Question 1

How to set up a basic Ring server with Jetty?

Accepted Answer

Add the ring-jetty-adapter dependency to your project, then define a Ring handler function and use the run-jetty function from the adapter to start the server. Refer to the Wiki for detailed examples on handler composition and configuration.

Question 2

Ring vs Compojure for Clojure web development?

Accepted Answer

Ring is a low-level HTTP abstraction library, while Compojure is a routing library built on top of Ring. Use Ring for foundational control and modularity; choose Compojure for easier routing if you don't need to build everything from scratch.

Question 3

What middleware is available for Ring?

Accepted Answer

Ring-core includes core middleware for sessions, cookies, and params, but the ecosystem has community libraries for additional features. Check the Wiki and Clojars for packages like ring-json or ring-defaults to extend functionality.

Question 4

How to handle sessions in Ring applications?

Accepted Answer

Use the ring.middleware.session/session middleware from ring-core to manage session state. It stores data in a cookie or server-side store, and you can customize it with options for encryption and expiration.

Question 5

Can Ring be used with ClojureScript?

Accepted Answer

Ring is primarily for server-side Clojure (JVM), so it doesn't directly support ClojureScript. However, you can build APIs with Ring for ClojureScript frontends, often using libraries like re-frame or HTTP clients for communication.

Question 6

What are the performance implications of using Ring middleware?

Accepted Answer

Middleware adds overhead due to function composition, but Ring's design minimizes this with efficient protocols. For high-performance needs, optimize middleware order and consider using adapters like Jetty for better throughput.

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