Method CreateModule

core/module_graph.cc:246–286

Creates a module to the graph.

// Creates a module to the graph.
Module *ModuleGraph::CreateModule(const ModuleBuilder &builder,
                                  const std::string &module_name,
                                  const google::protobuf::Any &arg,
                                  pb_error_t *perr) {
  Module *m =
      builder.CreateModule(module_name, &bess::metadata::default_pipeline);

  CommandResponse ret = m->InitWithGenericArg(arg);
  {
    google::protobuf::Any empty;

    if (ret.data().SerializeAsString() != empty.SerializeAsString()) {
      LOG(WARNING) << module_name << "::" << builder.class_name()
                   << " Init() returned non-empty response: "
                   << ret.data().DebugString();
    }
  }

  if (ret.error().code() != 0) {
    *perr = ret.error();
    delete m;
    return nullptr;
  }

  if (m->is_task()) {
    if (!tasks_.insert(m->name()).second) {
      *perr = pb_errno(ENOMEM);
      delete m;
      return nullptr;
    }
  }

  bool module_added = all_modules_.insert({m->name(), m}).second;
  if (!module_added) {
    *perr = pb_errno(ENOMEM);
    delete m;
    return nullptr;
  }

  return m;
}

void ModuleGraph::DestroyModule(Module *m, bool erase) {
  changes_made_ = true;