Program Listing for File http_server_source_stage.hpp

            

            
/*
* SPDX-FileCopyrightText: Copyright (c) 2023-2024, 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" // for exporting symbols
#include "morpheus/messages/meta.hpp" // for MessageMeta
#include "morpheus/utilities/http_server.hpp" // for HttpServer

#include <boost/fiber/buffered_channel.hpp> // for buffered_channel
#include <boost/fiber/context.hpp> // for context
#include <cudf/io/types.hpp> // for table_with_metadata
#include <mrc/segment/builder.hpp> // for segment::Builder
#include <mrc/segment/object.hpp> // for segment::Object
#include <pymrc/node.hpp> // for PythonSource
#include <rxcpp/rx.hpp> // for subscriber

#include <atomic> // for atomic
#include <chrono> // for duration
#include <cstddef> // for size_t
#include <cstdint> // for int64_t
#include <memory> // for shared_ptr & unique_ptr
#include <string> // for string & to_string
// IWYU thinks we're using thread::operator<<
// IWYU pragma: no_include <thread>

namespace morpheus {
using table_t         = std::unique_ptr<cudf::io::table_with_metadata>;
using request_queue_t = boost::fibers::buffered_channel<table_t>;

/****** Component public implementations *******************/
/****** HttpServerSourceStage *************************************/

// TODO(dagardner): optionally add headers to the dataframe

class MORPHEUS_EXPORT HttpServerSourceStage : 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;

    HttpServerSourceStage(std::string bind_address             = "127.0.0.1",
                          unsigned short port                  = 8080,
                          std::string endpoint                 = "/message",
                          std::string live_endpoint            = "/live",
                          std::string ready_endpoint           = "/ready",
                          std::string method                   = "POST",
                          std::string live_method              = "GET",
                          std::string ready_method             = "GET",
                          unsigned accept_status               = 201,
                          float sleep_time                     = 0.1f,
                          long queue_timeout                   = 5,
                          std::size_t max_queue_size           = 1024,
                          unsigned short num_server_threads    = 1,
                          std::size_t max_payload_size         = DefaultMaxPayloadSize,
                          std::chrono::seconds request_timeout = std::chrono::seconds(30),
                          bool lines                           = false,
                          std::size_t stop_after               = 0);
    ~HttpServerSourceStage() override;

    void close();

  private:
    subscriber_fn_t build();
    void source_generator(rxcpp::subscriber<source_type_t> subscriber);

    std::atomic<int> m_queue_cnt = 0;
    std::chrono::steady_clock::duration m_sleep_time;
    std::chrono::duration<long> m_queue_timeout;
    std::unique_ptr<HttpServer> m_server;
    request_queue_t m_queue;
    std::size_t m_max_queue_size;
    std::size_t m_stop_after;
    std::size_t m_records_emitted;
};

/****** HttpServerSourceStageInterfaceProxy***********************/
struct MORPHEUS_EXPORT HttpServerSourceStageInterfaceProxy
{
    static std::shared_ptr<mrc::segment::Object<HttpServerSourceStage>> init(mrc::segment::Builder& builder,
                                                                             const std::string& name,
                                                                             std::string bind_address,
                                                                             unsigned short port,
                                                                             std::string endpoint,
                                                                             std::string live_endpoint,
                                                                             std::string ready_endpoint,
                                                                             std::string method,
                                                                             std::string live_method,
                                                                             std::string ready_method,
                                                                             unsigned accept_status,
                                                                             float sleep_time,
                                                                             long queue_timeout,
                                                                             std::size_t max_queue_size,
                                                                             unsigned short num_server_threads,
                                                                             std::size_t max_payload_size,
                                                                             int64_t request_timeout,
                                                                             bool lines,
                                                                             std::size_t stop_after);
};  // end of group
}  // namespace morpheus