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konserve.cljc
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konserve.cljc
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(ns hitchhiker.konserve
(:refer-clojure :exclude [resolve subvec])
(:require [clojure.core.rrb-vector :refer [catvec subvec]]
#?(:clj [clojure.core.async :refer [chan promise-chan put!] :as async]
:cljs [cljs.core.async :refer [chan promise-chan put!] :as async])
[konserve.cache :as k]
#?(:clj [clojure.core.cache :as cache]
:cljs [cljs.cache :as cache])
[konserve.memory :refer [new-mem-store]]
[hasch.core :refer [uuid]]
[clojure.set :as set]
#?(:clj [hitchhiker.tree.core :refer [go-try <? <??] :as core]
:cljs [hitchhiker.tree.core :as core])
[hitchhiker.tree.messaging :as msg]
[hitchhiker.tree.async :refer [*async-backend*]])
#?(:cljs (:require-macros [hitchhiker.tree.core :refer [go-try <?]])))
(defn synthesize-storage-addr
"Given a key, returns a promise containing that key for use as a storage-addr"
[key]
(doto (promise-chan)
(put! key)))
(defrecord KonserveAddr [store last-key konserve-key storage-addr]
core/IResolve
(dirty? [_] false)
(last-key [_] last-key)
(resolve [_]
;; inline konserve cache resolution
(let [cache (:cache store)]
(if-let [v (cache/lookup @cache konserve-key)]
(go-try
#_(prn "hitting cache" konserve-key)
(swap! cache cache/hit konserve-key)
(assoc v :storage-addr (synthesize-storage-addr konserve-key)))
(go-try
#_(prn "missing cache")
(let [ch (k/get-in store [konserve-key])]
(-> (case *async-backend*
:none (async/<!! ch)
:core.async (<? ch))
(assoc :storage-addr (synthesize-storage-addr konserve-key)))))))))
(defrecord KonserveBackend [store]
core/IBackend
(new-session [_] (atom {:writes 0
:deletes 0}))
(anchor-root [_ {:keys [konserve-key] :as node}]
node)
(write-node [_ node session]
(go-try
(swap! session update-in [:writes] inc)
(let [pnode (if (core/index-node? node)
(-> (assoc node :storage-addr nil)
(update :children (fn [cs] (mapv #(assoc % :store nil
:storage-addr nil) cs))))
(assoc node :storage-addr nil))]
(let [id (uuid pnode)
ch (k/assoc-in store [id] node)]
(case *async-backend*
:none (async/<!! ch)
:core.async (<? ch))
(->KonserveAddr store (core/last-key node) id (synthesize-storage-addr id))))))
(delete-addr [_ addr session]
(swap! session update :deletes inc)))
(defn get-root-key
[tree]
;; TODO find out why this is inconsistent
(or
(-> tree :storage-addr (async/poll!) :konserve-key)
(-> tree :storage-addr (async/poll!))))
(defn create-tree-from-root-key
[store root-key]
(go-try
(let [val (let [ch (k/get-in store [root-key])]
(case *async-backend*
:none (async/<!! ch)
:core.async (<? ch)))
last-key (core/last-key (assoc val :storage-addr (synthesize-storage-addr root-key)))] ; need last key to bootstrap
(<? (core/resolve
(->KonserveAddr store last-key root-key (synthesize-storage-addr root-key)))))))
(defn add-hitchhiker-tree-handlers [store]
(swap! (:read-handlers store) merge
{'hitchhiker.konserve.KonserveAddr
#(-> % map->KonserveAddr
(assoc :store store
:storage-addr (synthesize-storage-addr (:konserve-key %))))
'hitchhiker.tree.core.DataNode
(fn [{:keys [children cfg]}]
(core/->DataNode (into (sorted-map-by
compare) children)
(promise-chan)
cfg))
'hitchhiker.tree.core.IndexNode
(fn [{:keys [children cfg op-buf]}]
(core/->IndexNode (->> children
vec)
(promise-chan)
(vec op-buf)
cfg))
'hitchhiker.tree.messaging.InsertOp
msg/map->InsertOp
'hitchhiker.tree.messaging.DeleteOp
msg/map->DeleteOp
'hitchhiker.tree.core.Config
core/map->Config})
(swap! (:write-handlers store) merge
{'hitchhiker.konserve.KonserveAddr
(fn [addr]
(assoc addr
:store nil
:storage-addr nil))
'hitchhiker.tree.core.DataNode
(fn [node]
(assoc node :storage-addr nil))
'hitchhiker.tree.core.IndexNode
(fn [node]
(-> node
(assoc :storage-addr nil)
(update-in [:children]
(fn [cs] (map #(assoc % :store nil :storage-addr nil) cs)))))})
store)
(comment
(def store (add-read-handlers (<!! (new-fs-store "/tmp/async-hitchhiker-repl"
:config {:fsync true}))))
(go-try (def store (add-read-handlers (<? (new-mem-store)))))
(def my-tree (<!! (core/flush-tree
(time (reduce (fn [t i]
; ^{:break/when (> i 49)}
(<!! (msg/insert t i i)))
(<!! (core/b-tree (core/->Config 17 300 (- 300 17))))
(range 20000)))
(->KonserveBackend store)
)))
(enable-console-print!)
(go-try (def foo (<? (msg/insert (<? (core/b-tree (core/->Config 17 300 (- 300 17))))
1 1))))
(go-try (def foos (<? (msg/insert (<? (msg/insert (<? (core/b-tree (core/->Config 17 300 (- 300 17))))
1 1))
2 2))))
(go-try (def bar (<? (msg/delete foos 2))))
(go-try
(prn "foo"
(loop [i 0
t (<? (core/b-tree (core/->Config 17 300 (- 300 17))))]
(if (= i 2)
t
(recur (inc i) (<? (msg/insert t i i)))))))
(time (reduce (fn [t i]
(<!! (msg/insert t i i)))
(<!! (core/b-tree (core/->Config 17 300 (- 300 17))))
(range 20000)))
(def my-tree-updated (<!! (core/flush-tree
(<!! (msg/delete (<!! (create-tree-from-root-key store (get-root-key (:tree my-tree)))) 10))
(->KonserveBackend store)
)))
(time (<!! (msg/lookup (<!! (create-tree-from-root-key store (get-root-key (:tree my-tree-updated)))) 100)))
(reduce (fn [t i]
(let [st (System/currentTimeMillis)
tree (:tree (<!! (core/flush-tree (<!! (msg/insert t i i))
(->KonserveBackend store))))]
(when (= (mod i 100) 0)
(let [delta (- (System/currentTimeMillis)
st)]
(println "Op for" i " took " delta " ms")))
tree))
(<!! (core/b-tree (core/->Config 17 300 (- 300 17))))
(range 20000))
(msg/lookup-fwd-iter (<!! (create-tree-from-root-key store (get-root-key (:tree my-tree))))
19899)
)