AI-Powered Code Review Assistant: Automated Code Analysis with Spring AI and MongoDB

A step-by-step guide to building an AI-powered code review API using Java 21, Spring Boot, Spring AI, and MongoDB Atlas. Developers submit code snippets via a REST endpoint; the system generates embeddings with OpenAI's text-embedding-3-small model, performs vector search against a library of known anti-patterns stored in MongoDB Atlas, and sends matched patterns plus the code to GPT-4o-mini for structured review feedback. Each submission and its findings are persisted in MongoDB, and aggregation pipelines expose trend analytics by category, severity, and top recurring patterns.