Program Listing for File kafka_source.hpp

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/* * SPDX-FileCopyrightText: Copyright (c) 2021-2023, 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 * * * * 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/messages/meta.hpp" #include "morpheus/types.hpp" #include <boost/fiber/future/future.hpp> #include <cudf/io/types.hpp> #include <librdkafka/rdkafkacpp.h> #include <mrc/node/rx_sink_base.hpp> #include <mrc/node/rx_source_base.hpp> #include <mrc/node/source_properties.hpp> #include <mrc/segment/builder.hpp> #include <mrc/segment/object.hpp> #include <mrc/types.hpp> #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 <cstdint> // for uuint32_t #include <map> #include <memory> #include <string> #include <vector> namespace morpheus { /****** Component public implementations *******************/ /****** KafkaSourceStage************************************/ #pragma GCC visibility push(default) class KafkaSourceStage : 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; KafkaSourceStage(TensorIndex max_batch_size, std::string topic, uint32_t batch_timeout_ms, std::map<std::string, std::string> config, bool disable_commit = false, bool disable_pre_filtering = false, TensorIndex stop_after = 0, bool async_commits = true); ~KafkaSourceStage() override = default; TensorIndex max_batch_size(); uint32_t batch_timeout_ms(); private: subscriber_fn_t build(); std::unique_ptr<RdKafka::Conf> build_kafka_conf(const std::map<std::string, std::string>& config_in); std::unique_ptr<RdKafka::KafkaConsumer> create_consumer(RdKafka::RebalanceCb& rebalancer); cudf::io::table_with_metadata load_table(const std::string& buffer); std::shared_ptr<morpheus::MessageMeta> process_batch( std::vector<std::unique_ptr<RdKafka::Message>>&& message_batch); TensorIndex m_max_batch_size{128}; uint32_t m_batch_timeout_ms{100}; std::string m_topic; std::map<std::string, std::string> m_config; bool m_disable_commit{false}; bool m_disable_pre_filtering{false}; bool m_requires_commit{false}; // Whether or not manual committing is required bool m_async_commits{true}; TensorIndex m_stop_after{0}; void* m_rebalancer; }; /****** KafkaSourceStageInferenceProxy**********************/ struct KafkaSourceStageInterfaceProxy { static std::shared_ptr<mrc::segment::Object<KafkaSourceStage>> init(mrc::segment::Builder& builder, const std::string& name, TensorIndex max_batch_size, std::string topic, uint32_t batch_timeout_ms, std::map<std::string, std::string> config, bool disable_commit, bool disable_pre_filtering, TensorIndex stop_after = 0, bool async_commits = true); }; #pragma GCC visibility pop// end of group } // namespace morpheus

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