Program Listing for File file_source.hpp

            

            
/*
* SPDX-FileCopyrightText: Copyright (c) 2021-2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#pragma once

#include "morpheus/export.h"
#include "morpheus/messages/meta.hpp"

#include <boost/fiber/context.hpp>
#include <mrc/segment/builder.hpp>
#include <mrc/segment/object.hpp>
#include <pybind11/pytypes.h>
#include <pymrc/node.hpp>
#include <rxcpp/rx.hpp> // for apply, make_subscriber, observable_member, is_on_error<>::not_void, is_on_next_of<>::not_void, trace_activity

#include <filesystem> // for path
#include <memory>
#include <optional>
#include <string>
#include <thread>
#include <vector>

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

class MORPHEUS_EXPORT FileSourceStage : public mrc::pymrc::PythonSource<std::shared_ptr<MessageMeta>>
{
  public:
    using base_t = mrc::pymrc::PythonSource<std::shared_ptr<MessageMeta>>;
    using typename base_t::source_type_t;
    using typename base_t::subscriber_fn_t;

    FileSourceStage(std::string filename,
                    int repeat                                   = 1,
                    bool filter_null                             = true,
                    std::vector<std::string> filter_null_columns = {},
                    std::optional<bool> json_lines               = std::nullopt);

  private:
    subscriber_fn_t build();

    std::string m_filename;
    int m_repeat{1};
    bool m_filter_null{true};
    std::vector<std::string> m_filter_null_columns;
    std::optional<bool> m_json_lines;
};

/****** FileSourceStageInterfaceProxy***********************/
struct MORPHEUS_EXPORT FileSourceStageInterfaceProxy
{
    static std::shared_ptr<mrc::segment::Object<FileSourceStage>> init(
        mrc::segment::Builder& builder,
        const std::string& name,
        std::string filename,
        int repeat                                   = 1,
        bool filter_null                             = true,
        std::vector<std::string> filter_null_columns = {},
        pybind11::dict parser_kwargs                 = pybind11::dict());
    static std::shared_ptr<mrc::segment::Object<FileSourceStage>> init(
        mrc::segment::Builder& builder,
        const std::string& name,
        std::filesystem::path filename,
        int repeat                                   = 1,
        bool filter_null                             = true,
        std::vector<std::string> filter_null_columns = {},
        pybind11::dict parser_kwargs                 = pybind11::dict());
};  // end of group
}  // namespace morpheus