adds multiple entries to the journal

adds an entry to the journal

(-> (journal {:meta {:head {:range 0 3}}}) (add-entry {:start 1 :output {:value 1}}) journal-info) => (contains-in {:id string? :order :desc, :count 1, :duration “0ms”, :template :output.value :start, :head {:start 1, :output.value 1, :s/time string?}})

creates a template for entry

derives the journal given a select statement

(derive -jnl- {:range :1m :15m :sample 2000 :transform {:interval :0.1s :time {:aggregate :first} :default {:aggregate :mean :sample 3}}})

creates a new journal

(journal {:meta {:time {:unit :s :format “HH:mm:ss”} :entry {:flatten false} :head {:range 0 3}}})

merges two journals of the same type together ^:hiddene

(-> ((merge (derive -jnl- {:range :1m :3m :transform {:interval 1 :time {:aggregate :middle} :default {:aggregate :mean :sample 3}}}) (derive -jnl- {:range :10m -1 :transform {:interval :5s :time {:aggregate :first} :default {:aggregate :mean}}})) {:sample :0.1s :transform {:interval :1s :time {:aggregate :first :fn #(long (/ % 100))} :custom [{:keys :output.value :aggregate :random :fn #(long (* % 100))}]} :series [{:data ’(:start :output.value) :s/meta {:title “Output 1” :with :lines}}]}))

processes time series

selects data ferom the journal

(def -jnl- (->> [0 (journal {:meta {:time {:key :start :order :desc} :head {:range 0 3} :hide #{:meta :template :id}}})] (iterate (fn t journal (let t (+ t 1000000000 (rand-int 100000000)) t (add-entry journal {:start t :output {:value (Math/sin (+ (/ t 100000000000) (rand)))}})))) (map second) (take 1000) (last)))

(select -jnl- {:range :1m :5m :sample 10}) => (fn entries (= 10 (count entries)))

(first (select -jnl- {:range :1m :5m :sample 10})) => (contains {:start integer? :output.value number?})

updates journal meta. used for display