-
Notifications
You must be signed in to change notification settings - Fork 81
/
serdes.clj
72 lines (56 loc) · 1.88 KB
/
serdes.clj
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
(ns jackdaw.serdes
"Implements string and EDN serdes (serializer/deserializer)."
(:gen-class)
(:require [clojure.edn]
[jackdaw.serdes.fn :as jsfn])
(:import java.nio.charset.StandardCharsets
org.apache.kafka.common.serialization.Serde
org.apache.kafka.common.serialization.Serdes))
(set! *warn-on-reflection* true)
(defn to-bytes
"Converts a string to a byte array."
[data]
(.getBytes ^String data StandardCharsets/UTF_8))
(defn- from-bytes
"Converts a byte array to a string."
[^bytes data]
(String. data StandardCharsets/UTF_8))
(defn string-serde
[]
(Serdes/String))
(defn edn-serializer
"Returns an EDN serializer."
[]
(jsfn/new-serializer {:serialize (fn [_ _ data]
(when data
(to-bytes
(binding [*print-length* false
*print-level* false]
(pr-str data)))))}))
(defn edn-deserializer
"Returns an EDN deserializer."
([]
(edn-deserializer {}))
([opts]
(let [opts (into {} opts)]
(jsfn/new-deserializer {:deserialize (fn [_ _ data]
(->> (from-bytes data)
(clojure.edn/read-string opts)))}))))
(defn edn-serde
"Implements an EDN SerDes (Serializer/Deserializer).
The behavior of this serde differs from the one in
jackdaw.serdes.edn. It does not print a newline."
[& [opts]]
(Serdes/serdeFrom (edn-serializer) (edn-deserializer opts)))
(gen-class
:name "jackdaw.serdes.EdnSerde"
:implements [org.apache.kafka.common.serialization.Serde]
:prefix "EdnSerde-")
(def EdnSerde-configure
(constantly nil))
(defn EdnSerde-serializer
[& _]
(edn-serializer))
(defn EdnSerde-deserializer
[& _]
(edn-deserializer))