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filestore.clj
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(ns konserve.filestore
(:require
[clojure.core.async :refer [go <!! chan close! put!]]
[clojure.java.io :as io]
[clojure.string :refer [includes? ends-with?]]
[konserve.compressor :refer [null-compressor]]
[konserve.encryptor :refer [null-encryptor]]
[konserve.impl.defaults :refer [update-blob connect-default-store key->store-key store-key->uuid-key]]
[konserve.impl.storage-layout :refer [PBackingStore
-keys
PBackingBlob -close -get-lock -sync
-read-header -read-meta -read-value -read-binary
-write-header -write-meta -write-value -write-binary
PBackingLock -release header-size]]
[konserve.nio-helpers :refer [blob->channel]]
[konserve.protocols :refer [-deserialize]]
[konserve.utils :refer [async+sync *default-sync-translation*]]
[superv.async :refer [go-try- <?-]]
[taoensso.timbre :refer [info trace]])
(:import
[java.io ByteArrayInputStream FileInputStream Closeable]
[java.nio.channels FileChannel AsynchronousFileChannel CompletionHandler FileLock]
[java.nio ByteBuffer]
[java.nio.file Files StandardCopyOption FileSystems Path Paths OpenOption LinkOption StandardOpenOption]
(java.util Date UUID)))
(def ^:dynamic *sync-translation*
(merge *default-sync-translation*
'{AsynchronousFileChannel FileChannel}))
(defn- sync-base
"Helper Function to synchronize the base of the filestore"
[base]
(let [p (.getPath (FileSystems/getDefault) base (into-array String []))
fc (FileChannel/open p (into-array OpenOption []))]
(.force fc true)
(.close fc)))
(defn- check-and-create-backing-store
"Helper Function to Check if Base is not writable"
[base]
(let [f (io/file base)
test-file (io/file (str base "/" (UUID/randomUUID)))]
(when-not (.exists f)
(.mkdir f))
(when-not (.createNewFile test-file)
(throw (ex-info "Cannot write to base." {:type :not-writable
:base base})))
(.delete test-file)))
(defn delete-store
"Permanently deletes the base of the store with all files."
[base]
(let [f (io/file base)
parent-base (.getParent f)]
(doseq [c (.list (io/file base))]
(.delete (io/file (str base "/" c))))
(.delete f)
(try
(sync-base parent-base)
(catch Exception e
e))))
(defn list-files
"Lists all files on the first level of a directory."
([directory]
(list-files directory (fn [_] false)))
([directory ephemeral?]
(let [root (Paths/get directory (into-array String []))
ds (Files/newDirectoryStream root)
files (mapv (fn [^Path path] (str (.relativize root path)))
(remove ephemeral? ds))]
(.close ds)
files)))
(defn count-konserve-keys [dir]
"Counts konserve files in the directory."
(reduce (fn [c path] (if (.endsWith ^String path ".ksv") (inc c) c))
0
(list-files dir)))
(defn store-exists?
"Checks if path exists."
[base]
(let [f (io/file base)]
(if (.exists f)
(do (info "Store directory at " (str base) " exists with " (count-konserve-keys base) " konserve keys.")
true)
(do (info "Store directory at " (str base) " does not exist.")
false))))
(declare migrate-old-files migrate-file-v2 migrate-file-v1)
(defrecord BackingFilestore [base detected-old-blobs ephemeral?]
PBackingStore
(-create-blob [_this store-key env]
(let [{:keys [sync?]} env
path (Paths/get base (into-array String [store-key]))
standard-open-option (into-array StandardOpenOption
[StandardOpenOption/WRITE
StandardOpenOption/READ
StandardOpenOption/CREATE])
ac (if sync?
(FileChannel/open path standard-open-option)
(AsynchronousFileChannel/open path standard-open-option))]
(if sync? ac (go ac))))
(-delete-blob [_this store-key env]
(async+sync (:sync? env) *default-sync-translation*
(go-try- (Files/delete (Paths/get base (into-array String [store-key]))))))
(-blob-exists? [_this store-key env]
(async+sync (:sync? env) *default-sync-translation*
(go-try- (Files/exists (Paths/get base (into-array String [store-key])) (into-array LinkOption [])))))
(-migratable [_this _key store-key env] ;; or importable
(async+sync (:sync? env) *default-sync-translation*
(go-try- (when detected-old-blobs
(let [uuid-key (store-key->uuid-key store-key)]
(or (@detected-old-blobs (str base "/meta/" uuid-key))
(@detected-old-blobs (str base "/" uuid-key))
(@detected-old-blobs (str base "/B_" uuid-key))))))))
(-migrate [this old-path key-vec serializer read-handlers write-handlers env]
(async+sync (:sync? env) *default-sync-translation*
(go-try- (if detected-old-blobs
(if (clojure.string/includes? old-path "meta")
(<?- (migrate-file-v2 this old-path serializer read-handlers write-handlers env))
(if (or key-vec (includes? old-path "B_"))
(<?- (migrate-file-v1 this old-path key-vec serializer read-handlers write-handlers env))
(do (info "Migration of" old-path "not possible without knowing original key.")
false)))
false))))
(-handle-foreign-key [this file-or-dir serializer read-handlers write-handlers env]
(migrate-old-files this file-or-dir serializer read-handlers write-handlers env))
(-keys [_this env]
(async+sync (:sync? env) *default-sync-translation*
(go-try- (into [] (list-files base ephemeral?)))))
(-copy [_this from to env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
;; TODO throws java.lang.ClassNotFoundException:
;; java.nio.file.Files {}
;; in native-image compilation
#_(Files/copy ^Path from1 ^Path to1
(into-array [StandardCopyOption/REPLACE_EXISTING]))
;; work-around with clojure.java.io for now:
(io/copy (.toFile (Paths/get base (into-array String [from])))
(.toFile (Paths/get base (into-array String [to])))))))
(-atomic-move [_this from to env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(Files/move (Paths/get base (into-array String [from]))
(Paths/get base (into-array String [to]))
(into-array [StandardCopyOption/ATOMIC_MOVE])))))
(-create-store [_this env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(check-and-create-backing-store base))))
(-delete-store [_this env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(delete-store (:base env)))))
(-store-exists? [_this env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(store-exists? (:base env)))))
(-sync-store [_this env]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(sync-base base)))))
(extend-type AsynchronousFileChannel
PBackingBlob
(-sync [this _env] (go-try- (.force this true)))
(-close [this _env] (go-try- (.close this)))
(-get-lock [this _env] (go-try- (.get (.lock this))))
(-write-header [this header env]
(let [{:keys [msg]} env
ch (chan)
buffer (ByteBuffer/wrap header)]
(try
(.write this buffer 0 header-size
(proxy [CompletionHandler] []
(completed [_res _att]
(close! ch))
(failed [t _att]
(put! ch (ex-info "Could not write key file."
(assoc msg :exception t)))
(close! ch))))
(finally
(.clear ^ByteBuffer buffer)))
ch))
(-write-meta [this meta-arr env]
(let [{:keys [msg]} env
ch (chan)
meta-size (alength ^bytes meta-arr)
buffer (ByteBuffer/wrap meta-arr)]
(try
(.write this buffer header-size (+ header-size meta-size)
(proxy [CompletionHandler] []
(completed [_res _att]
(close! ch))
(failed [t _att]
(put! ch (ex-info "Could not write key file."
(assoc msg :exception t)))
(close! ch))))
(finally
(.clear buffer)))
ch))
(-write-value [this value-arr meta-size env]
(let [{:keys [msg]} env
ch (chan)
total-size (.size this)
buffer (ByteBuffer/wrap value-arr)]
(try
(.write this buffer (+ header-size meta-size) total-size
(proxy [CompletionHandler] []
(completed [_res _att]
(close! ch))
(failed [t _att]
(put! ch (ex-info "Could not write key file."
(assoc msg :exception t)))
(close! ch))))
(finally
(.clear buffer)))
ch))
(-write-binary [this meta-size blob env]
(let [{:keys [msg buffer-size]} env
[bis read] (blob->channel blob buffer-size)
buffer (ByteBuffer/allocate buffer-size)
start (+ header-size meta-size)
stop (+ buffer-size start)]
(go-try-
(loop [start-byte start
stop-byte stop]
(let [size (read bis buffer)
_ (.flip buffer)
ch (chan)]
(when-not (= size -1)
(.write this buffer start-byte stop-byte
(proxy [CompletionHandler] []
(completed [_res _att]
(close! ch))
(failed [t _att]
(put! ch (ex-info "Could not write key file."
(assoc msg :exception t)))
(close! ch))))
(<?- ch)
(.clear ^ByteBuffer buffer)
(recur (+ buffer-size start-byte) (+ buffer-size stop-byte)))))
(catch Exception e
(trace "write-binary error: " e)
e)
(finally
(.close ^Closeable bis)
(.clear ^ByteBuffer buffer)))))
(-read-header [this env]
(let [{:keys [msg]} env
ch (chan)
buffer (ByteBuffer/allocate header-size)]
(try
(.read this buffer 0 header-size
(proxy [CompletionHandler] []
(completed [_res _]
(put! ch (.array buffer)))
(failed [t _att]
(put! ch (ex-info "Could not read key."
(assoc msg :exception t))))))
(finally
(.clear buffer)))
ch))
(-read-meta [this meta-size env]
(let [{:keys [msg header-size]} env
ch (chan)
buffer (ByteBuffer/allocate meta-size)]
(try
(.read this buffer header-size (+ header-size meta-size)
(proxy [CompletionHandler] []
(completed [_res _]
(put! ch (.array buffer)))
(failed [t _att]
(put! ch (ex-info "Could not read key."
(assoc msg :exception t))))))
(finally
(.clear buffer)))
ch))
(-read-value [this meta-size env]
(let [{:keys [msg header-size]} env
total-size (.size this)
ch (chan)
buffer (ByteBuffer/allocate (- total-size
meta-size
header-size))]
(try
(.read this buffer (+ header-size meta-size)
(- total-size
meta-size
header-size)
(proxy [CompletionHandler] []
(completed [_res _]
(put! ch (.array buffer)))
(failed [t _att]
(put! ch (ex-info "Could not read key."
(assoc msg :exception t))))))
(finally
(.clear buffer)))
ch))
(-read-binary [this meta-size locked-cb env]
(let [{:keys [msg header-size]} env
total-size (.size this)]
;; TODO use FileInputStream to not load the file in memory
(go-try-
(<?-
(locked-cb {:input-stream (ByteArrayInputStream.
(<?-
(let [ch (chan)
buffer (ByteBuffer/allocate (- total-size
meta-size
header-size))]
(try
(.read this buffer (+ header-size meta-size)
total-size
(proxy [CompletionHandler] []
(completed [_res _]
(put! ch (.array buffer)))
(failed [t _att]
(put! ch (ex-info "Could not read key."
(assoc msg :exception t))))))
(finally
(.clear buffer)))
ch)))
:size total-size}))
(catch Exception e
(trace "read-binary error: " e)
e)))))
(extend-type FileChannel
PBackingBlob
(-sync [this _env] (.force this true))
(-close [this _env] (.close this))
(-get-lock [this _env] (.lock this))
(-write-header [this header _env]
(let [buffer (ByteBuffer/wrap header)]
(try
(.write this buffer 0)
(finally
(.clear buffer)))))
(-write-meta [this meta-arr _env]
(let [buffer (ByteBuffer/wrap meta-arr)]
(try
(.write this buffer header-size)
(finally
(.clear buffer)))))
(-write-value [this value-arr meta-size _env]
(let [buffer (ByteBuffer/wrap value-arr)]
(try
(.write this buffer (+ header-size meta-size))
(finally
(.clear buffer)))))
(-write-binary [this meta-size blob env]
(let [{:keys [buffer-size]} env
[bis read] (blob->channel blob buffer-size)
buffer (ByteBuffer/allocate buffer-size)
start (+ header-size meta-size)
stop (+ buffer-size start)]
(try
(loop [start-byte start
stop-byte stop]
(let [size (read bis buffer)
_ (.flip buffer)]
(when-not (= size -1)
(.write this buffer start-byte)
(.clear buffer)
(recur (+ buffer-size start-byte) (+ buffer-size stop-byte)))))
(finally
(.close ^Closeable bis)
(.clear buffer)))))
(-read-header [this _env]
(let [buffer (ByteBuffer/allocate header-size)]
(try
(.read this buffer 0)
(.array buffer)
(finally
(.clear buffer)))))
(-read-meta [this meta-size env]
(let [{:keys [header-size]} env
buffer (ByteBuffer/allocate meta-size)]
(try
(.read this buffer header-size)
(.array buffer)
(finally
(.clear buffer)))))
(-read-value [this meta-size env]
(let [{:keys [header-size]} env
total-size (.size this)
buffer (ByteBuffer/allocate (- total-size
meta-size
header-size))]
(try
(.read this buffer (+ header-size meta-size))
(.array buffer)
(finally
(.clear buffer)))))
(-read-binary [this meta-size locked-cb env]
(let [{:keys [header-size]} env
total-size (.size this)]
;; TODO use FileInputStream to not load the file in memory
(locked-cb {:input-stream (ByteArrayInputStream.
