Hello. I'm working on a pure kotlin-based web proj...

# server

[Nykykof]

Hello. I'm working on a pure kotlin-based web projetc. It's work fine locally and i want to deploy it on a cloud foundry. But the official Java buildpack does not work for it. Any idea on how i can make this works ? ( I created a channel for it #cloudfoundry)

[gildor]

Do you use Kotlin JVM? Do they support Java? If so what is your problem?

[Nykykof]

1- Yes i use Kotlin JVM, 2- The cloud foundry platform support very well Java ( i deployed another java apps on it). The ussue is that the official buildpack for Java does not work for kotlin. It seems that it support some JMV-languages but i checked and Kotlin seems to not belong to the suppoted JVM-language

[gildor]

But what exactly do you upload? Jar?

[napperley]

Is the buildpack designed to work with a major build system (Gradle, Maven etc)?

[dave]

The CF jdk buildpack will work with a standard application distribution zip out of the box

[Nykykof]

I upload a jar

[Nykykof]

for sure the buildpack works at leaste with Gradle and maven

[gildor]

But there is no difference on jar level between Kotlin and Java

[gildor]

same, it’s transparent if you use Gradle or Maven

[Nykykof]

It's what i told to myself when i pushed the jar file ( no difference between java and Kotlin at jar level). But the cloud foundy throws this error message: ERROR Finalize failed with exception #<RuntimeError: No container can run this application. Please ensure that you've pushed a valid JVM artifact or artifacts using the -p command line argument or path manifest entry. Information about valid JVM artifacts can be found at https://github.com/cloudfoundry/java-buildpack#additional-documentation.

[gildor]

Do you use distZip format?

[gildor]

I still think that there is some problem in your configuration, for example you need some config in META-INF

[gildor]

I mean there is no magic there, just a jar with some classes and probably META-INF to specify entry point

[dave]

@Nykykof the easiest way to do that in gradle is to apply plugin: 'application' and then set a mainClassName = 'fully.qualified.MainKt' <-- the Kt is important if you're using a floating main function as your entry point

[Nykykof]

@dave i use maven. is there an equivalent ?

[dave]

Definitely, although I can't tell you what it is because I'm not exactly a fan of maven 😉

[Nykykof]

@gildor i'm going to explore the way of META-INFO

[gildor]

“way of META-INFO” this is exactly the way what @dave suggested, Gradle plugins does exactly this: configure META for you

[gildor]

http://www.baeldung.com/executable-jar-with-maven

[gildor]

something like this, I suppose. Just not really familiar with Maven

[Nykykof]

ok thanks @dave and @gildor. i will check it

[fitzoh]

Might want to try the #java-buildpack channel in the cloud foundry slack

[fitzoh]

It’s definitely using the java buildpack, right?

[Nykykof]

@fitzoh Yes it's using the java buildpack

[Nykykof]

My pom.xml was not very well configured so the manifest was also bad generated. I still having some issues (having 502 bad gateway error when consuming the APIs) but my app is now runnig on cloudfoundry thanks to @gildor ans @dave