ServiceToken.h

Go to the documentation of this file.

#ifndef art_Framework_Services_Registry_ServiceToken_h
#define art_Framework_Services_Registry_ServiceToken_h

// ======================================================================
//
// ServiceToken - Token used to denote a 'service set'
//
// When you request a new 'service set' to be created from the
// ServiceRegistry, the ServiceRegistry will return a ServiceToken.  When
// you want this 'service set' to be used, create a
// ServiceRegistry::Operate by passing the ServiceToken via the constructor.
//
// ======================================================================

#include "art/Framework/Services/Registry/ServicesManager.h"
#include "art/Framework/Services/Registry/detail/ServiceHelper.h"

#include <memory>

namespace art {
  class ActivityRegistry;
  struct ProcessConfiguration;
  class ProducingServiceSignals;
  class ServiceRegistry;

  class ServiceToken;
}

// ----------------------------------------------------------------------

class art::ServiceToken {
  friend class ServiceRegistry;
  friend class ServicesManager;

public:
  static auto
  createInvalid()
  {
    return ServiceToken{nullptr};
  }

  template <typename T,
            typename = std::enable_if_t<detail::ServiceHelper<T>::scope_val !=
                                        ServiceScope::PER_SCHEDULE>>
  void
  add(std::unique_ptr<T>&& serv)
  {
    manager_->put(std::move(serv));
  }

  template <typename T,
            typename = std::enable_if_t<detail::ServiceHelper<T>::scope_val ==
                                        ServiceScope::PER_SCHEDULE>>
  void
  add(std::vector<std::unique_ptr<T>>&& services)
  {
    manager_->put(std::move(services));
  }

  void
  forceCreation()
  {
    manager_->forceCreation();
  }

  void
  registerProducts(MasterProductRegistry& mpr,
                   ProductDescriptions& productsToProduce,
                   ProducingServiceSignals& signals,
                   ProcessConfiguration const& pc)
  {
    manager_->registerProducts(mpr, productsToProduce, signals, pc);
  }

  void
  getParameterSets(ServicesManager::ParameterSets& out) const
  {
    manager_->getParameterSets(out);
  }

private:
  explicit ServiceToken(std::shared_ptr<ServicesManager> iManager)
    : manager_{iManager}
  {}

  std::shared_ptr<ServicesManager> manager_;

}; // ServiceToken

// ======================================================================

#endif /* art_Framework_Services_Registry_ServiceToken_h */

// Local Variables:
// mode: c++
// End: