*
 * @since 3.0
 */
public final class ProjectSegment {
    private final MavenProject project;

    private final TaskSegment taskSegment;

    private final MavenSession session;

    private final List<MavenProject> nonTransitiveUpstreamProjects;

    private final List<MavenProject> transitiveUpstreamProjects;

 *
 * @since 3.0
 */
public class ProjectBuildList implements Iterable<ProjectSegment> {
    private final List<ProjectSegment> items;

    public ProjectBuildList(List<ProjectSegment> items) {
        this.items = Collections.unmodifiableList(items);
    }

    // TODO Optimize; or maybe just rewrite the whole way aggregating mojos are being run.

public class ThreadOutputMuxer {
    private final Iterator<ProjectSegment> projects;

    private final ThreadLocal<ProjectSegment> projectBuildThreadLocal = new ThreadLocal<>();

    private final Map<ProjectSegment, ByteArrayOutputStream> streams = new HashMap<>();

    private final Map<ProjectSegment, PrintStream> printStreams = new HashMap<>();

        for (MavenProject mavenProject : analyzer.getRootSchedulableBuilds()) {
            ProjectSegment projectSegment = projectBuildList.get(mavenProject);
            logger.debug("Scheduling: {}", projectSegment.getProject());
            Callable<ProjectSegment> cb = createBuildCallable(
                    rootSession, projectSegment, reactorContext, taskSegment, muxer, duplicateArtifactIds);
            service.submit(cb);
        }

    }

    public Future<ProjectSegment> submit(Callable<ProjectSegment> task) {
        FutureTask<ProjectSegment> projectBuildFutureTask = new FutureTask<>(task);
        projectBuildFutureTasks.add(projectBuildFutureTask);
        if (finishImmediately) {
            projectBuildFutureTask.run();
        }
        return projectBuildFutureTask;
    }

    public Future<ProjectSegment> submit(Runnable task, ProjectSegment result) {

        ExecutorService executor = Executors.newFixedThreadPool(10);
        CompletionService<ProjectSegment> service = new ExecutorCompletionService<>(executor);

        List<Future<ProjectSegment>> futures = new ArrayList<>();
        for (ProjectSegment projectBuild : projectBuildList) {
            final Future<ProjectSegment> buildFuture =
                    service.submit(new Outputter(threadOutputMuxer, projectBuild, lyrics.next()));

                    PluginResolutionException, LifecyclePhaseNotFoundException, LifecycleNotFoundException {
        final List<ProjectSegment> list = getProjectBuilds(session);
        return new ProjectBuildList(list);
    }

    public static List<ProjectSegment> getProjectBuilds(MavenSession session)
            throws InvalidPluginDescriptorException, PluginVersionResolutionException, PluginDescriptorParsingException,

 *
 * @since 3.0
 */
@Named
@Singleton
public class BuildListCalculator {
    public ProjectBuildList calculateProjectBuilds(MavenSession session, List<TaskSegment> taskSegments) {
        List<ProjectSegment> projectBuilds = new ArrayList<>();

        MavenProject rootProject = session.getTopLevelProject();

        for (TaskSegment taskSegment : taskSegments) {
            List<MavenProject> projects;

import java.util.List;
import java.util.Set;

import org.apache.maven.execution.ProjectDependencyGraph;
import org.apache.maven.lifecycle.internal.ProjectBuildList;
import org.apache.maven.lifecycle.internal.ProjectSegment;
import org.apache.maven.project.MavenProject;

/**
 * <p>
 * Presents a view of the Dependency Graph that is suited for concurrent building.
 * </p>

            return;
        }

        logger.debug("=== REACTOR BUILD PLAN ================================================");

        for (Iterator<ProjectSegment> it = projectBuilds.iterator(); it.hasNext(); ) {
            ProjectSegment projectBuild = it.next();

            logger.debug("Project: " + projectBuild.getProject().getId());
            logger.debug("Tasks:   " + projectBuild.getTaskSegment().getTasks());