public static final String UPDATE_POLICY_INTERVAL = "interval";

    public static final String CHECKSUM_POLICY_FAIL = "fail";

    public static final String CHECKSUM_POLICY_WARN = "warn";

    public static final String CHECKSUM_POLICY_IGNORE = "ignore";

    public static final String DEFAULT_CHECKSUM_POLICY = CHECKSUM_POLICY_FAIL;

    private boolean enabled;

    private String updatePolicy;

    private String checksumPolicy;

            // continue the build but ban all projects that depend on the failed one
            buildContext.getReactorBuildStatus().blackList(mavenProject);
        } else if (MavenExecutionRequest.REACTOR_FAIL_FAST.equals(rootSession.getReactorFailureBehavior())) {
            buildContext.getReactorBuildStatus().halt();
        } else {

    }

    public static String toRepositoryChecksumPolicy(final String artifactRepositoryPolicy) {
        switch (artifactRepositoryPolicy) {
            case RepositoryPolicy.CHECKSUM_POLICY_FAIL:
                return RepositoryPolicy.CHECKSUM_POLICY_FAIL;
            case RepositoryPolicy.CHECKSUM_POLICY_IGNORE:
                return RepositoryPolicy.CHECKSUM_POLICY_IGNORE;
            case RepositoryPolicy.CHECKSUM_POLICY_WARN:

            org.apache.maven.api.model.RepositoryPolicy policy) {
        boolean enabled = true;
        String updatePolicy = RepositoryPolicy.UPDATE_POLICY_DAILY;
        String checksumPolicy = RepositoryPolicy.CHECKSUM_POLICY_FAIL;
        if (policy != null) {
            enabled = policy.isEnabled();
            if (policy.getUpdatePolicy() != null) {
                updatePolicy = policy.getUpdatePolicy();
            }

    // Reactor Failure Mode
    // ----------------------------------------------------------------------

    String REACTOR_FAIL_FAST = "FAIL_FAST";

    String REACTOR_FAIL_AT_END = "FAIL_AT_END";

    String REACTOR_FAIL_NEVER = "FAIL_NEVER";

    // ----------------------------------------------------------------------
    // Reactor Make Mode

            org.apache.maven.api.model.RepositoryPolicy policy) {
        boolean enabled = true;
        String updatePolicy = RepositoryPolicy.UPDATE_POLICY_DAILY;
        String checksumPolicy = RepositoryPolicy.CHECKSUM_POLICY_FAIL;
        if (policy != null) {
            enabled = policy.isEnabled();
            if (policy.getUpdatePolicy() != null) {
                updatePolicy = policy.getUpdatePolicy();
            }

    void testChecksumVerification() throws Exception {
        ArtifactRepositoryPolicy policy = new ArtifactRepositoryPolicy(
                true, ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS, ArtifactRepositoryPolicy.CHECKSUM_POLICY_FAIL);

        ArtifactRepository repo = artifactRepositoryFactory.createArtifactRepository(
                "id", "string://url", new ArtifactRepositoryLayoutStub(), policy, policy);

     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link ToolchainsBuilderException}.
     *
     * @return the problems that were encountered during the settings building, can be empty but never {@code null}
     */
    @Nonnull
    List<BuilderProblem> getProblems();

            // The root locator can be used very early during the setup of Maven,
            // even before the arguments from the command line are parsed.  Any exception
            // that would happen here should cause the build to fail at a later stage
            // (when actually parsing the POM) and will lead to a better exception being
            // displayed to the user, so just bail out and return false.
        }
        return false;
    }

/**
 */
class DefaultExceptionHandlerTest {
    /**
     * Running Maven under JDK7 may cause connection issues because IPv6 is used by default.
     * <p>
     * e.g running mvn site:run will cause Jetty to fail.
     * </p>
     * <p>
     * The resolution is to add -Djava.net.preferIPv4Stack=true to the command line as documented in
     * http://cwiki.apache.org/confluence/display/MAVEN/ConnectException
     * </p>
     */