Synchronization flow

Synchronization flow from Exchange to vtenext
PHASE 1
Streaming channel always active between vtenext and Exchange.
PHASE 2
Arrival of an item from Exchange.
PHASE 3
Complete data reception and writing or editing of the element on vtenext.
Synchronitazion flow from vtenext to Exchange
PHASE 1
Sending of an item to Exchange in create / edit / delete.
PHASE 2
Receiving Exchange ID and writing in vtenext to have a reference.