Graalvm to run wasm from spring boot

Graalvm is AOT compilation advanced JDK, I am following the project since 2019, Project’s first target was AOT now lately I start seeing more about multi language support. It supports Python, JS, Ruby, Wasm more details here

And WASM is getting popular day by day, WASM is a new binary file for web. There are many cool examples of WASM

• Doom game in the browser with graalvm
• Postgres database in the browser

I was wondering how to run WASM code in simple spring boot application,

@GetMapping("/addTwo")
public String addTwo() {
    try (Context context = Context.create()) {
        URL wasmFile = WasmdemoApplication.class.getResource("/test.wasm");
        String moduleName = "main";
        context.eval(Source.newBuilder("wasm", wasmFile).name(moduleName).build());
        Value addTwo = context.getBindings("wasm").getMember(moduleName).getMember("addTwo");
        return "addTwo(40, 2) = " + addTwo.execute(40, 2);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

It is not much but very good starting point how to run WASM from java with #GraalVM. Find full running code here

How looks in the browser

If we check how wasm file described in bash

References:

• Nice Blog Showing How Other People Use WASM
• Main WASM Page