/**
* Derive the host and port from virtual address if virtual address is indeed contains the actual
* host and port of the server. This is the final resort to compute the final URI in {@link
* #computeFinalUriWithLoadBalancer(ClientRequest)} if there is no load balancer available and the
* request URI is incomplete. Sub classes can override this method to be more accurate or throws
* ClientException if it does not want to support virtual address to be the same as physical
* server address.
*
* <p>The virtual address is used by certain load balancers to filter the servers of the same
* function to form the server pool.
*/
protected Pair<String, Integer> deriveHostAndPortFromVipAddress(String vipAddress)
throws URISyntaxException, ClientException {
Pair<String, Integer> hostAndPort = new Pair<String, Integer>(null, -1);
URI uri = new URI(vipAddress);
String scheme = uri.getScheme();
if (scheme == null) {
uri = new URI("http://" + vipAddress);
}
String host = uri.getHost();
if (host == null) {
throw new ClientException("Unable to derive host/port from vip address " + vipAddress);
}
int port = uri.getPort();
if (port < 0) {
port = getDefaultPort();
}
if (port < 0) {
throw new ClientException("Unable to derive host/port from vip address " + vipAddress);
}
hostAndPort.setFirst(host);
hostAndPort.setSecond(port);
return hostAndPort;
}
