/**
* Returns an instance of ArtnetController for the given host address and port.
*
* @param host host IP for the ArtnetController
* @param port port for the ArtnetController
* @return an instance of ArtnetController
* @throws IOException when the port cannot be opened
*/
public static ArtnetController getInstance(NetworkAddress host, int port) throws IOException {
if (host == null) {
throw new IllegalArgumentException("cannot getInstance of ArtnetController: host is null");
}
if (port <= 0) {
throw new IllegalArgumentException(
"cannot getInstance of ArtnetController: port has to be greater than 0");
}
String identifier = host.getInterfaceAddress().getAddress() + ":" + port;
if (instances.containsKey(identifier)) {
return instances.get(identifier);
} else {
ArtnetController artnetController = new ArtnetController(host, port);
instances.put(identifier, artnetController);
return artnetController;
}
}
