Assign an unique NodeID automatically

It shouldn't be needed to assign the node-id manually IMO.

You could store the node-id on a file and recover it for subsequent starts.

On hornetQ for instance, we look for the nodeID on a file, if the file doesn't exist we assign a UUID and write to the file.

In our previous experience UUID would be a best fit to assign the nodes since that was the only way we could guarantee unique IDs between the nodes.