Interactive Development

If you want to reload your source files without needing to restart your adapter, you need to:

• Run your adapter in a background thread so it doesn't block your REPL.
• Pass your handler function to the adapter as a var, so it will be updated when you reload the namespace.

For example:

(future (run-jetty (var my-handler) {:port 8080}))

Lein-Ring

You can also use Lein-Ring. It's a Leiningen plugin for automating common Ring tasks. It provides a command to start a development web server that automatically reloads modified source files. Add it as a dependency to your project.clj:

:dev-dependencies [[lein-ring "0.3.0"]]

You also need to add a new ring key, which specifies your Ring handler function, like this:

:ring {:handler hello-world.core/handler}))

Here's an updated project.clj for the Getting started tutorial:

(defproject hello-world "1.0.0-SNAPSHOT"
  :description "FIXME: write"
  :dependencies [[org.clojure/clojure "1.2.0"]
                 [org.clojure/clojure-contrib "1.2.0"]
                 [ring/ring-core "0.3.4"]
                 [ring/ring-jetty-adapter "0.3.4"]]
  :dev-dependencies [[lein-ring "0.3.0"]]
  :ring {:handler hello-world.core/handler}))

Now run the command lein ring server to start the web server. For more information, see Lein-Ring's README.