StarOperator.java

package org.arquillian.cube.docker.impl.client.config;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Random;
import java.util.UUID;

public class StarOperator {

    private static Random random = new Random();

    private StarOperator(){
    }

    public static void adaptPortBindingToParallelRun(CubeContainer cubeContainer) {
        final Collection<PortBinding> portBindings = cubeContainer.getPortBindings();
        if (portBindings == null) {
            return;
        }
        for (PortBinding portBinding : portBindings) {
            final int randomPrivatePort = generateRandomPrivatePort();
            portBinding.setBound(randomPrivatePort);
        }
    }

    public static void adaptLinksToParallelRun(UUID uuid, CubeContainer cubeContainer) {
        final Collection<Link> links = cubeContainer.getLinks();

        if (links == null) {
            return;
        }

        for (Link link : links) {
            if (link.getName().endsWith("*")) {
                String linkTemplate = link.getName().substring(0, link.getName().lastIndexOf('*'));
                link.setName(generateNewName(linkTemplate, uuid));

                String environmentVariable = linkTemplate.toUpperCase() + "_HOSTNAME=" + link.getName();
                if (link.isAliasSet()) {
                    link.setAlias(generateNewName(link.getAlias(), uuid));
                    environmentVariable = linkTemplate.toUpperCase() + "_HOSTNAME=" + link.getAlias();
                }

                final Collection<String> env = cubeContainer.getEnv();
                if (env != null) {
                    // to avoid duplicates
                    if (env.contains(environmentVariable)) {
                        env.remove(environmentVariable);
                    }
                } else {
                    cubeContainer.setEnv(new ArrayList<>());
                }
                cubeContainer.getEnv().add(environmentVariable);
            }
        }
    }

    public static String generateNewName(String containerName, UUID uuid) {
        return containerName + "_" + uuid;
    }

    private static int generateRandomPrivatePort() {
        final int randomPort = random.nextInt(16383);
        return randomPort + 49152;
    }
}