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middleware.clj
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middleware.clj
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(ns jackdaw.test.middleware
"A test machine executor can be built by composing execution wrappers
defined in here")
(set! *warn-on-reflection* true)
(defn with-status
[f]
(fn [machine cmd]
(let [result (f machine cmd)]
(assoc result
:status (if (contains? (:result result) :error)
:error
:ok)))))
(defn with-timing
"Timing middleware. Adds timing information to the response map"
[f]
(fn [machine cmd]
(let [start (System/nanoTime)
result (f machine cmd)
end (System/nanoTime)
millis (fn [t]
(/ (double t) 1000000.0))]
(assoc result
:started-at (millis start)
:finished-at (millis end)
:duration (- (millis end) (millis start))))))
(defn with-journal-snapshots
"Journal middleware. Adds journal snapshots before/after the operation
to the response map"
[f]
(fn [machine cmd]
(let [journal (:journal machine)
before @journal
result (f machine cmd)
after @journal]
(assoc result
:journal-before before
:journal-after after))))