Java AI library comparison app

This app is an AI-powered customer support application that:

• Has access to terms and conditions (retrieval augmented generation, RAG)
• Can access tools (Java methods) to perform actions
• Uses an LLM to interact with the user

The application includes implementations for:

• LangChain4j in the langchain4j package
• Spring AI in the springai package (thanks to @tzolov!)

The UI is built using Vaadin Hilla and the backend is built using Spring Boot.

Requirements

• Java 17+
• OpenAI API key in OPENAI_API_KEY environment variable

Running

Run the app by running Application.java in your IDE or mvn in the command line.

Thanks

This demo was inspired by the LangChain4jCustomer Support Agent example.

I want to thank the LangChain4j and Spring AI teams for their support in building this demo. Especially, I want to thank @tzolov from The Spring AI team for his help in building the Spring AI implementation.