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Cloudopt Next

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Cloudopt Next is a very lightweight and modern, JVM-based, full stack kotlin framework designed for building modular, easily testable JVM applications with support for Java, Kotlin language, crafted from the best of breed Java libraries and standards.

Cloudopt Next has the following features:

Simple Minimalist design, almost no configuration, no dependence on tomcat, jetty and other web containers.

Asyn Based on vertx, it is easy to achieve high-performance asynchronous services.

Plugin Supports various components of the vertx system, and also supports the extension of functions through plug-ins. The official also provides a large number of useful plug-ins.

Chinese All Chinese documents, Chinese community to help Chinese developers get started quickly


You can view the document by visiting the official website of Cloudopt Next, or you can go to example to see a simple example.


Let's take a look at a simple route based on Cloudopt Next:

class IndexController : Resource() {
    fun get(){
        renderHtml(view = "index")
@API(value = "/")
public class IndexController extends Resource {
    public void get(){
        View v = new View();


fun main(args: Array<String>) {
public static void main(String args[]) {;


class SocketController : SocketJSResource {
    override fun handler(socket: SockJSSocket) {
        socket.handler {message->
            socket.write("Hello world!")


fun main(args: Array<String>) {

Getting help

Having trouble with Cloudopt Next? We’d like to help!

  • Follow our twitter to get the latest information.
  • Check the reference documentation carefully for specific code cases or common problems.
  • If you have a problem with the upgrade, check the upgrade instructions in the Wiki.
  • Send mail to
  • Send issue to your question on GitHub, we will answer it as soon as possible.
  • If you are in China, you can also join the QQ group: 557692142.

Reporting Issues

Cloudopt Next uses GitHub’s integrated issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:

  • Before you log a bug, please search the issue tracker to see if someone has already reported the problem.
  • Please provide as much information as possible with the issue report, we like to know the version of Cloudopt Next that you are using, as well as your Operating System and JVM version.


Cloudopt Next is Open Source software released under the Apache 2.0 license.