Eventos OSGi para componentes de Communities

Información general

Cuando los miembros interactúan con las funciones de Communities, se envían eventos OSGi que pueden almacenar en déclencheur a los oyentes asincrónicos, como notificaciones o interacción (puntuación e insignias).

El de un componente SocialEvent registra los eventos como actions que se producen para una topic. SocialEvent incluye un método para devolver un verb asociado con la acción. Hay un n-1 relación entre actions y verbs.

Para los componentes de Communities incluidos en la versión, las siguientes tablas describen el verbs definido para cada topic disponible para su uso.

Temas y verbos

Componente de calendario
SocialEvent topic= com/adobe/cq/social/calendar

Componente Comentarios
SocialEvent topic= com/adobe/cq/social/comment

Componente Biblioteca de archivos
SocialEvent topic= com/adobe/cq/social/fileLibrary

Componente de foro
SocialEvent topic= com/adobe/cq/social/forum

Componente de diario
SocialEvent topic= com/adobe/cq/social/journal

Componente de control de calidad
SocialEvent topic = com/adobe/cq/social/qna

Componente de críticas
SocialEvent topic= com/adobe/cq/social/review

Componente de clasificación
SocialEvent topic= com/adobe/cq/social/tally

Componente de votación
SocialEvent topic= com/adobe/cq/social/tally

Componentes con moderación habilitada
SocialEvent topic= com/adobe/cq/social/moderation

Eventos de componentes personalizados

Para un componente personalizado, la variable clase abstracta SocialEvent se debe ampliar d para registrar los eventos del componente como actionsque se producen para una topic.

El evento personalizado anularía el método getVerb() para que un adecuado verbse devuelve para cada action. El verb devuelto por una acción puede ser uno de uso común (como POST) o uno especializado para el componente (como ADD RATING). Hay un n-1 relación entre actionsy verbs.

Pseudocódigo para evento de componente personalizado

org.osgi.service.event.Event;
com.adobe.cq.social.scf.core.SocialEvent;
com.adobe.granite.activity.streams.ObjectTypes;
com.adobe.granite.activitystreams.Verbs;

package com.mycompany.recipe;

import org.osgi.service.event.Event;
import com.adobe.cq.social.scf.core.SocialEvent;
import com.adobe.granite.activitystreams.ObjectTypes;
import com.adobe.granite.activitystreams.Verbs;

/*
 * The Recipe type, passed to RecipeEvent(), would be a custom Recipe class
 * that extends either
 * com.adobe.cq.social.scf.SocialComponent
 * or
 * com.adobe.cq.social.scf.SocialCollectionComponent
 * See https://docs.adobe.com/docs/en/aem/6-2/develop/communities/scf/server-customize.html
 */

/**
 * Defines events that are triggered on a custom component, "Recipe".
 */
public class RecipeEvent extends SocialEvent<RecipeEvent.RecipeActions> {

    private static final long serialVersionUID = 1L;
    protected static final String PARENT_PATH = "PARENT_PATH";

    /**
     * The event topic suffix for Recipe events
     */
    public static final String RECIPE_TOPIC = "recipe";

    /**
     * @param recipe - the recipe resource on which the event was triggered
     * @param userId - the user id of the user who triggered the action
     * @param action - the recipe action that triggered this event
     */
    public RecipeEvent(final Recipe recipe, final String userId, final RecipeEvent.RecipeActions action) {
        String recipePath = recipe.getResource().getPath();
        String parentPath = (recipe.getParentComponent() != null) ?
                             recipe.getParentComponent().getResource().getPath() :
                             recipe.getSourceComponentId();
        this(recipePath, userId, parentPath, action);
    }

