public async Task When_using_Update_then_failed_writes_are_logged_to_EventHandlingErrors()
{
// preload some events for the catchup. replay will hit the barrier on the last one.
var order = new Order();
var productName = Any.Paragraph(4);
order.Apply(new AddItem
{
Quantity = 1,
ProductName = productName,
Price = .01m
});
var repository = new SqlEventSourcedRepository <Order>(new FakeEventBus());
await repository.Save(order);
Projector1 projector = null;
projector = new Projector1
{
OnUpdate = (_, e) =>
{
using (var work = projector.Update())
{
var db = work.Resource <ReadModelDbContext>();
// do something that will trigger a db exception when the UnitOfWork is committed
var inventory = db.Set <ProductInventory>();
inventory.Add(new ProductInventory
{
ProductName = e.ProductName,
QuantityReserved = e.Quantity
});
inventory.Add(new ProductInventory
{
ProductName = e.ProductName,
QuantityReserved = e.Quantity
});
work.VoteCommit();
}
}
};
// act
using (var catchup = CreateReadModelCatchup(projector))
{
await catchup.Run();
}
// assert
using (var db = new ReadModelDbContext())
{
var error = db.Set <EventHandlingError>().Single(e => e.AggregateId == order.Id);
error.Error.Should()
.Contain(
string.Format(
"Violation of PRIMARY KEY constraint 'PK_dbo.ProductInventories'. Cannot insert duplicate key in object 'dbo.ProductInventories'. The duplicate key value is ({0})",
productName));
}
}
public async Task When_using_Update_then_failed_writes_do_not_interrupt_catchup()
{
// preload some events for the catchup. replay will hit the barrier on the last one.
var order = new Order();
var productName = Any.Paragraph(4);
Action addEvent = () => order.Apply(new AddItem
{
Quantity = 1,
ProductName = productName,
Price = .01m
});
Enumerable.Range(1, 30).ForEach(_ => addEvent());
var repository = new SqlEventSourcedRepository <Order>(new FakeEventBus());
await repository.Save(order);
var count = 0;
Projector1 projector = null;
projector = new Projector1
{
OnUpdate = (_, e) =>
{
using (var work = projector.Update())
{
var db = work.Resource <ReadModelDbContext>();
if (count++ == 15)
{
// do something that will trigger a db exception when the UnitOfWork is committed
var inventory = db.Set <ProductInventory>();
inventory.Add(new ProductInventory
{
ProductName = e.ProductName,
QuantityReserved = e.Quantity
});
inventory.Add(new ProductInventory
{
ProductName = e.ProductName,
QuantityReserved = e.Quantity
});
}
work.VoteCommit();
}
}
};
// act
using (var catchup = CreateReadModelCatchup(projector))
{
await catchup.Run();
}
// assert
count.Should().Be(30);
}