adamdebreceni commented on code in PR #1987: URL: https://github.com/apache/nifi-minifi-cpp/pull/1987#discussion_r2526252168
########## libminifi/src/minifi-c.cpp: ########## @@ -0,0 +1,502 @@ +/** +* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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. + */ + +#include "minifi-c/minifi-c.h" + +#include <memory> +#include <vector> + +#include "agent/agent_docs.h" +#include "core/ProcessorMetrics.h" +#include "minifi-cpp/core/Annotation.h" +#include "minifi-cpp/core/ClassLoader.h" +#include "minifi-cpp/core/ProcessContext.h" +#include "minifi-cpp/core/ProcessSession.h" +#include "minifi-cpp/core/ProcessorApi.h" +#include "minifi-cpp/core/ProcessorDescriptor.h" +#include "minifi-cpp/core/ProcessorFactory.h" +#include "minifi-cpp/core/ProcessorMetadata.h" +#include "minifi-cpp/core/PropertyValidator.h" +#include "minifi-cpp/core/logging/Logger.h" +#include "minifi-cpp/core/state/PublishedMetricProvider.h" +#include "minifi-cpp/Exception.h" +#include "minifi-cpp/core/extension/ExtensionManager.h" +#include "utils/PropertyErrors.h" +#include "minifi-cpp/agent/build_description.h" +#include "utils/CProcessor.h" + +namespace minifi = org::apache::nifi::minifi; + +namespace { + +std::string toString(MinifiStringView sv) { + return {sv.data, sv.length}; +} + +std::string_view toStringView(MinifiStringView sv) { + return {sv.data, sv.length}; +} + +minifi::core::annotation::Input toInputRequirement(MinifiInputRequirement req) { + switch (req) { + case MINIFI_INPUT_REQUIRED: return minifi::core::annotation::Input::INPUT_REQUIRED; + case MINIFI_INPUT_ALLOWED: return minifi::core::annotation::Input::INPUT_ALLOWED; + case MINIFI_INPUT_FORBIDDEN: return minifi::core::annotation::Input::INPUT_FORBIDDEN; + } + gsl_FailFast(); +} + +minifi::core::logging::LOG_LEVEL toLogLevel(MinifiLogLevel lvl) { + switch (lvl) { + case MINIFI_TRACE: return minifi::core::logging::trace; + case MINIFI_DEBUG: return minifi::core::logging::debug; + case MINIFI_INFO: return minifi::core::logging::info; + case MINIFI_WARNING: return minifi::core::logging::warn; + case MINIFI_ERROR: return minifi::core::logging::err; + case MINIFI_CRITICAL: return minifi::core::logging::critical; + case MINIFI_OFF: return minifi::core::logging::off; + } + gsl_FailFast(); +} + +minifi::core::Property createProperty(const MinifiProperty* property_description) { + gsl_Expects(property_description); + std::vector<std::string_view> allowed_values; + allowed_values.reserve(property_description->allowed_values_count); + for (size_t i = 0; i < property_description->allowed_values_count; ++i) { + allowed_values.push_back(toStringView(property_description->allowed_values_ptr[i])); + } + std::vector<std::string_view> allowed_types; + allowed_types.reserve(property_description->types_count); + for (size_t i = 0; i < property_description->types_count; ++i) { + allowed_types.push_back(toStringView(property_description->types_ptr[i])); + } + std::vector<std::string_view> dependent_properties; + dependent_properties.reserve(property_description->dependent_properties_count); + for (size_t i = 0; i < property_description->dependent_properties_count; ++i) { + dependent_properties.push_back(toStringView(property_description->dependent_properties_ptr[i])); + } + std::vector<std::pair<std::string_view, std::string_view>> exclusive_of_properties; + exclusive_of_properties.reserve(property_description->exclusive_of_properties_count); + for (size_t i = 0; i < property_description->exclusive_of_properties_count; ++i) { + exclusive_of_properties.push_back({toStringView(property_description->exclusive_of_property_names_ptr[i]), toStringView(property_description->exclusive_of_property_values_ptr[i])}); + } + std::optional<std::string_view> default_value; + if (property_description->default_value) { + default_value = toStringView(*property_description->default_value); + } + return minifi::core::Property{minifi::core::PropertyReference{ + toStringView(property_description->name), + toStringView(property_description->display_name), + toStringView(property_description->description), + static_cast<bool>(property_description->is_required), + static_cast<bool>(property_description->is_sensitive), + std::span(allowed_values), + std::span(allowed_types), + std::span(dependent_properties), + std::span(exclusive_of_properties), + default_value, + gsl::make_not_null(reinterpret_cast<const minifi::core::PropertyValidator*>(property_description->validator)), + static_cast<bool>(property_description->supports_expression_language) + }}; +} + +class CProcessorFactory : public minifi::core::ProcessorFactory { + public: + CProcessorFactory(std::string group_name, std::string class_name, minifi::utils::CProcessorClassDescription class_description) + : group_name_(std::move(group_name)), + class_name_(std::move(class_name)), + class_description_(std::move(class_description)) {} + std::unique_ptr<minifi::core::ProcessorApi> create(minifi::core::ProcessorMetadata metadata) override { + return std::make_unique<minifi::utils::CProcessor>(class_description_, metadata); + } + + [[nodiscard]] std::string getGroupName() const override { + return group_name_; + } + + [[nodiscard]] std::string getClassName() const override { + return class_name_; + } + + CProcessorFactory() = delete; + CProcessorFactory(const CProcessorFactory&) = delete; + CProcessorFactory& operator=(const CProcessorFactory&) = delete; + CProcessorFactory(CProcessorFactory&&) = delete; + CProcessorFactory& operator=(CProcessorFactory&&) = delete; + ~CProcessorFactory() override = default; + + private: + std::string group_name_; + std::string class_name_; + minifi::utils::CProcessorClassDescription class_description_; +}; + +class CExtension : public minifi::core::extension::Extension { + public: + CExtension(std::string name, MinifiBool(*initializer)(void*, MinifiConfigure), void* user_data): name_(std::move(name)), initializer_(initializer), user_data_(user_data) {} + bool initialize(const minifi::core::extension::ExtensionConfig& config) override { + gsl_Assert(initializer_); + return static_cast<bool>(initializer_(user_data_, reinterpret_cast<MinifiConfigure>(config.get()))); + } + + [[nodiscard]] const std::string& getName() const override { + return name_; + } + + private: + std::string name_; + MinifiBool(*initializer_)(void*, MinifiConfigure); Review Comment: since the extension loading revamp, there aren't really such function pointers anymore -- This is an automated message from the Apache Git Service. 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