code: public static boolean isKeepAlive(KeepAliveConfig keepAliveConfig, HttpCarbonMessage outboundRequestMsg)
              throws ConfigurationException {
          switch (keepAliveConfig) {
          case AUTO:
              return Float.valueOf((String) outboundRequestMsg.getProperty(Constants.HTTP_VERSION)) > Constants.HTTP_1_0;
          case ALWAYS:
              return true;
          case NEVER:
              return false;
          default:
              // The execution will never reach here. In case execution reach here means it should be an invalid value
              // for keep-alive configurations.
              throw new ConfigurationException("Invalid keep-alive configuration value : "
                      + keepAliveConfig.toString());
          }
      }
docs: Check whether a connection should alive or not.
  @param keepAliveConfig of the connection
  @param outboundRequestMsg of this particular transaction
  @return true if the connection should be kept alive
  @throws ConfigurationException for invalid configurations