code: public static void addTags(Span span, RequestLog log) {
          final String host = log.requestHeaders().authority();
          assert host != null;
          span.tag("http.host", host);
          final StringBuilder uriBuilder = new StringBuilder()
                  .append(log.scheme().uriText())
                  .append("://")
                  .append(host)
                  .append(log.path());
          if (log.query() != null) {
              uriBuilder.append('?').append(log.query());
          }
          span.tag("http.method", log.method().name())
              .tag("http.path", log.path())
              .tag("http.url", uriBuilder.toString())
              .tag("http.status_code", log.status().codeAsText());
          final Throwable responseCause = log.responseCause();
          if (responseCause != null) {
              span.tag("error", responseCause.toString());
          }
  
          final SocketAddress raddr = log.context().remoteAddress();
          if (raddr != null) {
              span.tag("address.remote", raddr.toString());
          }
          final SocketAddress laddr = log.context().localAddress();
          if (laddr != null) {
              span.tag("address.local", laddr.toString());
          }
  
          final Object requestContent = log.requestContent();
          if (requestContent instanceof RpcRequest) {
              span.name(((RpcRequest) requestContent).method());
          }
      }
docs: Adds information about the raw HTTP request, RPC request, and endpoint to the span.