(let [buffer (ByteBuffer/allocate (- total-size
meta-size
header-size))]
(try
(.read this buffer (+ header-size meta-size))
(.array buffer)
(finally
(.clear buffer)))))
:size total-size}))))
(extend-type FileLock
PBackingLock
(-release [this env]
(if (:sync? env)
(.release this)
(go-try- (.release this)))))
;; ====================== Migration code ======================
(defn- -read [this start-byte stop-byte msg env]
(if (:sync? env)
(let [buffer (ByteBuffer/allocate (- stop-byte start-byte))]
(try
(.read ^FileChannel this buffer start-byte)
(.array buffer)
(finally
(.clear buffer))))
(let [buffer (ByteBuffer/allocate (- stop-byte start-byte))]
(try
(let [res-ch (chan)
handler (proxy [CompletionHandler] []
(completed [_res _]
(put! res-ch (.array buffer)))
(failed [t _att]
(put! res-ch (ex-info "Could not read key."
(assoc msg :exception t)))))]
(.read ^AsynchronousFileChannel this buffer start-byte stop-byte handler)
res-ch)
(finally
(.clear buffer))))))
(defn get-file-channel [path sync?]
(let [standard-open-option (into-array StandardOpenOption [StandardOpenOption/READ])]
(if sync?
(let [channel (FileChannel/open path standard-open-option)]
[channel (.size channel)])
(let [channel (AsynchronousFileChannel/open path standard-open-option)]
[channel (.size channel)]))))
(defn- migrate-file-v1
"Migration function for konserve version with old file-schema."
[{:keys [base detected-old-blobs] :as backing}
old-path key-vec
serializer read-handlers write-handlers
{:keys [version input up-fn compressor encryptor operation locked-cb buffer-size sync?]
:as env}]
(let [key (first key-vec)
store-key (key->store-key key)
data-path (Paths/get old-path (into-array String []))
[c-data-file size-data] (get-file-channel data-path sync?)
binary? (includes? old-path "B_")]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(let [[[nkey] data] (if binary?
[[key] true]
(->>
(<?- (-read c-data-file 0 size-data
{:type :read-data-old-error
:path data-path}
env))
(ByteArrayInputStream.)
(-deserialize serializer read-handlers)))
[meta old] (if binary?
[{:key key :type :binary :last-write (Date.)}
{:operation :write-binary
:input (if input input (FileInputStream. ^String old-path))
:msg {:type :write-binary-error
:key key}}]
[{:key nkey :type :edn :last-write (Date.)}
{:operation :write-edn
:up-fn (if up-fn (up-fn data) (fn [_] data))
:msg {:type :write-edn-error
:key key}}])
env (merge {:version version
:compressor compressor
:encryptor encryptor
:store-key store-key
:buffer-size buffer-size
:base base
:key-vec [nkey]
:up-fn-meta (fn [_] meta)}
old)
return-value (fn [r]
(Files/delete data-path)
(swap! detected-old-blobs disj old-path)
r)]
(if (contains? #{:write-binary :write-edn} operation)
(<?- (update-blob backing store-key serializer write-handlers env [nil nil]))
(let [value (<?- (update-blob backing store-key serializer write-handlers env [nil nil]))]
(if (= operation :read-meta)
(return-value meta)
(if (= operation :read-binary)
(let [start-byte 0
stop-byte size-data
res (<?- (-read c-data-file start-byte stop-byte
{:type :migration-v1-read-binary-error
:key key}
(assoc env
:locked-cb locked-cb
:operation :read-binary)))]
(<?- (locked-cb {:input-stream (ByteArrayInputStream. res)})))
(return-value (second value)))))))
(finally
(when binary?
(Files/delete data-path))
(.close ^AsynchronousFileChannel c-data-file))))))
(defn- migrate-file-v2
"Migration Function For Konserve Version, who has Meta and Data Bases.
Write old file into new Konserve directly."
[{:keys [base detected-old-blobs] :as backing}
old-path
serializer read-handlers write-handlers
{:keys [version input up-fn locked-cb operation compressor encryptor sync? buffer-size] :as env}]
(let [meta-path (Paths/get old-path (into-array String []))
data-store-key (clojure.string/replace old-path #"meta" "data")
data-path (Paths/get data-store-key (into-array String []))
[c-meta-file size-meta] (get-file-channel meta-path sync?)