    /**
     * @param recipePath - the path to the recipe resource (jcr node) on which the event was triggered
     * @param userId - the user id of the user who triggered the action
     * @param parentPath - the path to the parent node of the recipe resource
     * @param action - the recipe action that triggered this event
     */
    public RecipeEvent(final String recipePath, final String userId, final String parentPath) {
        super(RECIPE_TOPIC, recipePath, userId, action,
              new BaseEventObject(recipePath, ObjectTypes.ARTICLE),
              new BaseEventObject(parentPath, ObjectTypes.COLLECTION),
              new HashMap<String, Object>(1) {
            private static final long serialVersionUID = 1L;
            {
                if (parentPath != null) {
                    this.put(PARENT_PATH, parentPath);
                }

            }
        });
    }

    private RecipeEvent (final Event event) {
      super(event);
    }

    /**
     * List of available recipe actions that can trigger a recipe event.
     */
    public static enum RecipeActions implements SocialEvent.SocialActions {
        RecipeAdded,
        RecipeModified,
        RecipeDeleted;

        @Override
        public String getVerb() {
            switch (this) {
                case RecipeAdded:
                    return Verbs.POST;
                case RecipeModified:
                    return Verbs.UPDATE;
                case RecipeDeleted:
                    return Verbs.DELETE;
                default:
                    throw new IllegalArgumentException("Unsupported action");
            }
        }
    }

}

Ejemplo de EventListener para filtrar datos de flujo de actividad

Es posible escuchar eventos con el fin de modificar lo que aparece en el flujo de actividad.

El siguiente ejemplo de pseudocódigo quitará los eventos de DELETE del componente Comentarios del flujo de actividades.

Pseudocódigo para EventListener

Requiere último paquete de funciones.

package my.company.comments;

import java.util.Collections;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Modified;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.commons.osgi.PropertiesUtil;
import org.osgi.service.component.ComponentContext;

import com.adobe.cq.social.activitystreams.listener.api.ActivityStreamProviderExtension;
import com.adobe.cq.social.commons.events.CommentEvent.CommentActions;
import com.adobe.cq.social.scf.core.SocialEvent;

@Service
@Component(metatype = true, label = "My Comment Delete Event Filter",
        description = "Prevents comment DELETE events from showing up in activity streams")
public class CommentDeleteEventActivityFilter implements ActivityStreamProviderExtension {

    @Property(name = "ranking", intValue = 10)
    protected int ranking;

    @Activate
    public void activate(final ComponentContext ctx) {
        ranking = PropertiesUtil.toInteger(ctx.getProperties().get("ranking"), 10);
    }

    @Modified
    public void update(final Map<String, Object> props) {
        ranking = PropertiesUtil.toInteger(props.get("ranking"), 10);
    }

    @Override
    public boolean evaluate(final SocialEvent<?> evt, final Resource resource) {
        if (evt.getAction() != null && evt.getAction() instanceof SocialEvent.SocialActions) {
            final SocialEvent.SocialActions action = evt.getAction();
            if (StringUtils.equals(action.getVerb(), CommentActions.DELETED.getVerb())) {
                return false;
            }
        }
        return true;
    }

    @Override
    public Map<String, ? extends Object> getActivityProperties(final SocialEvent<?> arg0, final Resource arg1) {
        return Collections.<String, Object>emptyMap();
    }

    @Override
    public Map<String, ? extends Object> getActorProperties(final SocialEvent<?> arg0, final Resource arg1) {
        return Collections.<String, Object>emptyMap();
    }

    @Override
    public String getName() {
        return "My Comment Delete Event Filter";
    }

    @Override
    public Map<String, ? extends Object> getObjectProperties(final SocialEvent<?> arg0, final Resource arg1) {
        return Collections.<String, Object>emptyMap();
    }

    /* Ensure a custom extension is registered with a ranking lower than any existing implementation in the product. */
    @Override
    public int getRanking() {
        return this.ranking;
    }

    @Override
    public Map<String, ? extends Object> getTargetProperties(final SocialEvent<?> arg0, final Resource arg1) {
        return Collections.<String, Object>emptyMap();
    }

    @Override
    public String[] getStreamProviderPid() {
        return new String[]{"*"};
    }

}