Spring boot demo Virtual Threads

By Spring configuration

With Spring Boot you can enable virtual thread by setting the following property instead of manual configuration. When enabled, Spring Boot leverage virtual threads by using them for various Spring components such as MVC, JDBC and task executors etc.

spring.threads.virtual.enabled=true

By Manual configuration for certain components

Replacing the default Tomcat thread pool with a virtual thread executor. Instead of using a fixed thread pool, Tomcat now creates a new virtual thread for each request.

@Bean
public TomcatProtocolHandlerCustomizer<?> protocolHandlerVirtualThreadExecutorCustomizer() {
    return handler -> handler.setExecutor(Executors.newVirtualThreadPerTaskExecutor());
}

Run the application

$ ./mvnw spring-boot:run

Invoke the service

$ curl localhost:8080
Hello from VirtualThread[#39]/runnable@ForkJoinPool-1-worker-1