Replication listener for DAM assets

[#1]

Hi,

I'm working on this replication listener to capture events on my publish instance whenever DAM assets are published in our author instance.

This replication listener is used to filter paths and if matches our desired filters, it will also trigger replication to other publisher.

Basically, our setup is:

When activating a cq:page:
AUTHORING (author) ==> STAGING (publish).

Then activate from STAGING (publish) ==> LIVE (publish)

When activating/deactivating a dam:Asset

AUTHOR ==> STAGING

AUTHOR ==> LIVE

Sample code below:

@Component(

        label = "Replication Event Listener",

        description = "Listen to replication events and relay it to publisher if necessary.",

        metatype = false

)

@Properties({

    // Scope the paths as tightly as possible based on your use-case.

    @Property(

            label = "Topic",

            description = "Event topic for replication",

            name = EventConstants.EVENT_TOPIC,

            value = ReplicationAction.EVENT_TOPIC

    )

})

@Service

public class ReplicationEventListener implements EventHandler {

     private Logger log = LoggerFactory.getLogger(this.getClass());

     @Override

    public void handleEvent(Event event) {

        String n[] = event.getPropertyNames();

        log.info("");

        log.info("Event occurred: {}", event.getProperty(WorkflowEvent.EVENT_TYPE));

        log.info("Event properties: ");

        for (String s : n) {

            log.info(s + " = " + event.getProperty(s));

        }

        action = ReplicationAction.fromEvent(event);

        if (action != null) {

            log.info("Replication action {} occured on {} ", action.getType().getName(), action.getPath());

        }

        log.info("");

    }

}

[#2 · Accepted solution]

Yes, It is writing logs.

I think I got it solved already. I have figured out that it is not triggering any replication action but only:

org/apache/sling/api/resource/Resource/ADDED

org/apache/sling/api/resource/Resource/CHANGED

org/apache/sling/api/resource/Resource/REMOVED

Here's my

@Properties({

    @Property(

        label = "Filter",

        description = "Event filter for replication",

        name = EventConstants.EVENT_FILTER,

        value = "(path=/content/dam/*)"

    ),

    @Property(

        label = "Topic",

        description = "Event topic for replication",

        name = EventConstants.EVENT_TOPIC,

        value = {

            SlingConstants.TOPIC_RESOURCE_ADDED,

            SlingConstants.TOPIC_RESOURCE_CHANGED,

            SlingConstants.TOPIC_RESOURCE_REMOVED

        }

    )

})

@Service

public class DamEventListener implements EventHandler {

     private Logger log = LoggerFactory.getLogger(this.getClass());

     @Override

     public void handleEvent(Event event) {

          String path = (String) event.getProperty(SlingConstances.PROPERTY_PATH);

          String topic = event.getTopic();

          log.info("PATH: {}", path);

          log.info("TOPIC: {}", topic);

     }

}

[#3]

Yeah, I actually used that logic when listening to the replication of our pages.

[#4]

We have an older AEM article that shows logic for a replication event handler too -- Adobe CQ Help | Creating Replication Event Handlers for Adobe Experience Manager

[#5]

Id your log messages being written to the log file?

[#6]

Moving this to the Assets topic!!