Autoconfigure Undertow/XNIO for virtual thread support

[g-dx]

Hi,

With the release of Spring Boot 3.2 a new property spring.threads.virtual.enabled was added which, amongst other classes, configured Tomcat and Jetty HTTP request handling to be performed using a virtual thread executor.

Are there any plans to also provide out of the box support for Undertow?

[philwebb]

I believe we may have looked into it but couldn't find the same kind of virtual thread support that Tomcat and Jetty were offering. @g-dx Have you seen any examples of how to configure Undertow to make use of virtual threads?

[ChunMengLu]

@philwebb @g-dx How about this:

@Bean
public UndertowDeploymentInfoCustomizer undertowDeploymentInfoCustomizer() {
 return deploymentInfo -> deploymentInfo.setExecutor(Executors.newVirtualThreadPerTaskExecutor());
}

[wilkinsona]

Thanks, @ChunMengLu. We'll look at doing this automatically in Spring Boot 3.3.