async-threadlocal.clj

(require '[clara.rules.durability.fressian :as cf]
         '[clara.rules.platform :as pform]
         '[clara.rules.durability :as d]
         '[clojure.data.fressian :as fres]
         '[clojure.core.async :as async]
         '[clojure.java.io :as io])




(def ch (async/chan))

(async/go
  (with-open [out (io/output-stream "test.fress")]
    (with-open [wrt (fres/create-writer out :handlers cf/write-handler-lookup)]
      (pform/thread-local-binding
       [d/clj-struct-holder (java.util.IdentityHashMap.)]
       (loop []
         (when-let [v (async/<! ch)]
           (fres/write-object wrt v)
           (recur)))))))


(async/>!! ch [1 2 3])



#_"Exception in thread \"async-dispatch-2\" java.lang.NullPointerException
	at clara.rules.durability$clj_struct__GT_idx.invokeStatic(durability.clj:88)
	at clara.rules.durability$clj_struct__GT_idx.invoke(durability.clj:83)
	at clara.rules.durability.fressian$create_identity_based_handler$reify__13402.write(fressian.clj:206)
	at org.fressian.FressianWriter.doWrite(FressianWriter.java:449)"