Get hostname

  private static final Log LOG = Logging.getLog(NodeHelper.class);

  /**
   * @return a node Id for this instance
   */
  public static final String getNodeId () {
    final String nodeId = String.format("hostname=%s", getHostname());
    return nodeId;
  }

  /**
   * @return a hostname for this instance
   */
  public static final String getHostname () {
    String hostname = "error-unknown";
    try {
      hostname = InetAddress.getLocalHost().getHostName();
    } catch (final UnknownHostException e) {
      LOG.error(String.format("Error acquiring hostname"), e);
    } catch (final RuntimeException e) {
      LOG.error(String.format("Error acquiring hostname"), e);
    }
    return hostname;
  }