Generally, when I set a value to the Firebase-realtime-database, the SDK first writes the data into a local cache, and then it forwards the data to server. When I'm listening to the same node, listeners will be triggered even before data reaches the server.
But what if I made a write like this:
databaseReference.setValue(ServerValue.TIMESTAMP)
and then listen there like this:
databaseReference.addListenerForSingleValueEvent(object : ValueEventListener {
override fun onDataChange(snapshot: DataSnapshot) {
snapshot.getValue<Long>()!!
}
override fun onCancelled(error: DatabaseError) {}
}
I have confusion in this because timestamps are written by server. So how can it return correct data in local cache?
