On 02/07/13 18:30, Brian Kirkbride wrote:
In the past I had used promises that were fulfilled by a
FixedThreadPool. But that's a lot of setup and teardown that distracts
from what you're actually trying to achieve.
no it's not...you define it once you use it forever! :)
(defn pool-map
"A saner, more disciplined version of pmap.
Submits jobs eagerly but polls for results lazily.
Don't use if original ordering of 'coll' matters."
([f coll threads]
(let [exec (Executors/newFixedThreadPool threads)
pool (ExecutorCompletionService. exec)
futures (try (mapv (fn [x] (.submit pool #(f x))) coll)
(finally (.shutdown exec)))]
(repeatedly (count futures) #(.. pool take get))))
([f coll]
(pool-map f coll (+ 2 cpu-no))))
Jim
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