attemptStartUntilPortAvailable
Attempts to start the server on a free port. Only a port reported as occupied before onReady starts makes the scan advance: any other failure propagates to the caller instead of being retried on another port.
Parameters
startingPort
port to start from
onReady
callback called when the server is ready to accept requests, with the application and port as arguments. It is invoked at most once, no matter how many ports the scan goes through
Throws
IOException
if no port in the startingPort..65535 range is available