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Merge pull request ReactiveX#323 from mattrjacobs/static-core
Static core
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version=0.10.2 | ||
version=0.11.0-SNAPSHOT |
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58
...e-adaptors/rxjava-clojure/src/examples/clojure/rx/lang/clojure/examples/http_examples.txt
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(ns rx.lang.clojure.examples.http-examples | ||
(:require [rx.lang.clojure.interop :as rx] | ||
[clj-http.client :as http]) | ||
(:import rx.Observable rx.subscriptions.Subscriptions)) | ||
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; NOTE on naming conventions. I'm using camelCase names (against clojure convention) | ||
; in this file as I'm purposefully keeping functions and methods across | ||
; different language implementations in-sync for easy comparison. | ||
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(defn fetchWikipediaArticleAsynchronously [wikipediaArticleNames] | ||
"Fetch a list of Wikipedia articles asynchronously. | ||
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return Observable<String> of HTML" | ||
(Observable/create | ||
(rx/fn [observer] | ||
(let [f (future | ||
(doseq [articleName wikipediaArticleNames] | ||
(-> observer (.onNext (http/get (str "http://en.wikipedia.org/wiki/" articleName))))) | ||
; after sending response to onnext we complete the sequence | ||
(-> observer .onCompleted))] | ||
; a subscription that cancels the future if unsubscribed | ||
(Subscriptions/create (rx/action [] (future-cancel f))))))) | ||
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; To see output | ||
(comment | ||
(-> (fetchWikipediaArticleAsynchronously ["Tiger" "Elephant"]) | ||
(.subscribe (rx/action [v] (println "--- Article ---\n" (subs (:body v) 0 125) "..."))))) | ||
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; -------------------------------------------------- | ||
; Error Handling | ||
; -------------------------------------------------- | ||
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(defn fetchWikipediaArticleAsynchronouslyWithErrorHandling [wikipediaArticleNames] | ||
"Fetch a list of Wikipedia articles asynchronously | ||
with proper error handling. | ||
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return Observable<String> of HTML" | ||
(Observable/create | ||
(rx/fn [observer] | ||
(let [f (future | ||
(try | ||
(doseq [articleName wikipediaArticleNames] | ||
(-> observer (.onNext (http/get (str "http://en.wikipedia.org/wiki/" articleName))))) | ||
;(catch Exception e (prn "exception"))) | ||
(catch Exception e (-> observer (.onError e)))) | ||
; after sending response to onNext we complete the sequence | ||
(-> observer .onCompleted))] | ||
; a subscription that cancels the future if unsubscribed | ||
(Subscriptions/create (rx/action [] (future-cancel f))))))) | ||
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; To see output | ||
(comment | ||
(-> (fetchWikipediaArticleAsynchronouslyWithErrorHandling ["Tiger" "NonExistentTitle" "Elephant"]) | ||
(.subscribe (rx/action [v] (println "--- Article ---\n" (subs (:body v) 0 125) "...")) | ||
(rx/action [e] (println "--- Error ---\n" (.getMessage e)))))) | ||
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