; stack dump
(require '[clojure.stacktrace :as stck])

(defn jstack [n]
  (let [threadMXBean (java.lang.management.ManagementFactory/getThreadMXBean)
        info (.getThreadInfo threadMXBean (.getAllThreadIds threadMXBean) 100)]
    (print
      (for [threadInfo info]
        (str
          (newline)
          (.getThreadName threadInfo)
          "\n" (.getThreadState threadInfo)
          "\n"
          (with-out-str
            (let [st (.getStackTrace threadInfo)]
              (newline)
              (print " at ")
              (if-let [e (first st)]
                (stck/print-trace-element e)
                (print "[empty stack trace]"))
              (newline)
              (doseq [e (if (nil? n)
                          (rest st)
                          (take (dec n) (rest st)))]
                (print "    ")
                (stck/print-trace-element e)
                (newline)))))))))

 ;datomic
(d/q '[:find ?x
       :where
       [?x ]
       ]
       db)

; create test datomic
(def conn (do
            (def url "datomic:mem://test")
            (d/delete-database url)
            (d/create-database url)
            (d/connect url)))

; show the month
(require '[joda-time :as j])
(defn mth
  ([] (apply mth (-> (j/date-time)
                   j/as-map
                   ((juxt :year :monthOfYear)))))
  ([m] (mth (-> (j/date-time)
              j/as-map
               :year ) m))
  ([y m]
   (let [today (j/local-date)
         start (j/date-time y m)
         period (j/interval {:start start :period (j/months 1)})
         days (->> start
                (iterate #(j/plus % (j/days 1)))
                (take-while #(j/contains? period %)))
         week-count (atom 1)]
     (->>
       (map #(vector
              %
              (if (j/monday? %)
                (swap! week-count inc)
                @week-count)) days)
       (group-by second)
       vals
       (map (fn [x] (into {} (map (juxt
                                    #(.getAsText (j/property % :dayOfWeek))
                                    #(let [dm (.get (j/property % :dayOfMonth))]
                                      (if (= today (j/local-date %))
                                        (format "*%d*" dm)
                                        dm))) (map first x)))))
       ;(p/map-vals count)
       (clojure.pprint/print-table [ "Monday" "Tuesday" "Wednesday" "Thursday" "Friday" "Saturday" "Sunday"])))))
(mth $go$)

; what's going on
(.getName (java.lang.management.ManagementFactory/getRuntimeMXBean))
(-> (java.lang.management.ManagementFactory/getMemoryMXBean)
  .getHeapMemoryUsage
  .getUsed
  (/ 1000 1000)
  long)