I've been working on a simple Clojure library for bounded caching and
memoization. It's not quite ready for prime-time, but the simple case
that you need is usable.
I'll throw it up on github when I get home tonight and post the URL
here.
On Dec 30, 1:35 pm, Miki <miki.teb...@gmail.com> wrote:
> Hello,
>
> I'm wring a service that polls RSS feeds (using feedme). And I'd like to act
> only on the new entries in each feed.
> So far I have something like:
>
> (defn get-new-entries [seen]
> (let [seen? (complement seen)]
> (filter #(seen? (:id %)) (get-entries))))
>
> (defn poll [sleep-time]
> (loop [seen #{}]
> (let [entries (get-new-entries seen)]
> (doall (map process-entry entries))
> (println "================================")
> (Thread/sleep sleep-time)
> (recur (union seen (set (map :id entries)))))))
>
> (Full demo code athttps://gist.github.com/760094)
>
> The problem is that "seen" will grow without bounds.
> Is there a built in way to have some sort of LRU cache or should I use
> external libraries (like plru)?
>
> Thanks,
> --
> Miki
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