SourceModel.hpp

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#ifndef DPDKLIBS_SRC_SOURCEMODEL_HPP_
#define DPDKLIBS_SRC_SOURCEMODEL_HPP_
 
#include "SourceConcept.hpp"
 
#include "dpdklibs/Issues.hpp"
 
#include "iomanager/IOManager.hpp"
#include "iomanager/Sender.hpp"
#include "logging/Logging.hpp"
 
#include "dpdklibs/opmon/SourceModel.pb.h"
 
#include "datahandlinglibs/DataMoveCallbackRegistry.hpp"
 
// #include <folly/ProducerConsumerQueue.h>
// #include <nlohmann/json.hpp>
 
#include <atomic>
#include <memory>
#include <mutex>
#include <string>
 
 
namespace dunedaq::dpdklibs {
 
template<class TargetPayloadType>
class SourceModel : public SourceConcept
{
public:
  using sink_t = iomanager::SenderConcept<TargetPayloadType>;
  using inherited = SourceConcept;
  using data_t = nlohmann::json;
 
  SourceModel()
    : SourceConcept()
  {}
  ~SourceModel() {}
 
  void set_sink(const std::string& sink_name, bool callback_mode) override
  {
    m_callback_mode = callback_mode;
    if (callback_mode) {
      TLOG_DEBUG(5) << "Callback mode requested. Won't acquire iom sender!";
    } else {
      if (m_sink_is_set) {
        TLOG_DEBUG(5) << "SourceModel sink is already set in initialized!";
      } else {
        m_sink_queue = get_iom_sender<TargetPayloadType>(sink_name);
        m_sink_is_set = true;
      }
    }
  }
 
  void acquire_callback() override
  {
    if (m_callback_mode) {
      if (m_callback_is_acquired) {
        TLOG_DEBUG(5) << "SourceModel callback is already acquired!";
      } else {
        // Getting DataMoveCBRegistry
        auto dmcbr = datahandlinglibs::DataMoveCallbackRegistry::get();
        m_sink_callback = dmcbr->get_callback<TargetPayloadType>(inherited::m_sink_name);
        m_callback_is_acquired = true;
      }
    } else {
      TLOG_DEBUG(5) << "Won't acquire callback, as IOM sink is set!";
    }
  }
 
  std::shared_ptr<sink_t>& get_sink() { return m_sink_queue; }
 
  bool handle_payload(char* message, std::size_t size) // NOLINT(build/unsigned)
  {
    bool push_out = true;
    if (push_out) {
 
      TargetPayloadType& target_payload = *reinterpret_cast<TargetPayloadType*>(message);
  
      if (m_callback_mode) {
        (*m_sink_callback)(std::move(target_payload));
      } else {
        if (!m_sink_queue->try_send(std::move(target_payload), iomanager::Sender::s_no_block)) {
          ++m_dropped_packets;
        }
      }
 
    } else {
      TargetPayloadType target_payload;
      uint32_t bytes_copied = 0;
      datahandlinglibs::buffer_copy(message, size, static_cast<void*>(&target_payload), bytes_copied, sizeof(target_payload));
    }
 
    return true;
  }
 
  void generate_opmon_data() override {
      
    if(m_dropped_packets != 0) {
        ers::warning(FailedToSendData(ERS_HERE, m_sink_id, m_dropped_packets));
    }
 
    opmon::SourceInfo info;
    info.set_dropped_frames( m_dropped_packets.load() ); 
 
    publish( std::move(info) );
  }
  
private:
  // Sink internals
  std::string m_sink_id;
  bool m_sink_is_set{ false };
  std::shared_ptr<sink_t> m_sink_queue;
 
  // Callback internals
  bool m_callback_mode;
  bool m_callback_is_acquired{ false };
  using sink_cb_t = std::shared_ptr<std::function<void(TargetPayloadType&&)>>;
  sink_cb_t m_sink_callback;
 
  std::atomic<uint64_t> m_dropped_packets{0};
 
};
 
} // namespace dunedaq::dpdklibs
 
#endif // DPDKLIBS_SRC_SOURCEMODEL_HPP_