Creating record from Clojure results into "Cannot cast com.aerospike.client.Bin to [Lcom.aerospike.client.Bin;"

[andreiursan]

Trying to create aerospike records, using the client e.g. version [com.aerospike/aerospike-client "3.0.34"] or [com.aerospike/aerospike-client "3.0.20"]
results in the following error:
ClassCastException Cannot cast com.aerospike.client.Bin to [Lcom.aerospike.client.Bin; java.lang.Class.cast (Class.java:3133)

(ns todo-aerospike.domain.utils.db
  (:import [com.aerospike.client Bin AerospikeClient Key Record Info]
           [com.aerospike.client.cluster Node]
           [com.aerospike.client.policy WritePolicy]))

(def key-namespace "todo-aerospike")
(def write-policy (new WritePolicy))

(defn uuid []
  (str (java.util.UUID/randomUUID)))

(defn create [conn data]
  "[C]RUD creates a record  "
  (let [bin (new Bin (:column-name data) (:value data))
        key (new Key key-namespace (:set-name data) (uuid))]
        (println (.getClass bin)) ; for Debug
        (. conn put write-policy key bin)))

trying to create a record from the repl, results in the mentioned error

➜  todo-aerospike git:(master) ✗ lein repl
nREPL server started on port 53426 on host 127.0.0.1 - nrepl://127.0.0.1:53426
REPL-y 0.3.5, nREPL 0.2.6
Clojure 1.6.0
Java HotSpot(TM) 64-Bit Server VM 1.7.0_67-b01
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
    Exit: Control+D or (exit) or (quit)
 Results: Stored in vars *1, *2, *3, an exception in *e

=> (in-ns 'todo-aerospike.domain.utils.db)
=> (def conn (new AerospikeClient "localhost" 3000))
=> (first (.getNodes conn))
#<Node BB976C89B270008 127.0.0.1:3000>
=>  (create conn { :column-name "test" :value "work you client" :set-name "test" })
com.aerospike.client.Bin

ClassCastException Cannot cast com.aerospike.client.Bin to [Lcom.aerospike.client.Bin;  java.lang.Class.cast (Class.java:3133)

and this is the stacktrace

java.lang.ClassCastException: Cannot cast com.aerospike.client.Bin to [Lcom.aerospike.client.Bin;
        at java.lang.Class.cast(Class.java:3133)
        at clojure.lang.Reflector.boxArg(Reflector.java:427)
        at clojure.lang.Reflector.boxArgs(Reflector.java:460)
        at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:58)
        at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
        at todo_aerospike.domain.utils.db$eval6145.invoke(form-init4786145880839548089.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:6703)
        at clojure.lang.Compiler.eval(Compiler.java:6666)
        at clojure.core$eval.invoke(core.clj:2927)
        at clojure.main$repl$read_eval_print__6625$fn__6628.invoke(main.clj:239)
        at clojure.main$repl$read_eval_print__6625.invoke(main.clj:239)
        at clojure.main$repl$fn__6634.invoke(main.clj:257)
        at clojure.main$repl.doInvoke(main.clj:257)
        at clojure.lang.RestFn.invoke(RestFn.java:1523)
        at clojure.tools.nrepl.middleware.interruptible_eval$evaluate$fn__5548.invoke(interruptible_eval.clj:67)
        at clojure.lang.AFn.applyToHelper(AFn.java:152)
        at clojure.lang.AFn.applyTo(AFn.java:144)
        at clojure.core$apply.invoke(core.clj:624)
        at clojure.core$with_bindings_STAR_.doInvoke(core.clj:1862)
        at clojure.lang.RestFn.invoke(RestFn.java:425)
        at clojure.tools.nrepl.middleware.interruptible_eval$evaluate.invoke(interruptible_eval.clj:51)
        at clojure.tools.nrepl.middleware.interruptible_eval$interruptible_eval$fn__5590$fn__5593.invoke(interruptible_eval.clj:183)
        at clojure.tools.nrepl.middleware.interruptible_eval$run_next$fn__5583.invoke(interruptible_eval.clj:152)
        at clojure.lang.AFn.run(AFn.java:22)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

---

I want to creat an aerospike todo app to showcase the client API.
here is the github repo https://github.com/andreiursan/todo-aerospike

[puredanger]

[Lcom.aerospike.client.Bin; is the Java class name for an array of Bin. In (. conn put write-policy key bin), maybe the last thing takes Bin... in the Java API? If so, Java varargs look like an array to the JVM and you'll need this in Clojure:
(. conn put write-policy key (into-array [bin]))

[andreiursan]

@puredanger That fixed my issue.
And I learned something new, feeling great, thank you!

the fixed function is:

(defn create [conn data]
  "[C]RUD creates a record"
  (let [bin (new Bin (:column-name data) (:value data))
        key (new Key key-namespace (:set-name data) (uuid))]
        (. conn put write-policy key (into-array [bin]))))