public void Report_projections_can_be_created_using_anonymous_projectors_over_multiple_event_types()
{
var projector = Projector.Combine(
Projector.CreateFor <Placed>(e =>
{
using (var db1 = new ReadModelDbContext())
{
db1.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count++;
db1.SaveChanges();
}
}),
Projector.CreateFor <Cancelled>(e =>
{
using (var db2 = new ReadModelDbContext())
{
db2.OrderTallyByStatus(OrderTally.OrderStatus.Canceled).Count++;
db2.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count--;
db2.SaveChanges();
}
}),
Projector.CreateFor <Delivered>(e =>
{
using (var db3 = new ReadModelDbContext())
{
db3.OrderTallyByStatus(OrderTally.OrderStatus.Delivered).Count++;
db3.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count--;
db3.SaveChanges();
}
})).Named("Order status report");
Events.Write(20, _ => new Order.Cancelled());
Events.Write(20, _ => new Order.Delivered());
Events.Write(50, _ => new Order.Placed());
using (var catchup = CreateReadModelCatchup(projector))
{
catchup.Run();
}
using (var db = new ReadModelDbContext())
{
db.Set <OrderTally>()
.Single(t => t.Status == "Canceled")
.Count
.Should()
.Be(20);
db.Set <OrderTally>()
.Single(t => t.Status == "Delivered")
.Count
.Should()
.Be(20);
db.Set <OrderTally>()
.Single(t => t.Status == "Pending")
.Count
.Should()
.Be(10);
}
}
public OrderTallyProjector()
{
On <Placed>(e =>
{
using (var db = new ReadModelDbContext())
{
db.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count++;
db.SaveChanges();
}
});
On <Cancelled>(e =>
{
using (var db = new ReadModelDbContext())
{
db.OrderTallyByStatus(OrderTally.OrderStatus.Canceled).Count++;
db.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count--;
db.SaveChanges();
}
});
On <Delivered>(e =>
{
using (var db = new ReadModelDbContext())
{
db.OrderTallyByStatus(OrderTally.OrderStatus.Delivered).Count++;
db.OrderTallyByStatus(OrderTally.OrderStatus.Pending).Count--;
db.SaveChanges();
}
});
On("Order.Fulfilled", e =>
{
using (var db = new ReadModelDbContext())
{
db.OrderTallyByStatus(OrderTally.OrderStatus.Fulfilled).Count++;
db.SaveChanges();
}
});
On("Order.Misdelivered", e =>
{
using (var db = new ReadModelDbContext())
{
db.OrderTallyByStatus(OrderTally.OrderStatus.Misdelivered).Count++;
db.SaveChanges();
}
});
}