code: @Override
      protected void startUp() throws Exception {
          long traceId = LoggerHelpers.traceEnterWithContext(log, this.objectId, "startUp");
          try {
              log.info("Starting gRPC server listening on port: {}", this.config.getPort());
              this.server.start();
          } finally {
              LoggerHelpers.traceLeave(log, this.objectId, "startUp", traceId);
          }
      }
docs: Start gRPC server.