Introduction to OpenRewrite

The Challenge

Most teams know their code needs cleanup and consistency, but doing it by hand doesn’t scale. To use OpenRewrite effectively, you first need to understand how it parses, analyzes, and transforms source code — starting with core concepts like Lossless Semantic Trees and recipes. Without that foundation, it’s hard to run changes confidently or customize existing rules.

Why Attend

If you’re new to OpenRewrite, this session gives you a clear, practical foundation. No prior experience required — just bring a local dev environment and follow along step-by-step.

What You'll Learn

• Key OpenRewrite concepts
• How to set up your CLI and build an LST
• How to find and run existing recipes
• How to set up a local recipe development environment
• How to compose and customize existing recipes