// TODO: needs to be InetAddress[]
public InetAddress resolvePublishHostAddresses(String publishHosts[]) throws IOException {
if (publishHosts == null) {
if (GLOBAL_NETWORK_PUBLISHHOST_SETTING.exists(settings)
|| GLOBAL_NETWORK_HOST_SETTING.exists(settings)) {
// if we have settings use them (we have a fallback to GLOBAL_NETWORK_HOST_SETTING inline
publishHosts =
GLOBAL_NETWORK_PUBLISHHOST_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
} else {
// next check any registered custom resolvers
for (CustomNameResolver customNameResolver : customNameResolvers) {
InetAddress addresses[] = customNameResolver.resolveDefault();
if (addresses != null) {
return addresses[0];
}
}
// we know it's not here. get the defaults
publishHosts =
GLOBAL_NETWORK_PUBLISHHOST_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
}
}
InetAddress addresses[] = resolveInetAddresses(publishHosts);
// TODO: allow publishing multiple addresses
// for now... the hack begins
// 1. single wildcard address, probably set by network.host: expand to all interface addresses.
if (addresses.length == 1 && addresses[0].isAnyLocalAddress()) {
HashSet<InetAddress> all = new HashSet<>(Arrays.asList(NetworkUtils.getAllAddresses()));
addresses = all.toArray(new InetAddress[all.size()]);
}
// 2. try to deal with some (mis)configuration
for (InetAddress address : addresses) {
// check if its multicast: flat out mistake
if (address.isMulticastAddress()) {
throw new IllegalArgumentException(
"publish address: {"
+ NetworkAddress.format(address)
+ "} is invalid: multicast address");
}
// check if its a wildcard address: this is only ok if its the only address!
// (if it was a single wildcard address, it was replaced by step 1 above)
if (address.isAnyLocalAddress()) {
throw new IllegalArgumentException(
"publish address: {"
+ NetworkAddress.format(address)
+ "} is wildcard, but multiple addresses specified: this makes no sense");
}
}
// 3. if we end out with multiple publish addresses, select by preference.
// don't warn the user, or they will get confused by bind_host vs publish_host etc.
if (addresses.length > 1) {
List<InetAddress> sorted = new ArrayList<>(Arrays.asList(addresses));
NetworkUtils.sortAddresses(sorted);
addresses = new InetAddress[] {sorted.get(0)};
}
return addresses[0];
}
