gistfile1.java

import jdk.nashorn.api.scripting.ScriptObjectMirror;

import javax.script.*;


public class LeakTest {
  public static void main(String[] args) {
    new LeakTest().run();
  }

  private String script1 =
      "function foo() { \n" +
          "_javaobject.setFunction(org.vertx.java.platform.impl.LeakTest);";

  private void run() {
    try {
      ScriptEngineManager factory = new ScriptEngineManager();
      ScriptEngine engine = factory.getEngineByName("nashorn");

      // Run script1 in it's own scope
      ScriptContext ctx = new SimpleScriptContext();
      Bindings bindings = engine.createBindings();
      bindings.put("_javaobject", this);
      ctx.setBindings(bindings, ScriptContext.ENGINE_SCOPE);
      engine.eval(script1, ctx);

    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  // This allows us to pass an JavaScript object from one scope to another
  public void setFunction(ScriptObjectMirror function) {
    System.out.println("Class of function is: " + function.getClass().getName());
  }



}