/
trace.cljc
218 lines (185 loc) · 10.1 KB
/
trace.cljc
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(ns com.wsscode.pathom.trace
#?(:cljs (:require-macros [com.wsscode.pathom.trace]))
(:require [clojure.spec.alpha :as s]
[#?(:clj com.wsscode.common.async-clj
:cljs com.wsscode.common.async-cljs)
:refer [let-chan]]
[clojure.walk :as walk]))
(defn now []
#?(:clj (System/currentTimeMillis)
:cljs (inst-ms (js/Date.))))
(defn trace [env event]
(if-let [event-trace (get env ::trace*)]
(swap! event-trace conj
(assoc event
:com.wsscode.pathom.core/path (:com.wsscode.pathom.core/path env [])
::timestamp (now)))))
(s/fdef trace
:args (s/cat :env map? :event (s/keys :opt [::event])))
(defn trace-enter
([env event]
(let [id (gensym "pathom-trace-")]
(trace env (assoc event ::direction ::enter ::id id))
id))
([env event trace-id]
(trace env (assoc event ::direction ::enter ::id trace-id))
trace-id))
(defn trace-leave
([env trace-id]
(trace env {::direction ::leave ::id trace-id}))
([env trace-id event]
(trace env (assoc event ::direction ::leave ::id trace-id))
trace-id))
(defmacro tracing [env event & body]
`(if (get ~env ::trace*)
(let [trace-id# (trace-enter ~env ~event)
res# (do ~@body)]
(trace-leave ~env trace-id# ~event)
res#)
(do ~@body)))
(defn live-trace! [trace-atom]
(add-watch trace-atom :live
(fn [_ _ _ n]
(let [evt (peek n)]
(print (str (pr-str [(::event evt) (dissoc evt ::event)]) "\n"))))))
(defn compute-durations [trace]
(let [leave-items (into {} (comp (filter (comp #(= ::leave %) ::direction))
(map (juxt ::id identity)))
trace)
initial-time (::timestamp (first trace))]
(into []
(comp (remove (fn [e] e (= ::leave (::direction e))))
(map (fn [{::keys [id timestamp] :as e}]
(let [e (assoc e ::relative-timestamp (- timestamp initial-time))]
(if-let [{et ::timestamp :as leave} (get leave-items id)]
(-> e
(assoc
::timestamp-leave et
::duration (- et timestamp))
(merge (dissoc leave ::timestamp))
(dissoc ::id ::direction))
e)))))
trace)))
(defmulti trace-tree-collect (fn [_x row] (::event row)))
(defmethod trace-tree-collect :default [x _] x)
(defn tree-assoc-detail [row x keys]
(update-in x [:response ::details] (fnil conj [])
(select-keys row (into [::event ::label ::relative-timestamp ::duration ::style] keys))))
(defn trace-style [row style]
(assoc row ::style style))
(defn tree-assoc-key-detail [{:keys [key] :as row} x keys]
(update-in x [:response ::children key ::details] (fnil conj [])
(select-keys row (into [::event ::label ::relative-timestamp ::duration ::style] keys))))
(defn trace->tree* [paths path]
(-> (reduce
(fn [x {::keys [event relative-timestamp]
:keys [key]
:as row}]
(case event
(:com.wsscode.pathom.parser/parse-loop :com.wsscode.pathom.core/trace-plugin)
(update x :response #(merge (select-keys row [::relative-timestamp ::duration :com.wsscode.pathom.core/path]) %))
:com.wsscode.pathom.parser/process-key
(let [next-path (conj path key)]
(if (contains? (:visited x) next-path)
x
(-> x
(assoc-in [:response :com.wsscode.pathom.core/path] path)
(assoc-in [:response ::children key]
(-> (merge (trace->tree* paths next-path) (select-keys row [::relative-timestamp :key]))
(assoc :com.wsscode.pathom.core/path next-path)))
(update :visited conj next-path))))
:com.wsscode.pathom.core/join-seq
(let [count (:com.wsscode.pathom.core/seq-count row)]
(reduce
(fn [x i]
(let [next-path (conj path i)]
(assoc-in x [:response ::children i]
(-> (merge (trace->tree* paths next-path) (select-keys row [::relative-timestamp :key]) {:key i})
(assoc :com.wsscode.pathom.core/path next-path)))))
x
(range count)))
(:com.wsscode.pathom.parser/async-return :com.wsscode.pathom.parser/skip-wait-key :com.wsscode.pathom.parser/call-read
:com.wsscode.pathom.parser/skip-resolved-key :com.wsscode.pathom.parser/external-wait-key)
(update-in x [:response ::children key ::details] (fnil conj []) (select-keys row [::event ::label ::style ::relative-timestamp :key]))
:com.wsscode.pathom.parser/max-iterations-reached
(update-in x [:response ::children key ::details] (fnil conj []) (select-keys row [::event ::label ::style ::relative-timestamp :com.wsscode.pathom.parser/max-key-iterations]))
(:com.wsscode.pathom.parser/process-pending :com.wsscode.pathom.parser/reset-loop
:com.wsscode.pathom.parser/flush-watchers-loop ::trace-done)
(update-in x [:response ::details] (fnil conj []) (select-keys row [::event ::label ::style ::relative-timestamp :com.wsscode.pathom.parser/provides :com.wsscode.pathom.parser/merge-result?