[c-data-file size-data] (get-file-channel data-path sync?)]
(async+sync (:sync? env) *default-sync-translation*
(go-try-
(let [{:keys [format key]} (->> (<?- (-read c-meta-file 0 size-meta
{:type :read-meta-old-error
:path meta-path}
env))
(ByteArrayInputStream.)
(-deserialize serializer read-handlers))
store-key (key->store-key key)
data (when (= :edn format)
(->> (<?- (-read c-data-file 0 size-data
{:type :read-data-old-error
:path data-path}
env))
(ByteArrayInputStream.)
(-deserialize serializer read-handlers)))
[meta old] (if (= :binary format)
[{:key key :type :binary :last-write (Date.)}
{:operation :write-binary
:input (if input input (FileInputStream. data-store-key))
:msg {:type :write-binary-error
:key key}}]
[{:key key :type :edn :last-write (Date.)}
{:operation :write-edn
:up-fn (if up-fn (up-fn data) (fn [_] data))
:msg {:type :write-edn-error
:key key}}])
env (merge {:version version
:compressor compressor
:encryptor encryptor
:buffer-size buffer-size
:base base
:store-key store-key
:key-vec [key]
:up-fn-meta (fn [_] meta)}
old)
return-value (fn [r]
(Files/delete meta-path)
(Files/delete data-path)
(swap! detected-old-blobs disj old-path) r)]
(if (contains? #{:write-binary :write-edn} operation)
(<?- (update-blob backing store-key serializer write-handlers env [nil nil]))
(let [value (<?- (update-blob backing store-key serializer write-handlers env [nil nil]))]
(if (= operation :read-meta)
(return-value meta)
(if (= operation :read-binary)
(let [start-byte 0
stop-byte size-data
res (<?- (-read c-data-file start-byte stop-byte
{:type :migration-v2-binary-read-error
:key key}
(assoc env
:locked-cb locked-cb
:operation :read-binary)))]
(<?- (locked-cb {:input-stream (ByteArrayInputStream. res)}))
(Files/delete meta-path)
(Files/delete data-path))
(return-value (second value)))))))
(finally
(<?- (-close c-data-file env))
(<?- (-close c-meta-file env)))))))
(defn migrate-old-files [{:keys [base] :as backing} old-store-key serializer read-handlers write-handlers {:keys [sync?] :as env}]
(async+sync
sync? *sync-translation*
(go-try-
(let [env (update-in env [:msg :keys] (fn [_] old-store-key))]
(cond
;; ignore the data base
(includes? old-store-key "data") (do "data" [])
(includes? old-store-key "meta")
(vec
(let [meta-base (str base "/meta")]
(loop [meta-list-keys #{}
[meta-key & meta-store-keys] (list-files meta-base)]
(if meta-key
(let [old-path (str meta-base "/" meta-key)
store-key (str meta-key ".ksv")
env (assoc-in env [:msg :keys] old-path)
env (assoc env :operation :read-meta)]
(recur
(conj meta-list-keys
(<?- (migrate-file-v2 backing
old-path
serializer read-handlers write-handlers
env)))
meta-store-keys))
meta-list-keys))))
(includes? old-store-key "B_")
[{:store-key old-store-key
:type :stale-binary
:msg "Old binary file detected. Use bget instead of keys for migration."}]
:else
[(let [old-path (str base "/" old-store-key)
key-vec nil
key (<?- (migrate-file-v1 backing
old-path key-vec
serializer read-handlers write-handlers
env))]
key)])))))
(defn detect-old-file-schema [base]
(reduce
(fn [old-list path]
(let [store-key (-> ^Path path .toString)]
(cond
(or
(includes? store-key "data")
(ends-with? store-key ".ksv")) old-list
(re-find #"meta(?!\S)" store-key) (into old-list (detect-old-file-schema store-key))
:else (into old-list [store-key]))))
#{}
(Files/newDirectoryStream (Paths/get base (into-array String [])))))
(defn connect-fs-store
"Create Filestore in given path.
Optional serializer, read-handlers, write-handlers, buffer-size and config (for fsync) can be changed.
