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CatalogIntegrationEventService Refactored

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This commit is contained in:
Cesar De la Torre 2017-04-04 17:01:58 -07:00
parent 3c909ff392
commit 393b47fa93
3 changed files with 12 additions and 9 deletions
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13
src/Services/Catalog/Catalog.API/Controllers/CatalogController.cs
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@ -152,13 +152,16 @@ namespace Microsoft.eShopOnContainers.Services.Catalog.API.Controllers
catalogItem = productToUpdate;
_catalogContext.CatalogItems.Update(catalogItem);
if (raiseProductPriceChangedEvent) // Save and publish event if price has changed
{
if (raiseProductPriceChangedEvent) // Save and publish integration event if price has changed
{
//Create Integration Event to be published through the Event Bus
var priceChangedEvent = new ProductPriceChangedIntegrationEvent(catalogItem.Id, productToUpdate.Price, oldPrice);
// Achieving atomicity between original Catalog database operation and the IntegrationEventLog thanks to a local transaction
await _catalogIntegrationEventService.SaveEventAsync(priceChangedEvent);
// Publish to Event Bus only if product price changed
await _catalogIntegrationEventService.PublishAsync(priceChangedEvent);
await _catalogIntegrationEventService.SaveEventAndCatalogContextChangesAsync(priceChangedEvent);
// Publish through the Event Bus and mark the saved event as published
await _catalogIntegrationEventService.PublishThroughEventBusAsync(priceChangedEvent);
}
else // Save updated product
{

4
src/Services/Catalog/Catalog.API/IntegrationEvents/CatalogIntegrationEventService.cs
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@ -27,13 +27,13 @@ namespace Catalog.API.IntegrationEvents
_eventLogService = _integrationEventLogServiceFactory(_catalogContext.Database.GetDbConnection());
}
public async Task PublishAsync(IntegrationEvent evt)
public async Task PublishThroughEventBusAsync(IntegrationEvent evt)
{
_eventBus.Publish(evt);
await _eventLogService.MarkEventAsPublishedAsync(evt);
}
public async Task SaveEventAsync(IntegrationEvent evt)
public async Task SaveEventAndCatalogContextChangesAsync(IntegrationEvent evt)
{
//Use of an EF Core resiliency strategy when using multiple DbContexts within an explicit BeginTransaction():
//See: https://docs.microsoft.com/en-us/ef/core/miscellaneous/connection-resiliency

4
src/Services/Catalog/Catalog.API/IntegrationEvents/ICatalogIntegrationEventService.cs
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@ -8,7 +8,7 @@ namespace Catalog.API.IntegrationEvents
{
public interface ICatalogIntegrationEventService
{
Task SaveEventAsync(IntegrationEvent evt);
Task PublishAsync(IntegrationEvent evt);
Task SaveEventAndCatalogContextChangesAsync(IntegrationEvent evt);
Task PublishThroughEventBusAsync(IntegrationEvent evt);
}
}