java

import io.smallrye.common.annotation.RunOnVirtualThread;
import io.smallrye.mutiny.Uni;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;

import java.time.Duration;

@Path("/hello")
public class GreetingResource {

    @GET
    @Path("virtual")
    @Produces(MediaType.TEXT_PLAIN)
    @RunOnVirtualThread
    public String hello1() {
        return "Hello from virtual thread";
    }

    @GET
    @Path("reactive")
    @Produces(MediaType.TEXT_PLAIN)
    public Uni<String> hello2() {
        return Uni.createFrom().item("Hello from reactive");
    }

    @GET
    @Path("virtual-delay")
    @Produces(MediaType.TEXT_PLAIN)
    @RunOnVirtualThread
    public String hello3() {
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        return "Hello from virtual thread delay";
    }

    @GET
    @Path("reactive-delay")
    @Produces(MediaType.TEXT_PLAIN)
    public Uni<String> hello4() {
        return Uni.createFrom().item("Hello from reactive delay")
                .onItem().delayIt().by(Duration.ofMillis(100));
    }
}