lburgazzoli commented on code in PR #13341: URL: https://github.com/apache/camel/pull/13341#discussion_r1511145035
########## components/camel-ai/camel-langchain/src/main/java/org/apache/camel/component/langchain/service/Langchain4jChatHandler.java: ########## @@ -0,0 +1,132 @@ +/* + * 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. + */ +package org.apache.camel.component.langchain.service; + +import java.util.List; +import java.util.Map; + +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.model.chat.ChatLanguageModel; +import dev.langchain4j.model.input.Prompt; +import dev.langchain4j.model.input.PromptTemplate; +import dev.langchain4j.model.output.Response; + +public class Langchain4jChatHandler { + + ChatLanguageModel chatLanguageModel; + + public Langchain4jChatHandler(ChatLanguageModel chatLanguageModel) { + this.chatLanguageModel = chatLanguageModel; + } + + /** + * Send one simple message + * + * @param message + * @return + */ + public String sendMessage(String message) { + return this.chatLanguageModel.generate(message); + } + + public String sendWithPromptTemplate(String promptTemplate, Map<String, Object> variables) { + PromptTemplate template = PromptTemplate.from(promptTemplate); + Prompt prompt = template.apply(variables); + return this.sendMessage(prompt.text()); + } + + public String sendWithPromptTemplate( + String promptTemplate, Map<String, Object> variables, ChatMessageType chatMessageType) { + PromptTemplate template = PromptTemplate.from(promptTemplate); + Prompt prompt = template.apply(variables); + return this.sendMessage(prompt.text(), chatMessageType); + } + + /** + * Send a simple message, for a specific Chat Message Type + * + * @param message + * @param type + * @return + */ + public String sendMessage(String message, ChatMessageType type) { + ChatMessage[] chatMessages = { convertChatMessages(type, message) }; + return this.sendMessage(chatMessages); + } + + /** + * Send a List of Messages + * + * @param type + * @param messages + * @return + */ + public String sendMessages(ChatMessageType type, List<String> messages) { + + var chatMessages = messages.stream() + .map(message -> (ChatMessage) convertChatMessages(type, message)) + .toArray(ChatMessage[]::new); + + return sendMessage(chatMessages); + } + + /** + * Create the messages in the format of Langchain4j ChatMessage + * + * @param type + * @param message + * @return + */ + private ChatMessage convertChatMessages(ChatMessageType type, String message) { + return switch (type) { + case USER -> new UserMessage(message); + case AI -> new AiMessage(message); + case SYSTEM -> new SystemMessage(message); + case TOOL_EXECUTION_RESULT -> throw new IllegalArgumentException("Tools are currently not supported"); + }; + + } + + /** + * Send And Array of ChatMessages + * + * @param messages + * @return + */ + public String sendMessage(ChatMessage... messages) { Review Comment: not sure if this intended but since this is a varrg, the method can be invoked without parameters -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@camel.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
