java

Metaparticle/Package for Java

Metaparticle/Package is a collection of libraries intended to make building and deploying containers a seamless and idiomatic experience for developers.

This is the implementation for Java.

Introduction

Metaparticle/Package simplifies and centralizes the task of building and deploying a container image.

Here is a quick example.

Consider this simple Java application:

public class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}

To containerize this application, you need to add the @Package annotation and the Containerize wrapper function like this:

import io.metaparticle.annotations.Package;
import static io.metaparticle.Metaparticle.Containerize;

public class Main {
    @Package(repository="brendanburns",
             jarFile="path/to/my-fat-jar.jar")
    public static void main(String[] args) {
        Containerize(() -> {
            System.out.println("Hello Metaparticle/Package");
        });
    }
}

You can then compile this application just as you have before. But now, when you run the application, instead of printing "Hello world", it first packages itself as a container, and then (optionally) deploys itself inside that container.

Tutorial

For a more complete exploration of the Metaparticle/Package for Java, please see the in-depth tutorial.