Clojure :: store configuration data in external file

Question

At the beginning of my Clojure program I do a:

(def db-coords
    {:classname "org.postgresql.Driver"
     :subprotocol "postgresql"
     :subname (str "//" host ":" port "/" dbname) ;; host, port and dbname are defd above
     :user      "foo"
     :password  "bar"})

I would like to store these values in an external file (.clj or otherwise) on the classpath and load them from there. Clearly one way to do it would be using java.util.Properties but I suspect there is an idiomatic way in Clojure.

Scott · Accepted Answer · 2013-02-09 22:48:42Z

5

Consider using spit and slurp with read-string.

Clojure has a built-in ability to serialize and deserialize its data structures.

To serialize to a file:

(spit "./coords.txt" db-coords)

To load the file back in as a string and deserialize:

(read-string (slurp "./coords.txt"))

answered Feb 9, 2013 at 22:48

Scott

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narkisr · Accepted Answer · 2013-02-15 20:23:22Z

1

clj-config is a nice library which encapsulates the spit, read-string api

https://github.com/Raynes/clj-config

answered Feb 15, 2013 at 20:23

narkisr

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brendanb · Accepted Answer · 2013-12-30 01:05:05Z

0

I have created a library for handling env specific configuration regions via Clojure maps and JVM system properties:

https://github.com/bbbates/confijulate This was a pattern that I found myself repeating over and over for every project.

answered Dec 30, 2013 at 1:05

brendanb

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