Program Listing for File write_to_file.hpp

            

            
#pragma once

#include "morpheus/messages/meta.hpp"
#include "morpheus/objects/file_types.hpp"

#include <mrc/channel/status.hpp>// for Status
#include <mrc/node/sink_properties.hpp>// for SinkProperties<>::sink_type_t
#include <mrc/node/source_properties.hpp>// for SourceProperties<>::source_type_t
#include <mrc/segment/builder.hpp>
#include <mrc/segment/object.hpp>// for Object
#include <pymrc/node.hpp>
#include <rxcpp/rx.hpp>

#include <fstream>
#include <functional>// for function
#include <memory>
#include <string>
#include <vector>

namespace morpheus {
/****** Component public implementations *******************/
/****** WriteToFileStage********************************/

#pragma GCC visibility push(default)
class WriteToFileStage : public mrc::pymrc::PythonNode<std::shared_ptr<MessageMeta>, std::shared_ptr<MessageMeta>>
{
  public:
    using base_t = mrc::pymrc::PythonNode<std::shared_ptr<MessageMeta>, std::shared_ptr<MessageMeta>>;
    using typename base_t::sink_type_t;
    using typename base_t::source_type_t;
    using typename base_t::subscribe_fn_t;

    WriteToFileStage(const std::string &filename,
                     std::ios::openmode mode = std::ios::out,
                     FileTypes file_type     = FileTypes::Auto,
                     bool include_index_col  = true);

  private:
    void close();

    void write_json(sink_type_t &msg);

    void write_csv(sink_type_t &msg);

    subscribe_fn_t build_operator();

    bool m_is_first{};
    bool m_include_index_col;
    std::ofstream m_fstream;
    std::function<void(sink_type_t &)> m_write_func;
};

/****** WriteToFileStageInterfaceProxy******************/
struct WriteToFileStageInterfaceProxy
{
    static std::shared_ptr<mrc::segment::Object<WriteToFileStage>> init(mrc::segment::Builder& builder,
                                                                        const std::string& name,
                                                                        const std::string& filename,
                                                                        const std::string& mode = "w",
                                                                        FileTypes file_type     = FileTypes::Auto,
                                                                        bool include_index_col  = true);
};

#pragma GCC visibility pop// end of group
}  // namespace morpheus