<a href="https://www.graalvm.org/" target="_blank" rel="noopener nofollow">Graalvm</a> 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 <a href="https://www.graalvm.org/latest/reference-manual/languages/" target="_blank" rel="noopener nofollow">here</a>
And WASM is getting popular day by day, WASM is a new binary file for web. There are many cool examples of WASM
<ul>
<li><a href="https://github.com/stepstone-tech/doom-graalvm" target="_blank" rel="noopener nofollow">Doom game in the browser with graalvm</a></li>
<li><a href="https://github.com/electric-sql/pglite" target="_blank" rel="noopener nofollow">Postgres database in the browser</a></li>
</ul>
I was wondering how to run WASM code in simple spring boot application,
<pre><code class="language-java">@GetMapping(&quot;/addTwo&quot;)
public String addTwo() {
 try (Context context = Context.create()) {
 URL wasmFile = WasmdemoApplication.class.getResource(&quot;/test.wasm&quot;);
 String moduleName = &quot;main&quot;;
 context.eval(Source.newBuilder(&quot;wasm&quot;, wasmFile).name(moduleName).build());
 Value addTwo = context.getBindings(&quot;wasm&quot;).getMember(moduleName).getMember(&quot;addTwo&quot;);
 return &quot;addTwo(40, 2) = &quot; + addTwo.execute(40, 2);
 } catch (IOException e) {
 throw new RuntimeException(e);
 }
}
</code></pre>
It is not much but very good starting point how to run WASM from java with #GraalVM. Find full running code <a href="https://github.com/ozkanpakdil/spring-examples/blob/master/wasmdemo/readme.md" target="_blank" rel="noopener nofollow">here</a>
How looks in the browser
<img src="https://github.com/user-attachments/assets/36b1b221-1b02-4ed3-a5a1-903b322d9de6" alt="wasm returned from graalvm in browser">
If we check how wasm file described in bash
<img src="https://github.com/user-attachments/assets/f26ff1df-fde2-4f86-9fe9-84c4f8b01547" alt="file wasm in bash">

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GraalVM is an advanced JDK with AOT compilation and multi-language support including Python, JS, Ruby, and WASM. The post explores how to use WebAssembly (WASM) within a Spring Boot application, providing a simple example with code snippet demonstrating how to run WASM from Java using GraalVM.

How to use WASM from Spring Boot