestDto productRequestDto)
{
var @event = new ProductCreated {
Guid = Guid.NewGuid(), Id = 5, Name = "Twarożek"
};
var product = _mapper.Map <Product>(productRequestDto);
_context.Products.Add(product);
var data = JsonSerializer.Serialize(product);
var productEvent = new OutboxEvent(data, "ProductCreated");
_context.OutboxEvents.Add(productEvent);
await _context.SaveChangesAsync();
return(Ok());
}
public async Task <Unit> Handle(ProductCreated productCreated, CancellationToken cancellationToken)
{
_logger.LogInformation($"---- Received {nameof(ProductCreated)} message: Product.Guid = [{productCreated.Guid}] ----");
try
{
if (productCreated.Name.EndsWith('1'))
{
_logger.LogError($"---- PRODUCT ENDS WITH '1' !!! THAT IS NOT VALID: Product.Guid = [{productCreated.Guid}] ----");
throw new System.Exception($"PRODUCT ENDS WITH '1' !!! THAT IS NOT VALID: Product.Guid = [{productCreated.Guid}]");
}
using (var scope = _serviceScopeFactory.CreateScope())
{
var context = scope.ServiceProvider.GetRequiredService <ShippingContext>();
var product = _mapper.Map <Product>(productCreated);
context.Products.Add(product);
await context.SaveChangesAsync();
}
_logger.LogInformation($"---- Saved {nameof(ProductCreated)} message: Product.Guid = [{productCreated.Guid}] ----");
}
catch (System.Exception ex)
{
_logger.LogError($"Exception :( Guid = [{productCreated.Guid}]");
using (var scope = _serviceScopeFactory.CreateScope())
{
var context = scope.ServiceProvider.GetRequiredService <ShippingContext>();
var productRejected = new ProductRejected {
Guid = productCreated.Guid
};
var data = JsonSerializer.Serialize(productRejected);
var productEvent = new OutboxEvent(data, "ProductRejected");
context.OutboxEvents.Add(productEvent);
await context.SaveChangesAsync();
}
}
return(await Task.FromResult(Unit.Value));
}
public async Task Add(EventMessage eventMessage) => await _eventDataWriter.Add(OutboxEvent.FromEventMessage(eventMessage));
public void Remove(OutboxEvent outboxEvent)
{
_context.Remove(outboxEvent);
_context.SaveChanges();
}
public async Task Add(OutboxEvent outboxEvent) => await _context.Events.AddAsync(outboxEvent);
public async Task PublishAsync(OutboxEvent @event)
{
await _bus.Publish(@event.GetEvent(), @event.Metadata);
}
