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/* * 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 * * * * 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/llm/llm_context.hpp" #include "morpheus/llm/llm_node_base.hpp" #include "morpheus/types.hpp" #include "morpheus/utilities/type_traits.hpp" #include <boost/type_traits/function_traits.hpp> #include <mrc/coroutines/task.hpp> #include <mrc/type_traits.hpp> #include <nlohmann/json_fwd.hpp> #include <functional> #include <memory> #include <string> #include <type_traits> #include <utility> #include <vector> namespace morpheus::llm { template <typename ReturnT, typename... ArgsT> class LLMLambdaNode : public LLMNodeBase { public: using function_t = std::function<Task<ReturnT>(ArgsT...)>; LLMLambdaNode(std::vector<std::string> input_names, function_t function) : m_input_names(std::move(input_names)), m_function(std::move(function)) {} std::vector<std::string> get_input_names() const override { return m_input_names; } Task<std::shared_ptr<LLMContext>> execute(std::shared_ptr<LLMContext> context) override { using args_tuple_t = std::tuple<ArgsT...>; if constexpr (std::tuple_size<args_tuple_t>::value == 0) { auto outputs = co_await this->m_function(); nlohmann::json outputs_json = std::move(outputs); // Set the outputs context->set_output(std::move(outputs_json)); co_return context; } else if constexpr (std::tuple_size<args_tuple_t>::value == 1) { const auto& arg = context->get_input(); auto output = co_await this->m_function(arg.view_json().get<std::tuple_element_t<0, args_tuple_t>>()); nlohmann::json outputs_json = std::move(output); // Set the outputs context->set_output(std::move(outputs_json)); co_return context; } else { auto args = context->get_inputs(); auto outputs = co_await this->m_function(args.view_json()); nlohmann::json outputs_json = std::move(outputs); // Set the outputs context->set_output(std::move(outputs_json)); co_return context; } } protected: std::vector<std::string> m_input_names; function_t m_function; }; template <typename ReturnT, typename... ArgsT> auto make_lambda_node(std::function<ReturnT(ArgsT...)>&& fn) { using function_t = std::function<ReturnT(ArgsT...)>; static_assert(utilities::is_specialization<typename function_t::result_type, mrc::coroutines::Task>::value, "Return type must be a Task"); using return_t = typename utilities::extract_value_type<typename function_t::result_type>::type; auto make_args = []<std::size_t... Is>(std::index_sequence<Is...>) { return std::vector<std::string>{std::string{"arg"} + std::to_string(Is)...}; }; return std::make_shared<LLMLambdaNode<return_t, ArgsT...>>(make_args(std::index_sequence_for<ArgsT...>{}), std::move(fn)); } template <typename FuncT> auto make_lambda_node(FuncT&& fn) { // Convert the incoming object to a function in case its a lambda or C* function pointer return make_lambda_node(std::function{std::forward<FuncT>(fn)}); } } // namespace morpheus::llm

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