vertx-expert

Keyword: vertx | Platforms: gemini,claude,codex

Reactive Foundation Expert Skill - Specialized in the Eclipse Vert.x event-driven ecosystem.

Core Mandates

• Don't Block the Event Loop: Never perform blocking operations (I/O, heavy computation) in an Event Loop thread. Use executeBlocking() if needed.
• Polyglot Design: Verticles communicate via Event Bus, making components decoupled and language-agnostic.
• Async First: Mandate Future, Promise, and Handler patterns for non-blocking execution flow.
• Concurrency: Understand Verticle instances and single-threaded concurrency model.

Reactive Vert.x Components

• Vert.x Web: Building high-performance, non-blocking HTTP APIs.
• Event Bus: Distributed messaging system for horizontal scaling.
• Reactive Clients: Using MySQL, PostgreSQL, Redis, and Kafka clients without blocking threads.
• Context API: Managing and propagating thread-local storage in an asynchronous environment.