Evento DevMarche su Eventsourcing (DDD + Stream Processing). Presentazione del nuovo engine NStore per l'implementazione di un sistema in Eventsourcing multipiattaforma e multidatabase.

1. Event Sourcing senza confini: dal cloud allo smartphone.
Facile, veloce, estendibile, open source.
Un evento dedicato a te che sogni ancora “Write Once, Run Everywhere”

3. KNOWLEDGE
4.0
CRM
PLM
DOCSPDM
AR
PROJECTS
SUPPORT
ENTERPRISE
SEARCH
KNOWLEDGE
TREES
AI
TASKSCOLLABORATION
JARVISKNOWLEDGE 4.0

4. NSTORE
.NET DATA STREAMING LIBRARY

5. PERSISTENCE
STREAMS SNAPSHOTS
DOMAIN PROCESSING
NSTORE - ARCHITECTURE LAYOUT

6. DATA STREAMING

7. await stream.AppendAsync
(
new ItemPurchased()
{
ItemId = “ABCC”,
Quantity = 43,
TotalPrice = 1203.74
}
);

8. DATA PROCESSING

9. public class Sum
{
public decimal Total { get; private set; }
private void On(ItemPurchased i)
{
this.Total += i.TotalPrice;
}
}
var result = await stream.Fold().RunAsync<Sum>();

10. OPINIONATED
EVENT SOURCING
LIBRARY

11. public class Room : Aggregate<RoomState>
{
public void EnableBookings()
{
if(!this.State.BookingsEnabled)
Emit(new BookingsEnabled(this.Id));
}
public void AddBooking(DateRange dates)
{
if (State.IsAvailableOn(dates)){
Emit(new RoomBooked(this.Id, dates));
} else {
Emit(new BookingFailed(this.Id, dates));
}
}
}

12. public class RoomState
{
private IList<DateRange> _reservations = new List<DateRange>();
public bool BookingsEnabled { get; private set; }
private void On(BookingsEnabled e)
{
this.BookingsEnabled = true;
}
private void On(RoomBooked e)
{
_reservations.Add(e.Dates);
}
public bool IsAvailableOn(DateRange range)
{
return !_reservations.Any(range.Overlaps);
}
}

13. SCALABLE

14. MULTIPLATFORM

15. https://github.com/ProximoSrl/NStore