/**
 * This class holds the information required to enable resuming a Maven build with {@code --resume}.
 */
public class BuildResumptionData {
    /**
     * The list of projects that remain to be built.
     */
    private final List<String> remainingProjects;

    public BuildResumptionData(final List<String> remainingProjects) {
        this.remainingProjects = remainingProjects;
    }

    /**

    @Override
    public void persistResumptionData(MavenProject rootProject, BuildResumptionData buildResumptionData)
            throws BuildResumptionPersistenceException {
        Properties properties = convertToProperties(buildResumptionData);

        Path resumeProperties = Paths.get(rootProject.getBuild().getDirectory(), RESUME_PROPERTIES_FILENAME);
        try {

     * so.
     *
     * @param rootProject The root project that is being built.
     * @param buildResumptionData Information needed to resume the build.
     * @throws BuildResumptionPersistenceException When an error occurs while persisting data.
     */
    void persistResumptionData(MavenProject rootProject, BuildResumptionData buildResumptionData)
            throws BuildResumptionPersistenceException;

    /**

public interface BuildResumptionAnalyzer {
    /**
     * Construct an instance of {@link BuildResumptionData} based on the outcome of the current Maven build.
     * @param result Outcome of the current Maven build.
     * @return A {@link BuildResumptionData} instance or {@link Optional#empty()} if resuming the build is not possible.
     */
    Optional<BuildResumptionData> determineBuildResumptionData(MavenExecutionResult result);

        MavenProject projectB = createFailedMavenProject("B");
        executionResult.setTopologicallySortedProjects(asList(projectA, projectB));

        Optional<BuildResumptionData> result = analyzer.determineBuildResumptionData(executionResult);

        assertTrue(result.isPresent(), "Expected " + result + ".isPresent() to return true");

public class DefaultBuildResumptionAnalyzer implements BuildResumptionAnalyzer {
    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultBuildResumptionAnalyzer.class);

    @Override
    public Optional<BuildResumptionData> determineBuildResumptionData(final MavenExecutionResult result) {
        if (!result.hasExceptions()) {
            return Optional.empty();
        }