Best way to manage a pool of resources in Clojure -


i have a web service endpoint uses mutable resource java library. web service endpoint can receive multiple queries @ same time. (the endpoint implemented using ring/compojure). creating these resources costly, re-creating them every web service call inefficient.

what want create pool of resource populate when web service starts. each time endpoint called, takes resource pool, use processing, , push pool , wait next call happen.

i wondering best way in clojure? there "pool" clojure library me that?

i naively tried implement using vector in atom each item of vector resource. however, learned not work way.

this based on timothy pratley's idea of using refs:

(def pool (ref ['a 'b 'c]))  (defn take' [pool]   (dosync     (let [[h & t] @pool]       (ref-set pool (vec t))       h)))  (defn put [pool x]   (dosync     (alter pool conj x)     nil))  (take' pool)   ;; => 'a (put pool 'a)  ;; => nil (take' pool)   ;; => 'a (take' pool)   ;; => 'b (take' pool)   ;; => 'c

maybe not best way attack this. simplicity of it.


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