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|
(.require
[library
[lux (.except)
[abstract
[monad (.only do)]]
[control
[io (.only IO)]
["[0]" try (.only Try)]
[concurrency
["[0]" async (.only Async)]
["[0]" stm]]]
[data
[binary (.only Binary)]]
[world
[net
[uri (.only URI)]]]]])
(type: .public (Repository !)
(Interface
(is Text
description)
(is (-> URI (! (Try Binary)))
download)
(is (-> URI Binary (! (Try Any)))
upload)))
(def .public (async repository)
(-> (Repository IO) (Repository Async))
(implementation
(def description
(at repository description))
(def (download uri)
(async.future (at repository download uri)))
(def (upload uri content)
(async.future (at repository upload uri content)))
))
(type: .public (Mock s)
(Interface
(is Text
the_description)
(is (-> URI s (Try [s Binary]))
on_download)
(is (-> URI Binary s (Try s))
on_upload)))
(def .public (mock mock init)
(All (_ s) (-> (Mock s) s (Repository Async)))
(let [state (stm.var init)]
(implementation
(def description
(at mock the_description))
(def (download uri)
(stm.commit!
(do [! stm.monad]
[|state| (stm.read state)]
(case (at mock on_download uri |state|)
{try.#Success [|state| output]}
(do !
[_ (stm.write |state| state)]
(in {try.#Success output}))
{try.#Failure error}
(in {try.#Failure error})))))
(def (upload uri content)
(stm.commit!
(do [! stm.monad]
[|state| (stm.read state)]
(case (at mock on_upload uri content |state|)
{try.#Success |state|}
(do !
[_ (stm.write |state| state)]
(in {try.#Success []}))
{try.#Failure error}
(in {try.#Failure error})))))
)))
|
