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dainiusjocas/graalvm-js-multihtreaded-locking.clj

Created March 12, 2021 11:32
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GraalVM Javascript context locking to enable multithreaded access
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graalvm-js-multihtreaded-locking.clj
(import (org.graalvm.polyglot Value Context HostAccess)
(java.util Map)
(org.graalvm.polyglot.proxy ProxyObject))
(let [js-fn-constructor (fn [^String script]
(let [^Context ctx (.build (Context/newBuilder (into-array String ["js"])))
^Value f (.eval ctx "js" script)]
(fn [value]
(locking ctx
(.execute f (object-array [value]))))))
js-fn (js-fn-constructor "(val) => console.log(val)")]
(js-fn {:foo "bar"}))
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The multithreaded Javascript is described here https://medium.com/graalvm/multi-threaded-java-javascript-language-interoperability-in-graalvm-2f19c1f9c37b.

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