Defaults are
{:base path
:serializer fressian-serializer
:read-handlers empty
:write-handlers empty
:buffer-size 1 MB
:config config} "
[path & {:keys [detect-old-file-schema? ephemeral? config]
:or {detect-old-file-schema? false
ephemeral? (fn [^Path path]
(some #(re-matches % (-> path .getFileName .toString))
[#"\.nfs.*"]))}
:as params}]
;; check config
(let [store-config (merge {:default-serializer :FressianSerializer
:compressor null-compressor
:encryptor null-encryptor
:read-handlers (atom {})
:write-handlers (atom {})
:buffer-size (* 1024 1024)
:opts {:sync? false}
:config (merge {:sync-blob? true
:in-place? false
:lock-blob? true}
config)}
(dissoc params :config))
detect-old-blob (when detect-old-file-schema?
(atom (detect-old-file-schema path)))
_ (when detect-old-file-schema?
(when-not (empty? @detect-old-blob)
(info (count @detect-old-blob) "files in old storage schema detected. Migration for each key will happen transparently the first time a key is accessed. Invoke konserve.core/keys to do so at once. Once all keys are migrated you can deactivate this initial check by setting detect-old-file-schema to false.")))
backing (BackingFilestore. path detect-old-blob ephemeral?)]
(connect-default-store backing store-config)))
(comment
(require '[konserve.protocols :as p :refer [-assoc-in -get-in -get-meta -bget -bassoc]])
(require '[konserve.core :as k])
(require '[clojure.core.async :refer [<!]])
(do
(delete-store "/tmp/konserve")
(def store (<! (connect-fs-store "/tmp/konserve"))))
(<! (-assoc-in store ["bar"] (fn [e] {:foo "OoO"}) 1123123123123123123123123 {:sync? false}))
(<! (k/exists? store "bar" {:sync? false}))
(-get-in store ["bar"] :not-found {:sync? true})
(-assoc-in store ["bar"] (fn [e] {:foo "foo"}) 42 {:sync? true})
(p/-keys store {:sync? true})
(<! (-bassoc store "baz" (fn [e] {:foo "baz"}) (byte-array [1 2 3]) {:sync? false}))
(-bget store "baz" (fn [input] (println input)) {:sync? true})
(defn reader-helper [start-byte stop-byte store-key]
(let [path (Paths/get store-key (into-array String []))
ac (AsynchronousFileChannel/open path (into-array StandardOpenOption [StandardOpenOption/READ]))
file-size (.size ac)
bb (ByteBuffer/allocate (- stop-byte start-byte))]
(.read
ac
bb
start-byte
stop-byte
(proxy [CompletionHandler] []
(completed [res att]
(let [arr-bb (.array bb)
buff-meta (ByteBuffer/wrap arr-bb)
meta-size (.getInt buff-meta)
_ (.clear buff-meta)]
(prn (map #(get arr-bb %) (range 0 4)))))
(failed [t att]
(prn "fail"))))))
(reader-helper 0 4 "/tmp/konserve/2c8e57a6-ed4e-5746-9f7e-af7ff2ac25c5.ksv"))
(comment
(require '[konserve.core :as k])
(def store (connect-fs-store "/tmp/store" :opts {:sync? true}))
(k/assoc-in store ["foo" :bar] {:foo "baz"} {:sync? true})
(k/get-in store ["foo"] nil {:sync? true})
(k/exists? store "foo" {:sync? true})
(k/assoc-in store [:bar] 42 {:sync? true})
(k/update-in store [:bar] inc {:sync? true})
(k/get-in store [:bar] nil {:sync? true})
(k/dissoc store :bar {:sync? true})
(k/append store :error-log {:type :horrible} {:sync? true})
(k/log store :error-log {:sync? true})
(k/bassoc store :binbar (byte-array (range 10)) {:sync? true})
(k/bget store :binbar (fn [{:keys [input-stream]}]
(map byte (slurp input-stream)))
{:sync? true}))
(comment
(require '[konserve.core :as k])
(require '[clojure.core.async :refer [<!]])
(def store (<! (connect-fs-store "/tmp/store")))
(<! (k/assoc-in store ["foo" :bar] {:foo "baz"}))
(<! (k/get-in store ["foo"]))
(<! (k/exists? store "foo"))
(<! (k/assoc-in store [:bar] 42))
(<! (k/update-in store [:bar] inc))
(<! (k/get-in store [:bar]))
(<! (k/dissoc store :bar))
(<! (k/append store :error-log {:type :horrible}))
(<! (k/log store :error-log))
(<!! (k/bassoc store :binbar (byte-array (range 10)) {:sync? false}))
(<!! (k/bget store :binbar (fn [{:keys [input-stream]}]
(map byte (slurp input-stream)))
{:sync? false})))