How to use

doGetIpv4AddressFromNetworkInterface

method

in

org.apache.servicecomb.foundation.common.net.NetUtils

private static void doGetHostNameAndHostAddress() {
 try {
  doGetIpv4AddressFromNetworkInterface();
  // getLocalHost will throw exception in some docker image and sometimes will do a hostname lookup and time consuming
  InetAddress localHost = InetAddress.getLocalHost();
  hostName = localHost.getHostName();
  if ((localHost.isAnyLocalAddress() || localHost.isLoopbackAddress() || localHost.isMulticastAddress())
    && !allInterfaceAddresses.isEmpty()) {
   InetAddress availabelAddress = allInterfaceAddresses.values().iterator().next();
   hostAddress = availabelAddress.getHostAddress();
   LOGGER.warn("cannot find a proper host address, choose {}, may not be correct.", hostAddress);
  } else {
   LOGGER.info("get localhost address: {}", localHost.getHostAddress());
   hostAddress = localHost.getHostAddress();
  }
  LOGGER.info(
    "add host name from localhost:" + hostName + ",host address:" + hostAddress);
 } catch (Exception e) {
  LOGGER.error("got exception when trying to get addresses:", e);
  if (allInterfaceAddresses.size() >= 1) {
   InetAddress entry = allInterfaceAddresses.entrySet().iterator().next().getValue();
   // get host name will do a reverse name lookup and is time consuming
   hostName = entry.getHostName();
   hostAddress = entry.getHostAddress();
   LOGGER.info(
     "add host name from interfaces:" + hostName + ",host address:" + hostAddress);
  }
 }
}

private static void doGetHostNameAndHostAddress() {
 try {
  doGetIpv4AddressFromNetworkInterface();
  // getLocalHost will throw exception in some docker image and sometimes will do a hostname lookup and time consuming
  InetAddress localHost = InetAddress.getLocalHost();
  hostName = localHost.getHostName();
  if ((localHost.isAnyLocalAddress() || localHost.isLoopbackAddress() || localHost.isMulticastAddress())
    && !allInterfaceAddresses.isEmpty()) {
   InetAddress availabelAddress = allInterfaceAddresses.values().iterator().next();
   hostAddress = availabelAddress.getHostAddress();
   LOGGER.warn("cannot find a proper host address, choose {}, may not be correct.", hostAddress);
  } else {
   hostAddress = localHost.getHostAddress();
  }
  LOGGER.info(
    "add host name from localhost:" + hostName + ",host address:" + hostAddress);
 } catch (Exception e) {
  LOGGER.error("got exception when trying to get addresses:", e);
  if (allInterfaceAddresses.size() >= 1) {
   InetAddress entry = allInterfaceAddresses.entrySet().iterator().next().getValue();
   // get host name will do a reverse name lookup and is time consuming
   hostName = entry.getHostName();
   hostAddress = entry.getHostAddress();
   LOGGER.info(
     "add host name from interfaces:" + hostName + ",host address:" + hostAddress);
  }
 }
}