Nothing really specific ; it could even be a part of the UI that
just
polls some generic API every second and then informs other parts in the UI.
This is how I implemented that fast prototype I did with the UI messages coming from the
agent. Used polling.
Perhaps GWT or SmartGWT also offers something similar out of the box
There is the concept of a GWT timer. Just something that gets triggered after N
milliseconds. You can implement a simple polling mechanism using that and have it
continually poll the server. This is what Errai helps with - IIUC, Errai avoids the need
to continually poll, since it involves pushing from server to gwt client. But we don't
currently integrate with Errai as we all know.