OSGi-Ereignisse für Communities-Komponenten

Übersicht

Wenn Mitglieder mit Communities-Funktionen interagieren, werden OSGi-Ereignisse gesendet, die asynchrone Listener wie Benachrichtigungen oder Gamification (Scoring und Badging) in Trigger setzen können.

Die SocialEvent -Instanz zeichnet die Ereignisse als actionsdie für topic. Das SocialEvent enthält eine Methode zum Zurückgeben einer verbmit der Aktion verknüpft ist. Es gibt eine n-1 Beziehung actionsund verbs.

Die folgenden Tabellen beschreiben für die in der Version bereitgestellten Communities-Komponenten die verbsfür jeden topicverfügbar.

Themen und Verben

Kalenderkomponente
SocialEvent topic= com/adobe/cq/social/calendar

Kommentarkomponente
SocialEvent topic= com/adobe/cq/social/comment

Dateibibliothekskomponente
SocialEvent topic= com/adobe/cq/social/fileLibrary

Forumkomponente
SocialEvent topic= com/adobe/cq/social/forum

Journalkomponente
SocialEvent topic= com/adobe/cq/social/journal

QnA-Komponente
SocialEvent topic = com/adobe/cq/social/qna

Überprüfungskomponente
SocialEvent topic= com/adobe/cq/social/review

Bewertungskomponente
SocialEvent topic= com/adobe/cq/social/tally

Abstimmungskomponente
SocialEvent topic= com/adobe/cq/social/tally

Moderationsfähige Komponenten
SocialEvent topic= com/adobe/cq/social/moderation

Ereignisse für benutzerdefinierte Komponenten

Bei einer benutzerdefinierten Komponente muss die Abstrakte SocialEvent-Klasse muss erweitert werden, um die Ereignisse der Komponente als actionsdie für topic.

Das benutzerspezifische Ereignis überschreibt die -Methode getVerb() , damit verbwird für jeden action. Die verb für eine Aktion zurückgegeben wird, kann eine häufig verwendete Aktion sein (z. B. POST) oder einer für die Komponente spezialisierten Komponente (z. B. ADD RATING). Es gibt eine n-1 Beziehung actionsund verbs.

Pseudo-Code für benutzerspezifisches Komponentenereignis

org.osgi.service.event.Event;
com.adobe.cq.social.scf.core.SocialEvent;
com.adobe.granite.activitystreams.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");
            }
        }
    }

}

Beispiel für EventListener zum Filtern von Aktivitäts-Stream-Daten

Es ist möglich, Ereignisse zu überwachen, um zu ändern, was im Aktivitäts-Stream angezeigt wird.

Im folgenden Pseudo-Codebeispiel werden DELETE-Ereignisse für Kommentar-Komponenten aus dem Aktivitäts-Stream entfernt.

Pseudocode für EventListener

Erfordert neueste Feature Pack.

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[]{"*"};
    }

}