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lmos-router-llm/src/main/kotlin/ai/ancf/lmos/router/llm/LangChainModelClient.kt
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| // SPDX-FileCopyrightText: 2024 Deutsche Telekom AG | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package ai.ancf.lmos.router.llm | ||
|
|
||
| import ai.ancf.lmos.router.core.* | ||
| import dev.langchain4j.data.message.AiMessage | ||
| import dev.langchain4j.model.anthropic.AnthropicChatModel | ||
| import dev.langchain4j.model.chat.ChatLanguageModel | ||
| import dev.langchain4j.model.chat.request.ResponseFormat | ||
| import dev.langchain4j.model.chat.request.ResponseFormatType | ||
| import dev.langchain4j.model.googleai.GoogleAiGeminiChatModel | ||
| import dev.langchain4j.model.ollama.OllamaChatModel | ||
| import dev.langchain4j.model.openai.OpenAiChatModel.OpenAiChatModelBuilder | ||
|
|
||
| /** | ||
| * A model client that uses Langchain4j(https://docs.langchain4j.dev/) to call a language model. | ||
| * | ||
| * @param chatLanguageModel The language model. | ||
| */ | ||
| class LangChainModelClient( | ||
| private val chatLanguageModel: ChatLanguageModel, | ||
| ) : ModelClient { | ||
| override fun call(messages: List<ChatMessage>): Result<ChatMessage, AgentRoutingSpecResolverException> { | ||
| try { | ||
| val response = | ||
| chatLanguageModel.generate( | ||
| messages.map { | ||
| when (it) { | ||
| is UserMessage -> dev.langchain4j.data.message.UserMessage(it.content) | ||
| is AssistantMessage -> AiMessage(it.content) | ||
| is SystemMessage -> dev.langchain4j.data.message.SystemMessage(it.content) | ||
| else -> throw AgentRoutingSpecResolverException("Unknown message type") | ||
| } | ||
| }, | ||
| ) | ||
| return Success(AssistantMessage(response.content().text())) | ||
| } catch (e: Exception) { | ||
| return Failure(AgentRoutingSpecResolverException("Failed to call language model", e)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * A factory class to create a Langchain4j language model client. The factory creates a client based on the given properties. | ||
| * | ||
| * The factory supports the following providers: | ||
| * - OPENAI | ||
| * - ANTHROPIC | ||
| * - GEMINI | ||
| * - OLLAMA | ||
| * - GROQ | ||
| * - OTHER (for other providers which are have OpenAI compatible API) | ||
| */ | ||
| class LangChainChatModelFactory private constructor() { | ||
| companion object { | ||
| fun createClient(properties: ModelClientProperties): ChatLanguageModel { | ||
| return when (properties.provider) { | ||
| LangChainClientProvider.OPENAI.name.lowercase(), | ||
| LangChainClientProvider.GROQ.name.lowercase(), | ||
| LangChainClientProvider.OTHER.name.lowercase(), | ||
| -> { | ||
| OpenAiChatModelBuilder().baseUrl(properties.url) | ||
| .apiKey(properties.apiKey) | ||
| .modelName(properties.model) | ||
| .maxTokens(properties.maxTokens) | ||
| .temperature(properties.temperature) | ||
| .responseFormat(properties.format) | ||
| .topP(properties.topP) | ||
| .build() | ||
| } | ||
|
|
||
| LangChainClientProvider.ANTHROPIC.name.lowercase() -> { | ||
| AnthropicChatModel.builder().baseUrl(properties.url) | ||
| .apiKey(properties.apiKey) | ||
| .modelName(properties.model) | ||
| .maxTokens(properties.maxTokens) | ||
| .temperature(properties.temperature) | ||
| .topP(properties.topP) | ||
| .topK(properties.topK) | ||
| .build() | ||
| } | ||
|
|
||
| LangChainClientProvider.GEMINI.name.lowercase() -> { | ||
| GoogleAiGeminiChatModel.builder() | ||
| .apiKey(properties.apiKey) | ||
| .modelName(properties.model) | ||
| .maxOutputTokens(properties.maxTokens) | ||
| .temperature(properties.temperature) | ||
| .topK(properties.topK) | ||
| .topP(properties.topP) | ||
| .responseFormat(ResponseFormat.builder().type(ResponseFormatType.valueOf(properties.format)).build()) | ||
| .build() | ||
| } | ||
|
|
||
| LangChainClientProvider.OLLAMA.name.lowercase() -> { | ||
| OllamaChatModel.builder().baseUrl(properties.url) | ||
| .modelName(properties.model) | ||
| .temperature(properties.temperature) | ||
| .build() | ||
| } | ||
|
|
||
| else -> { | ||
| throw IllegalArgumentException("Unknown model client properties: $properties") | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| enum class LangChainClientProvider { | ||
| OPENAI, | ||
| ANTHROPIC, | ||
| GEMINI, | ||
| OLLAMA, | ||
| GROQ, | ||
| OTHER, | ||
| } |
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