How to start Vert.x server from IntelliJ IDEA?

Question

How do I start a simple Vert.x server from inside IntelliJ IDEA?

My build.gradle is as below:

apply plugin: 'java'  version = '3.0.0'  repositories {     mavenCentral() }  dependencies {     compile 'io.vertx:vertx-core:3.0.0' } 

My Vertx-server, MyVertex.java is as below:

package com.example;  import io.vertx.core.AbstractVerticle; import io.vertx.core.Future;  public class MyVerticle extends AbstractVerticle {      @Override     public void start(Future<Void> fut) {         vertx.createHttpServer()                 .requestHandler(r -> r.response().end("<h1>Hello</h1>"))                 .listen(8081);     } } 

And my IntelliJ run configuration is as below, with io.vertx.core.Starteras main class:

But when I run it with my run configuration I get this error message:

Error: Could not find or load main class run 

Is the VM option (in Run configuration) run something I need to install and add to my path or how do I get started with Vert.x-server development?

Answer 1

I'm using vertx 3.2.1 and it's complaining about io.vertx.core.Starter. It's deprecated now. So, one should use io.vertx.core.Launcher.

This is an example of launching via intellij with the option of specifying a config JSON file:

• Main Class: io.vertx.core.Launcher
• VM Options: <up to you, or leave blank>
• Program Arguments: run com.app.verticle.MyVerticle -conf /path/to/my_config.json

When using a logging framework it will be added in VM Options as below.

Log4j with either log4j or slf4j delgate:

-Dvertx.logger-delegate-factory-class-name=io.vertx.core.logging.Log4jLogDelegateFactory -Dlog4j.configuration=log4j.xml  -Dvertx.logger-delegate-factory-class-name=io.vertx.core.logging.SLF4JLogDelegateFactory -Dlog4j.configuration=log4j.xml 

Logback:

-Dvertx.logger-delegate-factory-class-name=io.vertx.core.logging.SLF4JLogDelegateFactory -Dlogback.configurationFile=logback.xml 

Answer 2

Simply add this to your MyVerticle (or a separate class):

import io.vertx.core.Launcher; ... public static void main(final String[] args) {     Launcher.executeCommand("run", MyVerticle.class.getName()); } 

Then simply Ctrl+Shift+F10 to run it and IntelliJ will automatically create the Run Configuration.