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BIGTOP-4209: Add backend API for AI Chat functionality (#55)
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104 changes: 104 additions & 0 deletions
104
...src/main/java/org/apache/bigtop/manager/ai/assistant/store/PersistentChatMemoryStore.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://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. | ||
| */ | ||
| package org.apache.bigtop.manager.ai.assistant.store; | ||
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| import org.apache.bigtop.manager.ai.core.enums.MessageSender; | ||
| import org.apache.bigtop.manager.dao.po.ChatMessagePO; | ||
| import org.apache.bigtop.manager.dao.po.ChatThreadPO; | ||
| import org.apache.bigtop.manager.dao.repository.ChatMessageDao; | ||
| import org.apache.bigtop.manager.dao.repository.ChatThreadDao; | ||
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| import dev.langchain4j.data.message.AiMessage; | ||
| import dev.langchain4j.data.message.ChatMessage; | ||
| import dev.langchain4j.data.message.ChatMessageType; | ||
| import dev.langchain4j.data.message.SystemMessage; | ||
| import dev.langchain4j.data.message.UserMessage; | ||
| import dev.langchain4j.store.memory.chat.ChatMemoryStore; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
|
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| public class PersistentChatMemoryStore implements ChatMemoryStore { | ||
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| private final ChatThreadDao chatThreadDao; | ||
| private final ChatMessageDao chatMessageDao; | ||
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| public PersistentChatMemoryStore(ChatThreadDao chatThreadDao, ChatMessageDao chatMessageDao) { | ||
| this.chatThreadDao = chatThreadDao; | ||
| this.chatMessageDao = chatMessageDao; | ||
| } | ||
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| private ChatMessage convertToChatMessage(ChatMessagePO chatMessagePO) { | ||
| String sender = chatMessagePO.getSender().toLowerCase(); | ||
| if (sender.equals(MessageSender.AI.getValue())) { | ||
| return new AiMessage(chatMessagePO.getMessage()); | ||
| } else if (sender.equals(MessageSender.USER.getValue())) { | ||
| return new UserMessage(chatMessagePO.getMessage()); | ||
| } else if (sender.equals(MessageSender.SYSTEM.getValue())) { | ||
| return new SystemMessage(chatMessagePO.getMessage()); | ||
| } else { | ||
| return null; | ||
| } | ||
| } | ||
|
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| private ChatMessagePO convertToChatMessagePO(ChatMessage chatMessage, Long chatThreadId) { | ||
| ChatMessagePO chatMessagePO = new ChatMessagePO(); | ||
| if (chatMessage.type().equals(ChatMessageType.AI)) { | ||
| chatMessagePO.setSender(MessageSender.AI.getValue()); | ||
| AiMessage aiMessage = (AiMessage) chatMessage; | ||
| chatMessagePO.setMessage(aiMessage.text()); | ||
| } else if (chatMessage.type().equals(ChatMessageType.USER)) { | ||
| chatMessagePO.setSender(MessageSender.USER.getValue()); | ||
| UserMessage userMessage = (UserMessage) chatMessage; | ||
| chatMessagePO.setMessage(userMessage.singleText()); | ||
| } else if (chatMessage.type().equals(ChatMessageType.SYSTEM)) { | ||
| chatMessagePO.setSender(MessageSender.SYSTEM.getValue()); | ||
| SystemMessage systemMessage = (SystemMessage) chatMessage; | ||
| chatMessagePO.setMessage(systemMessage.text()); | ||
| } else { | ||
| chatMessagePO.setSender(chatMessage.type().toString()); | ||
| } | ||
| ChatThreadPO chatThreadPO = chatThreadDao.findById(chatThreadId); | ||
| chatMessagePO.setUserId(chatThreadPO.getUserId()); | ||
| chatMessagePO.setThreadId(chatThreadId); | ||
| return chatMessagePO; | ||
| } | ||
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| @Override | ||
| public List<ChatMessage> getMessages(Object threadId) { | ||
| List<ChatMessagePO> chatMessages = chatMessageDao.findAllByThreadId((Long) threadId); | ||
| if (chatMessages.isEmpty()) { | ||
| return new ArrayList<>(); | ||
| } else { | ||
| return chatMessages.stream().map(this::convertToChatMessage).collect(Collectors.toList()); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void updateMessages(Object threadId, List<ChatMessage> messages) { | ||
| ChatMessagePO chatMessagePO = convertToChatMessagePO(messages.get(messages.size() - 1), (Long) threadId); | ||
| chatMessageDao.save(chatMessagePO); | ||
| } | ||
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| @Override | ||
| public void deleteMessages(Object threadId) { | ||
| chatMessageDao.deleteByThreadId((Long) threadId); | ||
| } | ||
| } |
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