Using Context : How to pass script level variables?

[nmondal]

In the ScriptEngine paradigm - things were simple.
Create a CompiledScript and ask it to evaluate with Bindings.
Like this:

https://docs.oracle.com/en/java/javase/11/docs/api/java.scripting/javax/script/CompiledScript.html#eval(javax.script.Bindings)

I am wondering in graal - with Context, how to do it?
Admittedly I tried putMember in the Context Binding - it did not work.

context.getBindings("js").putMember("N", 2000);
context.getBindings("js").putMember("EXPECTED", 17393);
context.eval(Source.newBuilder("js", SOURCE, "src.js").build());
Value primesMain = context.getBindings("js").getMember("primesMain");

I am finding myself a bit foolish and clueless here, how to achieve this?

Actually, right now I am using graaljs via ScriptEngine, so this problem is not an issue. But I am planning to migrate all graal powered languages into a much more "Context" based design - and this is blocking nmondal/cowj#148

[iamstolis]

Admittedly I tried putMember in the Context Binding - it did not work.

Could you, please, provide a complete test-case showing the problem?

[nmondal]

Hello @iamstolis , seems like it was my mistake and I had a brain freeze or something.
Here is an example that perfectly runs.

package com.mycompany.app;

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.Source;
import org.graalvm.polyglot.Value;
import org.junit.Test;

public class VariableInjectionTest {

    @Test
    public void variableInject(){
        final String src = "function add(){ return a+b; } ; add(); " ;
        try (Context context = Context.create()) {
            context.getBindings("js").putMember("a", 10);
            context.getBindings("js").putMember("b", 32);
            Value v = context.eval(Source.newBuilder("js", src, "src.js").build());
            System.out.println(v.asInt());
        }catch ( Throwable th){
            th.printStackTrace();
        }
    }
}

I am sorry for the confusion, and the extra work.
Thank you!

Just a quick question, are these contexts thread safe? can I inject variables from different threads and would they work?
I found this link though:
https://stackoverflow.com/questions/63451148/graalvm-polyglot-thread-issue-in-java-spring-boot-application