@RestController
public class AsyncController {

    @PostMapping("/submit")
    public Mono<Void> submit(@RequestBody String data) {
        return Mono.fromSupplier(() -> {
            // 异步处理数据
        }).subscribeOn(Schedulers.boundedElastic());
    }
}

public class AsyncVertxHandler implements Handler<HttpRequest> {

    @Override
    public void handle(HttpRequest request) {
        Promise<String> resultPromise = Promise.promise();

        vertx.executeBlocking(blockingHandler -> {
            // 异步处理请求
            blockingHandler.complete("结果");
        }, resultPromise);

        resultPromise.future().onComplete(result -> {
            HttpServerResponse response = request.response();
            response.putHeader("Content-Type", "text/plain");
            response.end(result.result());
        });
    }
}