Jungfraujoch/image_puller/ZMQImagePuller.h

// SPDX-FileCopyrightText: 2024 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#pragma once

#include <future>

#include "../common/ZMQWrappers.h"
#include "../common/Logger.h"
#include "../common/SpotToSave.h"
#include "../frame_serialize/CBORStream2Deserializer.h"
#include "../common/ThreadSafeFIFO.h"
#include "ImagePuller.h"



class ZMQImagePuller : public ImagePuller {
    const uint32_t default_receive_watermark = 100;
    const uint32_t default_repub_watermark = 220;

    // ZeroMQ receive timeout allows to check for abort value from time to time
    constexpr static auto ReceiveTimeout = std::chrono::milliseconds(100);
    constexpr static auto RepubTimeout = std::chrono::milliseconds(100);

    ZMQSocket socket;
    std::string addr;

    std::atomic<int> disconnect = 0;

    std::unique_ptr<ZMQSocket> repub_socket;

    ThreadSafeFIFO<ImagePullerOutput> cbor_fifo{200};
    ThreadSafeFIFO<ImagePullerOutput> repub_fifo{200};

    std::thread puller_thread;
    std::thread cbor_thread;
    std::thread repub_thread;

    void PullerThread();
    void CBORThread();
    void RepubThread();
    Logger logger{"ZMQImagePuller"};

    std::atomic<bool> suspend{false};
public:
    explicit ZMQImagePuller(
            const std::string &zmq_addr,
            const std::string &repub_address = "",
            const std::optional<int32_t> &rcv_watermark = {},
            const std::optional<int32_t> &repub_watermark = {});
    ~ZMQImagePuller();

    void Disconnect() override;

    void Suspend();
    void ResumeAndClear();
};