GenericReceiverModel.hpp

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#ifndef ASIOLIBS_SRC_GENERICRECEIVERMODEL_HPP_
#define ASIOLIBS_SRC_GENERICRECEIVERMODEL_HPP_
 
#include "GenericReceiverConcept.hpp"
 
#include <memory>
#include <string>
#include <utility>
 
namespace dunedaq::asiolibs {
 
template<class TargetPayloadType>
class GenericReceiverModel : public GenericReceiverConcept
{
public:
  explicit GenericReceiverModel(const std::string& receiver_connection_name)
    : m_receiver(get_iom_receiver<TargetPayloadType>(receiver_connection_name))
  {
  }
 
  std::optional<TypeErasedPayload> try_receive(dunedaq::iomanager::Receiver::timeout_t timeout) override
  {
    auto opt_payload = m_receiver->try_receive(timeout);
    if (opt_payload) {
      // Allocate the received payload on the heap with shared ownership,
      // so its lifetime can outlive this function and be tied to async sends.
      auto payload = std::make_shared<TargetPayloadType>(std::move(*opt_payload));
      return TypeErasedPayload{ std::reinterpret_pointer_cast<const void>(payload), payload.get(), sizeof(*payload) };
    }
    return std::nullopt;
  }
 
private:
  std::shared_ptr<iomanager::ReceiverConcept<TargetPayloadType>> m_receiver;
};
 
} // namespace dunedaq::asiolibs
 
#endif // ASIOLIBS_SRC_GENERICRECEIVERMODEL_HPP_