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Another configuration question. We would like to use site scoping for configuring one of our applications. We've only used system scope previously, and are comfortable with how that works. The question is, if you create a site-scoped configuration, is there a site-specific UI? Otherwise, what's the point? I understand that site scope will override system scope and give you a default configuration for all sites, but how do you then customize the configuration for each site? Is it necessary to create your own UI in the site settings?

Follow up: I followed the directions in the tutorial (https://help.liferay.com/hc/en-us/articles/360028726152-Scoping-Configurations) but when I retrieve the configuration using a ConfigurationProvider the configuration object doesn't have any config data in it. Here is the relevant code:

@ExtendedObjectClassDefinition(category = "NASA", scope = ExtendedObjectClassDefinition.Scope.GROUP)
@Meta.OCD(
        id = "gov.nasa.hq.cesheets.internal.configuration.CESheetsPortletConfiguration",
        localization = "content/Language",
        name = "CE Sheets Portlet Configuration")
public interface CESheetsPortletConfiguration {
...

public class CESheetsGroupConfigurationBeanDeclaration implements ConfigurationBeanDeclaration {

    @Override
    public Class<?> getConfigurationBeanClass() {

        return CESheetsPortletConfiguration.class;
    }

}
...

@Component(
        configurationPid = "gov.nasa.hq.cesheets.internal.configuration.CESheetsPortletConfiguration",
        configurationPolicy = ConfigurationPolicy.OPTIONAL,
        immediate = true,
        property = {
                "javax.portlet.name=" + CESheetsPortletKeys.CESHEETS
        },
        service = ConfigurationAction.class)
public class CESheetsPortletConfigurationAction extends DefaultConfigurationAction {

    private static final Log _log = LogFactoryUtil.getLog(CESheetsPortletConfigurationAction.class);
    private volatile CESheetsPortletConfiguration _configuration;
    private static final String GRID_CONFIG_DATA = "ROWDATA";

    private ConfigurationProvider _configurationProvider;

    @Reference(unbind = "-")
    protected void setConfigurationProvider(ConfigurationProvider configurationProvider) {
        System.out.println("HERE CONFIG ACTION");
        _configurationProvider = configurationProvider;
    }
...

        try {
            _configuration = _configurationProvider.getGroupConfiguration(CESheetsPortletConfiguration.class, groupId);
        } catch (ConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        String[] states = _configuration.workflowStates();

...

Here, the "states" array is empty although it is configured in the control panel (both system and instance settings). Previously, using SYSTEM scope, it worked fine.