AEM 6.5: How do I remove an event from page?

@magicr Please check if there is any launcher configured for your page/hierarchy
<server>/libs/cq/workflow/admin/console/content/launchers.html

Hi,

The link works, here is the response from page

Hi Vishwanath,

Basically when you delete the pages/nodes or assets, the event listener must trigger the events.

Look into this article which discuss of your use case: 

https://helpx.adobe.com/experience-manager/using/events.html
https://helpx.adobe.com/experience-manager/kb/ReplicationListener.html

Thanks,
Ratna Kumar.

@magicr Removing the event from the class "com.day.cq.wcm.api.PageEvent" will not be easy as could be that there are many things interlinked to this event.

Currently in AEM the Page event is registered with the topic "com/day/cq/wcm/core/page" and all the events i.e.

PROPERTY_MODIFICATIONS
PROPERTY_APPLICATION
PROPERTY_DISTRIBUTE

all are getting triggered from the single topic.

And the event PROPERTY_MODIFICATIONS consists of the below list 

    CREATED("PageCreated"),
    MODIFIED("PageModified"),
    MOVED("PageMoved"),
    DELETED("PageDeleted"),
    VERSION_CREATED("VersionCreated"),
    RESTORED("PageRestored"),
    ROLLEDOUT("PageRolledOut"),
    VALID("PageValid"),
    INVALID("PageInvalid");

And this is a list rather than some OSGi configuration which could be changed easily. So ideally removing the event a Page is not a feasible solution.

Thanks 

Hi @magicr,

If you are trying to trigger listeners on DELETE/REMOVED of Asset or Pages with EventHandler(org.osgi.service.event.EventHandler) that may not work properly because some of the EVENT_TOPIC( like TOPIC_RESOURCE_REMOVED, ) are deprecated and suggested to use ResourceChangeListener- https://sling.apache.org/apidocs/sling9/org/apache/sling/api/resource/observation/ResourceChangeListener.html 

Check out the deprecation here-  https://sling.apache.org/apidocs/sling9/org/apache/sling/api/SlingConstants.html#TOPIC_RESOURCE_REMOVED 

You can use ResourceChangeListener to trigger a listener on Page or Asset Deletion as below. It will work for all cases(Tested it, working fine for me):

• Deleting Assets from the DAM
• Deleting Pages from Sites
• Deleting Assets or Pages from CRX/DE ( It will trigger when you will click on Save All)

@Component(service = ResourceChangeListener.class, property = {
        ResourceChangeListener.PATHS + "=" + "/content",
        ResourceChangeListener.CHANGES + "=" + "REMOVED"
}
)
public class RemovedResourceChangeListener implements ResourceChangeListener {
    public static final Logger LOGGER = LoggerFactory.getLogger(RemovedResourceChangeListener.class);

    @Override
    public void onChange(List<ResourceChange> list) {
        list.forEach((change) -> {
            LOGGER.info(change.getPath());
            LOGGER.info(change.getType().toString());
            //Custom Code Implementation
        });
    }
}

Hope this could help you!!!

Regards,

Shiv