Some code snippets for my blogs (see here). If you are interested in langchain4j, I would recommend to take a look at langchain4j examples
This project contains some spring boot junit tests for the langchain4j framework. Models for test can be configured via application.yaml, those will be auto-pulled in the configured ollama instance by default if needed.
Main beef is in the test classes themselves. So check the src/test/java folder for various use cases. More examples can be found as mentioned in the langchain4j-examples directly.
Some of the tests include:
- simple RAG chat bot
- chat with memory (history)
- Java Pojo extraction
- Image recognition
- Tests with VectorDB (in-memory + external pgvector if enabled)
- FunctionCalling
- ...
In the docker folder, a docker-compose.yaml can be found to start a local Ollama instance. Also a PGVector Postgres DB and OpenWebUI is contained.
As mentioned, simply run the test classes under src/test/java. If a local docker is running, the test should run without problems. Required models will be pulled automatically if needed (this can be disabled via application.yaml).