Vert.x Starter Not Working With Gradle

[Nick Apperley]

Working through the Vert.x tutorial series and have reached the bottom of the first blog post. Trying to run the Vert.x program (written in Kotlin 1.0.6) with Gradle via its run task and end up with the following output:

:compileKotlin UP-TO-DATE
:compileJava UP-TO-DATE
:copyMainKotlinClasses UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
Jan 22, 2017 4:42:15 PM io.vertx.core.Starter
INFO:     vertx run <main> [-options]                                                
        runs a verticle called <main> in its own instance of vert.x.        


    valid options are:


// ....

Can run the program manually through java in the terminal just fine after executing the jar Gradle task. Below is the contents of build.gradle:

group 'io.vertx.blog'
version '0.1-SNAPSHOT'

buildscript {
    ext.kotlin_version = '1.0.6'

    repositories {
        mavenCentral()
    }
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

apply plugin: 'kotlin'
apply plugin: 'application'


repositories {
    mavenCentral()
}

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile 'io.vertx:vertx-core:3.3.3'
    testCompile 'io.vertx:vertx-unit:3.3.3'
    testCompile 'junit:junit:4.12'
}

run {
    mainClassName = 'io.vertx.core.Starter'
}

jar {
    from configurations.compile.collect { zipTree it }
    manifest.attributes 'Main-Class': 'io.vertx.core.Starter'
    manifest.attributes 'Main-Verticle': 'io.vertx.blog.first.MyFirstVerticle'
}

What is needed to get the Gradle run task to work successfully?

[Asher Tarnopolski]

main-class should be io.vertx.core.Launcher

[Alexander Lehmann]

Looks like this is wrong in the tutorial example, but its correct in the example code on github.

@Clement: could you take a look at the pom.xml in the blog text please?

[Clement Escoffier]

Hi,

The blog post has been written while we were using the Starter class. I had updated the source code, but yes… forgot the blog post.

Clement

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[Nick Apperley]

Changed build.gradle file to the following:

// ...
def mainVerticle = 'io.vertx.blog.first.MyFirstVerticle'
def mainClass = 'io.vertx.core.Launcher'


run {
    mainClassName = mainClass
    args = ['run', mainVerticle]
}
// ...

Can now get the program to run successfully.