Sincronización en aplicaciones offline

1. #GX3585
Synchronization in Offline Applications
Marcos Crispino
@mcrispino
mcrispino@genexus.com

2. #GX24
Send
Receive
Synchronization

3. Receive

4. #GX24
Receive
Properties

5. #GX24
Receive
•
Device data
•
Calculated device data (as should be after synchronization)
•
Differences
By Row

6. #GX24
Receive
•
More server processing, less network traffic
•
Auxiliary tables
•
Hashes
By Row

7. #GX24
Receive By Row
Device
Server
Client
[]
Client [{id=1,name=A}, {id=2,name=B}]
Hash
209c2629f1e4465fb
Client, 209c2629f1e4465fb
[{id=1,name=A}, {id=2,name=B}]
Client [{id=1,name=D}, {id=2,name=B},{id=3,name=C}]
209c2629f1e4465fb
Hash
ba5ad0ce59af4e1da
Client, ba5ad0ce59af4e1da
[{id=1,name=D}, {id=3,name=C}]
INS: {id=3,name=C}
UPD: {id=1,name=D}
DLT: {id=2}
Client, 209c2629f1e4465fb
[{id=1,name=A}, {id=2,name=B}]

8. #GX24
Receive
•
When
•
How
•
By Row Algorithm
Summary

9. Send

10. #GX24
Send
Propiedades

11. #GX24
Send
•
Auto-generated Primary Keys
•
Used as Foreign Keys
•
Change value on the server
Key Mappings

12. #GX24
Send
Key Mapping
Device
Server
INS: Client {ClientId=1, …}
INS: Invoice {InvoiceId=17,
ClientId=1, …}
INS: Client {ClientId=1, …}
INS: Invoice {InvoiceId=17,
ClientId=1, …}
INS
Client {ClientId=24, …}
Invoice {InvoiceId=17, ClientId=24, …}
INS
Client {where ClientId=1
=> ClientId=24}
Invoice {where InvoiceId=17
=> ClientId=24}

13. #GX24
Send
•
Client side: SynchronizationEventsAPI
•
Server side: procedures GxOnPendingEventFailed & GxAfterEventReplicator
Error handling

14. #GX24
Send
•
Properties
•
Key Mappings
•
Error Handling
Summary

15. Any questions?

16. Marcos Crispino – mcrispino@genexus.com - @mcrispino

17. Works for images & blobs?

18. How to preload the local database?

19. Security?

20. Marcos Crispino – mcrispino@genexus.com - @mcrispino