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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 * * 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/io/data_loader.hpp" #include <glog/logging.h> #include <mrc/utils/type_utils.hpp> #include <pybind11/pybind11.h> #include <functional> #include <iostream> #include <map> #include <memory> #include <mutex> #include <string> namespace morpheus { #pragma GCC visibility push(default) template <typename ObjectReturnTypeT> class FactoryRegistry { public: static bool contains(const std::string& name) { std::lock_guard<decltype(m_mutex)> lock(m_mutex); return m_object_constructors.count(name) > 0; } static std::vector<std::string> list() { std::lock_guard<decltype(m_mutex)> lock(m_mutex); std::vector<std::string> names; for (const auto& [name, _] : m_object_constructors) { names.push_back(name); } return names; } static std::shared_ptr<ObjectReturnTypeT> create_object_from_factory(const std::string& name, nlohmann::json config = {}) { std::lock_guard<decltype(m_mutex)> lock(m_mutex); VLOG(2) << "Retrieving factory constructor: " << name << "(" << mrc::type_name<ObjectReturnTypeT>() << ")"; if (m_object_constructors.count(name) == 0) { throw std::runtime_error("Unknown data loader: " + name); } return m_object_constructors[name](config); } static void register_factory_fn(const std::string& name, const std::function<std::shared_ptr<ObjectReturnTypeT>(nlohmann::json)>& loader_fn, bool throw_if_exists = true) { std::lock_guard<decltype(m_mutex)> lock(m_mutex); VLOG(2) << "Registering factory constructor: " << name << "(" << mrc::type_name<ObjectReturnTypeT>() << ")"; if (m_object_constructors.count(name) > 0) { if (throw_if_exists) { throw std::runtime_error("Duplicate data loader registration: " + name); } } m_object_constructors[name] = loader_fn; } static void unregister_factory_fn(const std::string& name, bool throw_if_missing = true) { std::lock_guard<decltype(m_mutex)> lock(m_mutex); VLOG(2) << "Un-registering factory constructor: " << name << "(" << mrc::type_name<ObjectReturnTypeT>() << ")"; if (m_object_constructors.count(name) == 0) { if (throw_if_missing) { throw std::runtime_error("Unknown data loader: " + name); } return; } m_object_constructors.erase(name); } private: static std::mutex m_mutex; static std::map<std::string, std::function<std::shared_ptr<ObjectReturnTypeT>(nlohmann::json)>> m_object_constructors; }; template <typename ObjectReturnTypeT> std::mutex FactoryRegistry<ObjectReturnTypeT>::m_mutex; template <typename ObjectReturnTypeT> std::map<std::string, std::function<std::shared_ptr<ObjectReturnTypeT>(nlohmann::json)>> FactoryRegistry<ObjectReturnTypeT>::m_object_constructors; #pragma GCC visibility pop } // namespace morpheus

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