LLM-Assisted Legacy System Migration to Modern Java

Join Adam Bien (linkedin.com/in/adam-bien) for a hands-on workshop on turning legacy Java into maintainable, standards-based, zero-dependency code. Learn how to extract specs and tests from existing applications, then migrate incrementally to modern JDKs, BCE, and MicroProfile (Quarkus) letting LLMs and agents do the mechanical work while tests serve as verification loops.

Learn how to (checkout full agenda: https://workshops.adam-bien.com/llm-assisted-legacy-system-migration-to-modern-java.htm):

• Reverse-engineering intent from undocumented legacy code
• Extracting the ubiquitous language from legacy code
• Ubiquitous language as migration compass: naming BCs, boundaries and entities
• Capturing the structure of existing databases with custom MCPs: exposing schemas to LLMs for context-aware migration
• Extracting characterization tests from existing applications: verification loops for the migration
• Spec-driven BCE (say "Space") migrations with SBCE
• LLM-assisted creation of OpenRewrite rules: generating recipes for repeatable, large-scale migrations
• Defining custom skills to capture transformation rules: reusable, shareable migration knowledge for developers and agents
• Automating migrations with purpose-built agents
• Pruning dependencies and custom frameworks for security, productivity and maintainability
• Migrating custom-grown frameworks to Java SE and LLM-friendly standards with stable APIs and normative specifications (e.g. MicroProfile)
• Replacing external dependencies with standards: more security, less maintenance
• Traceability: mapping legacy components to their migrated counterparts for auditable, verifiable migrations

• (TBD)

Full agenda: https://workshops.adam-bien.com/llm-assisted-legacy-system-migration-to-modern-java.htm