So I’ve run the experiment and the Rhino engine reports “Mozilla Rhino” is MULTITHREADED which the JavaDocs asserts “MULTITHREADED” – The engine implementation is internally thread-safe and scripts may execute concurrently although effects of script execution on one thread may be visible to scripts on other threads.” Here’s the code…it looks threadsafe to me, as … Read more
If you’re using either Node.js or Narwhal, only use packages and modules that advertise compatibility with your respective engine. There are presently many nuances to writing applications, packages, and modules that work on both engines. Kris Zyp from Dojo has put quite a bit of effort into making his packages work on both systems and … Read more
To guard against infinite loops, you can observe the instruction count as the script runs (this works only with interpreted scripts, not with compiled ones). There is this example in the Rhino JavaDocs to prevent a script from running for more than ten seconds: protected void observeInstructionCount(Context cx, int instructionCount) { MyContext mcx = (MyContext)cx; … Read more
Use ScriptEngine.eval(java.io.Reader) to read the script ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName(“JavaScript”); // read script file engine.eval(Files.newBufferedReader(Paths.get(“C:/Scripts/Jsfunctions.js”), StandardCharsets.UTF_8)); Invocable inv = (Invocable) engine; // call function from script file inv.invokeFunction(“yourFunction”, “param”);
There are various approaches to JavaScript execution, even when doing JIT. V8 and Nitro (formerly known as SquirrelFish Extreme) choose to do a whole-method JIT, meaning that they compile all JavaScript code down to native instructions when they encounter script, and then simply execute that as if it was compiled C code. SpiderMonkey uses a … Read more