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