gwt connection between clients

Question

I’m very new to gwt developing and I would like to know, if it is possible to change client information’s from another client. I would like to do following; Person A adds a new car to a list, this modification should also add automatically to another client (website). Is that possible with gwt? Right now, I’m just having the idea to use a solution with a SQL database. Is there a way to connect two websites? Greet

Answer 1

There is no way to do that directly from client to client.
You will have to implement it via a backend (not necessarily a SQL Server).
Client A sends the modifications/data to the backend.

In order for Client B to see the update you can rely on two different techniques:

1. Pull by polling via a Timer (easy to implement)
2. Push either by Websockets or Comet (check out atmosphere project)
3. Push via event based service (check out gwteventservice project)