request.setSystemProperties(sysProperties);

        ModelBuildingResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated-1", result.getEffectiveModel().getProperties().get("profile.file"));
        assertNull(result.getEffectiveModel().getProperties().get("profile.miss"));
    }

/**
 * Determines whether a profile should be activated.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface ProfileActivator {

    /**
     * Determines whether the specified profile is active in the given activator context.
     *

     *            {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     * @return The profiles that have been activated, never {@code null}.
     */
    List<Profile> getActiveProfiles(
            Collection<Profile> profiles, ProfileActivationContext context, ModelProblemCollector problems);

    /**
     * Defines external profiles that may be activated for the given model.
     * Those are external profiles usually defined in {@link org.apache.maven.api.settings.Settings#getProfiles()}.
     */
    @Nonnull
    Collection<Profile> getProfiles();

    /**
     * List of profile ids that have been explicitly activated by the user.
     */
    @Nonnull
    List<String> getActiveProfileIds();

            // Use SLF4J formatter for consistency with warnings reported by logger
            final String message = MessageFormatter.format(
                            "The requested profiles {} could not be activated or deactivated because they do not"
                                    + " exist.",
                            notFoundRequiredProfiles)
                    .getMessage();

        request.setPomFile(getPom("simple"));

        ModelBuildingResult result = builder.build(request);
        assertNotNull(result);
        assertNotNull(result.getEffectiveModel());
        assertEquals("activated", result.getEffectiveModel().getProperties().get("profile.file"));
        Xpp3Dom conf = (Xpp3Dom)
                result.getEffectiveModel().getBuild().getPlugins().get(0).getConfiguration();
        assertNotNull(conf);

     */
    @Override
    public void explicitlyActivate(String profileId) {
        if (!activatedIds.contains(profileId)) {
            logger.debug("Profile with id: '" + profileId + "' has been explicitly activated.");

            activatedIds.add(profileId);
        }
    }

    /* (non-Javadoc)
     * @see org.apache.maven.profiles.ProfileManager#explicitlyActivate(java.util.List)
     */
    @Override

     *
     * @return The identifiers of those profiles to activate, never {@code null}.
     */
    List<String> getActiveProfileIds();

    /**
     * Sets the identifiers of those profiles that should be activated by explicit demand.
     *
     * @param activeProfileIds The identifiers of those profiles to activate, may be {@code null}.

    public List<String> getActiveProfileIds() {
        return activeProfileIds;
    }

    /**
     * Sets the identifiers of those profiles that should be activated by explicit demand.
     *
     * @param activeProfileIds The identifiers of those profiles to activate, may be {@code null}.
     * @return This context, never {@code null}.
     */
    public DefaultProfileActivationContext setActiveProfileIds(List<String> activeProfileIds) {

{
   final Logger logger = LoggerFactory.getLogger( MyClass.class );
}
+-----+

* Logger Name

 Logger name is basically the classical fully qualified class name: it's not visible by default, but can be activated (see {{{/maven-logging.html}user documentation}}).

 Notice that before Maven 3.1.0, with logger created by Maven, some code used to pass logger from class to class because it could not create a new logger: