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My Clojure Setup

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My Clojure Setup

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What every Java engineer should know about microservices: Reactive Microservices Architecture.  Brought to you in partnership with Lightbend.

So... I've got my Clojure setup down

I've got my Clojure setup pretty much nailed.

I am using an old ThinkPad X300 running Linux Mint. Why? Well, I'm waiting for the new Haswell processors from Intel, I donated my MacBook Air to charity (I still have a MacBook Pro), I need something light for carrying around, 13" machines are much easier to code on airplanes, and I had the X300 laying around.

The X300 has a 4GB RAM limit and a slow processor (my desktop Linux box is 3 times faster.) So, I needed a dev environment that's CPU friendly and RAM friendly. While I really like IntelliJ, it's a CPU and RAM hog. IntelliJ is better for statically typed languages... but with Clojure, function completion, etc. are less valuable. So, my editor choice is Sublime Text.

My Setup

I downloaded and purchased Sublime.

I followed the instructions for installing SublimeREPL.

Then I installed a helpful indentation package.

Finally, I updated my key bindings to make them more Emacs-like:

{ "keys": ["ctrl+shift+-"], "command": "undo" },
{ "keys": ["ctrl+d"], "command": "right_delete" },
{ "keys": ["ctrl+a"], "command": "move_to", "args": {"to": "bol", "extend": false} },
{ "keys": ["ctrl+e"], "command": "move_to", "args": {"to": "eol", "extend": false} }

And my user preferences have auto-save enabled:

"color_scheme": "Packages/Color Scheme - Default/Monokai.tmTheme",
"save_on_focus_lost": true


My workflow is to open the Clojure REPL in Sublime. I write some code in a .clj file, do a ctrl-TAB to switch to the REPL and do an up-arrow to something like:

(do (use 'plugh.core :reload-all) (thingy))

That reloads the current package and all its dependencies (which takes almost no time, even on my slow machine) then invokes a function. I just keep editing, executing, and building my code.

When I want to test, I change my namespace to a test namespace:

(ns plugh.file-test)
(use 'clojure.test)

And then I can repeatedly run tests:

(do (use 'plugh.file-test :reload-all) (run-tests))

Why Sublime vs. Emacs

I'm an Emacs lover... but Sublime has a simple feature that is awesome: ctrl-p.

Basically, you can type ctrl-p and then get a smart list of files in the project and search by file name (and likely other thing). This makes project navigation so much easier. Sublime has a nice package mechanism (yeah, Emacs 24 does, too.) All in all, Sublime seems to work more like I do without much modification vs. Emacs which can do everything if I spend weeks getting the packages, etc. just right.

Microservices for Java, explained. Revitalize your legacy systems (and your career) with Reactive Microservices Architecture, a free O'Reilly book. Brought to you in partnership with Lightbend.


Published at DZone with permission of David Pollak. See the original article here.

Opinions expressed by DZone contributors are their own.


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