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;; | |
;; Associa um valor `value` a um chave `key` no | |
;; primeiro argumento da funcao `f`. | |
;; | |
;; Espera-se que `f` seja um handler que possa | |
;; ser usado com o Ring. | |
;; | |
(defn wrap-assoc [f key value] | |
(fn [request] (f (assoc request key value)))) | |
(defrecord App [database handler] | |
component/Lifecycle | |
(start [component] | |
(let [database (-> component :database :database)] | |
(assoc component :handler | |
(wrap-assoc handler :database database))))) | |
(defn new-app [handler] | |
(component/using | |
(map->App {:handler handler}) | |
[:database])) | |
(defn list-users-handler [request] | |
{:status 200 | |
:body (clojure.string/join "\n" | |
(-> request | |
:database ;; Aqui nós acessamos a chave `:database` | |
;; que foi associada pelo componente `App`. | |
(mc/find-maps :users)))}) |
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