code: public static String createHostName(String prefix) {
          String usePrefix = prefix;
          if ((usePrefix == null) || usePrefix.isEmpty()) {
              usePrefix = "javahost";
          }
          return usePrefix + "-" + safeCreateUUID();
      }
docs: Convenience method for generating unique host names, safe to pass to the EventProcessorHost constructors
  that take a hostName argument.
  <p>
  If a prefix is supplied, the constructed name begins with that string. If the prefix argument is null or
  an empty string, the constructed name begins with "javahost". Then a dash '-' and a UUID are appended to
  create a unique name.
  
  @param prefix String to use as the beginning of the name. If null or empty, a default is used.
  @return A unique host name to pass to EventProcessorHost constructors.