Question 1

How to create a simple web server with Ratpack?

Accepted Answer

Ratpack uses a handler-based architecture; define routes in a main Java or Groovy class using the routing DSL. The quickstart guide on ratpack.io provides step-by-step instructions, including Gradle setup and basic handler examples.

Question 2

Ratpack vs Spring Boot for microservices?

Accepted Answer

Spring Boot offers a comprehensive ecosystem with auto-configuration and many built-in features, while Ratpack provides a leaner, more performant base focused on asynchronous I/O. Choose Ratpack for maximum throughput and simplicity; Spring Boot for rapid development with extensive integrations.

Question 3

Does Ratpack support WebSockets?

Accepted Answer

Yes, Ratpack has built-in support for WebSockets through its handler API, allowing real-time communication. The documentation includes examples for setting up WebSocket endpoints and managing connections asynchronously.

Question 4

How to integrate Ratpack with a database like PostgreSQL?

Accepted Answer

Ratpack doesn't include a built-in ORM; you can use libraries like Hibernate or JDBC directly. The optional Guice integration helps manage database connections, and community plugins exist for common databases, but setup requires more manual configuration.

Question 5

Is Ratpack good for building full-stack web apps with front-end frameworks?

Accepted Answer

Ratpack is primarily backend-focused and excels at APIs; for full-stack apps, you'll need to integrate front-end tools separately. It can serve static assets, but lacks built-in support for modern front-end frameworks like React or Vue, requiring additional setup.

Question 6

How to handle authentication in Ratpack?

Accepted Answer

Ratpack provides basic utilities for authentication but no comprehensive security module out-of-the-box. You'll need to implement handlers using libraries like Pac4j or custom logic, which can be more complex compared to frameworks with integrated security.

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