:com.wsscode.pathom.parser/loop-keys]))
:com.wsscode.pathom.parser/merge-result
(reduce
(fn [x key]
(update-in x [:response ::children key ::details] (fnil conj []) (select-keys row [::event ::label ::style ::relative-timestamp])))
x
(keys (:com.wsscode.pathom.parser/response-value row)))
(:com.wsscode.pathom.connect/compute-plan :com.wsscode.pathom.connect/waiting-resolver :com.wsscode.pathom.connect/schedule-resolver
:com.wsscode.pathom.connect/call-resolver-with-cache :com.wsscode.pathom.connect/call-resolver :com.wsscode.pathom.core/parallel-sequence-loop
:com.wsscode.pathom.connect/call-resolver-batch :com.wsscode.pathom.connect/batch-items-ready :com.wsscode.pathom.connect/batch-result-error :com.wsscode.pathom.connect/batch-result-ready
:com.wsscode.pathom.connect/merge-resolver-response :com.wsscode.pathom.connect/resolver-error :com.wsscode.pathom.connect/invalid-resolve-response)
(update-in x [:response ::details] (fnil conj [])
(select-keys row [::event ::label ::style ::relative-timestamp ::duration :com.wsscode.pathom.connect/waiting-key :com.wsscode.pathom.connect/input-data
:com.wsscode.pathom.parser/provides :com.wsscode.pathom.connect/sym :com.wsscode.pathom.core/error :com.wsscode.pathom.connect/items-count :com.wsscode.pathom.connect/plan :key]))
:com.wsscode.pathom.parser/value-return
(-> x
(update-in [:response ::children key ::details] (fnil conj []) (select-keys row [::event ::label ::style ::relative-timestamp]))
(update-in [:response ::children key] assoc ::duration (- relative-timestamp (get-in x [:response ::children key ::relative-timestamp]))))
(trace-tree-collect x row)))
{:visited #{}
:response {}}
(get paths path))
:response))
(defn trace->tree [trace]
(let [paths (->> trace compute-durations (group-by :com.wsscode.pathom.core/path))]
(trace->tree* paths [])))
(defn compute-details-duration [x]
(let [res (update x ::details #(vec (sort-by ::relative-timestamp %)))
last-detail (peek (::details res))
last-ts (+ (::duration last-detail 0) (::relative-timestamp last-detail 0))]
(update res ::duration #(max (or % 0) (- last-ts (::relative-timestamp res 0))))))
(defn normalize-tree-details [trace-tree]
(walk/postwalk
(fn [x]
(cond-> x
(and (map? x) (contains? x ::details))
(compute-details-duration)))
trace-tree))
(defn compute-d3-tree [{::keys [relative-timestamp duration children details]
:com.wsscode.pathom.core/keys [path]
:keys [key]}]
(cond-> {:start relative-timestamp
:path path
:duration (or duration 0)
:details (mapv (fn [{::keys [relative-timestamp duration event]
:as row}]
(let [details (->> (dissoc row ::relative-timestamp ::timestamp ::duration ::event)
(into {} (map (fn [[k v]] [(keyword (name k)) v]))))]
(merge {:event (name event)
:duration (or duration 0)
:start relative-timestamp}
details)))
details)}
key (assoc :name (str key))
children (assoc :children
(into [] (map (comp compute-d3-tree second) children)))))
(defn trace->viz [trace]
(-> trace trace->tree normalize-tree-details compute-d3-tree
(assoc :hint "Query")))
(defn wrap-parser-trace [parser]
(fn wrap-parser-trace-internal [env tx]
(if (some #{:com.wsscode.pathom/trace} tx)
(let [trace* (or (::trace* env) (atom []))
env' (assoc env ::trace* trace*)
parser-trace (trace-enter env' {::event ::trace-plugin})]
(let-chan [res (parser env' tx)]
(trace-leave env' parser-trace {::event ::trace-plugin})
(trace env' {::event ::trace-done})
(assoc res :com.wsscode.pathom/trace (trace->viz @trace*))))
(parser env tx))))
(def trace-plugin
{:com.wsscode.pathom.core/wrap-parser
wrap-parser-trace
:com.wsscode.pathom.connect/register
[{:com.wsscode.pathom.connect/sym `trace
:com.wsscode.pathom.connect/output [:com.wsscode.pathom/trace]
:com.wsscode.pathom.connect/resolve (fn [env _] {:com.wsscode.pathom/trace nil})}]})