Once you've AOT compiled that (which is necessary for the class to be
actually generated), slurp won't be called again. Beware, however, that
`def` (and hence `slurp`) will be executed by the compiler, at compile
time, in the context (classpath, cwd, etc.) of the compiler, which may not
be what you want.
Note that you can easily test that by replacing your def with:
(def parser
(do (println "def parser executed")
(slurp ".....)))
If you want the parser to be slurped once per execution, you can use an
atom and a function, something like:
(let [p (atom nil)]
(defn parser
[]
(swap! p (fn [p] (if (nil? p) (slurp "....") p)))))
You can then access your parser with (parser), which will only slurp the
file once. (If it matters, there are alternatives that will not keep on
paying the atom update cost.)
On 14 August 2015 at 10:59, Thomas Goossens <cont...@thomasgoossens.be>
wrote:
> When a java class uses the compiled Test (gen-class) from test namespace.
> Everytime the static function -run is called, will parser be slurped again
> or only once ?
>
> (ns test (:gen-class :name Test :methods [ ^:static [run
> [] String])) (def parser (slurp "......"))
>
> (defn -run [] ;... do something with parser )
>
>
>
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