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Refactor chat history & system prompt handling & Store RAG sources in…
… history Signed-off-by: Florian Hotze <[email protected]>
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142 changes: 142 additions & 0 deletions
142
src/main/java/com/github/llamara/ai/internal/chat/ChatModel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| /* | ||
| * #%L | ||
| * llamara-backend | ||
| * %% | ||
| * Copyright (C) 2024 - 2025 Contributors to the LLAMARA project | ||
| * %% | ||
| * 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. | ||
| * #L% | ||
| */ | ||
| package com.github.llamara.ai.internal.chat; | ||
|
|
||
| import com.github.llamara.ai.config.chat.ChatModelConfig; | ||
| import com.github.llamara.ai.internal.MetadataKeys; | ||
| import com.github.llamara.ai.internal.chat.history.ChatHistoryStore; | ||
| import com.github.llamara.ai.internal.chat.history.ChatMessageRecord; | ||
| import com.github.llamara.ai.internal.chat.response.ChatResponseRecord; | ||
| import com.github.llamara.ai.internal.chat.response.RagSourceRecord; | ||
|
|
||
| import java.time.Instant; | ||
| import java.util.List; | ||
| import java.util.UUID; | ||
|
|
||
| import dev.langchain4j.data.message.ChatMessageType; | ||
| import dev.langchain4j.service.Result; | ||
|
|
||
| /** | ||
| * The {@link ChatModel} provides the interface to chat with the chat models. It takes care of | ||
| * storing the chat history, if enabled, and applies the system prompt, if enabled. | ||
| * | ||
| * @author Florian Hotze - Initial contribution | ||
| */ | ||
| public class ChatModel { | ||
| private final ChatModelConfig.ModelConfig config; | ||
| private final AiService aiService; | ||
| private final ChatHistoryStore historyStore; | ||
|
|
||
| public ChatModel( | ||
| ChatModelConfig.ModelConfig config, | ||
| AiService aiService, | ||
| ChatHistoryStore historyStore) { | ||
| this.config = config; | ||
| this.aiService = aiService; | ||
| this.historyStore = historyStore; | ||
| } | ||
|
|
||
| /** | ||
| * Send a prompt to a chat model and get the response. | ||
| * | ||
| * @param sessionId the session ID | ||
| * @param history whether to save the conversation to the chat history | ||
| * @param prompt the prompt to send to the chat model | ||
| * @return the response from the chat model | ||
| */ | ||
| public ChatResponseRecord chat(UUID sessionId, boolean history, String prompt) { | ||
| if (history) { | ||
| storePrompt(sessionId, prompt); | ||
| } | ||
|
|
||
| Result<String> result; | ||
| if (config.systemPromptEnabled()) { | ||
| result = aiService.chat(sessionId, prompt); | ||
| } else { | ||
| result = aiService.chatWithoutSystemMessage(sessionId, prompt); | ||
| } | ||
| ChatResponseRecord response = | ||
| new ChatResponseRecord( | ||
| result.content(), getSourcesFromResult(result, result.content())); | ||
|
|
||
| if (history) { | ||
| storeResponse(sessionId, response); | ||
| } | ||
|
|
||
| return response; | ||
| } | ||
|
|
||
| /** | ||
| * Get the sources from the result. Filters out sources that were not used by the chat model to | ||
| * generate the response. | ||
| * | ||
| * @param result the {@link Result} from the chat model | ||
| * @param text the text of the response | ||
| * @return the sources used by the chat model to generate the response | ||
| */ | ||
| private List<RagSourceRecord> getSourcesFromResult(Result<?> result, String text) { | ||
| return result.sources().stream() | ||
| .map(dev.langchain4j.rag.content.Content::textSegment) | ||
| .filter(ts -> text.contains(ts.metadata().getString(MetadataKeys.KNOWLEDGE_ID))) | ||
| .map( | ||
| ts -> | ||
| new RagSourceRecord( | ||
| ts.metadata().getUUID(MetadataKeys.KNOWLEDGE_ID), | ||
| ts.text())) | ||
| .toList(); | ||
| } | ||
|
|
||
| /** | ||
| * Store the prompt in the chat history. | ||
| * | ||
| * @param sessionId the session ID | ||
| * @param prompt the prompt to store | ||
| */ | ||
| private void storePrompt(UUID sessionId, String prompt) { | ||
| historyStore | ||
| .addMessage( | ||
| sessionId, | ||
| new ChatMessageRecord( | ||
| ChatMessageType.USER, prompt, Instant.now(), null, null, null)) | ||
| .subscribe() | ||
| .with(item -> {}, failure -> {}); | ||
| } | ||
|
|
||
| /** | ||
| * Store the response in the chat history. | ||
| * | ||
| * @param sessionId the session ID | ||
| * @param response the response to store | ||
| */ | ||
| private void storeResponse(UUID sessionId, ChatResponseRecord response) { | ||
| historyStore | ||
| .addMessage( | ||
| sessionId, | ||
| new ChatMessageRecord( | ||
| ChatMessageType.AI, | ||
| response.response(), | ||
| Instant.now(), | ||
| response.sources(), | ||
| config.provider(), | ||
| config.model())) | ||
| .subscribe() | ||
| .with(item -> {}, failure -> {}); | ||
| } | ||
| } |
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74 changes: 0 additions & 74 deletions
74
...main/java/com/github/llamara/ai/internal/chat/aiservice/DelegatingChatModelAiService.java
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