manipulate node content when publishing in aemaacs

[AliSyed1]

i need to manipulate node content programatically after author click quick publish button and send changed content to replication agent for activation. 

that is i need to filter put some paths from the published content and  send filtered content to replication agent for pubishing.

[EstebanBustamante]

Hi,

I recommend that you go through this article, which explains replication quite well: Replication Under the Hood. Beyond that, I think you should look into the Preprocessor interface. Here are some examples:

• Sample Replication Preprocessor
• AEM Replication Preprocessor

Hope this helps!

[AliSyed1]

I have read it but I want it to work on quick publish button only and not for manage publication.

[AliSyed1]

plz review this code and help me where am i doing it wrong.

package com.macnicagwi.core.listeners;

import javax.jcr.Node;

import javax.jcr.PathNotFoundException;

import javax.jcr.RepositoryException;

import javax.jcr.Session;

import org.apache.sling.api.resource.PersistenceException;

import org.apache.sling.api.resource.ResourceResolver;

import org.apache.sling.api.resource.ResourceResolverFactory;

import org.osgi.service.component.annotations.Component;

import org.osgi.service.component.annotations.Reference;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.day.cq.replication.Preprocessor;

import com.day.cq.replication.ReplicationAction;

import com.day.cq.replication.ReplicationContentFilter;

import com.day.cq.replication.ReplicationException;

import com.day.cq.replication.ReplicationOptions;

import com.day.cq.replication.Replicator;

import com.macnicagwi.core.constants.MacnicaCoreConstants;

import com.macnicagwi.core.utils.MacnicaCoreUtils;

@component(service = Preprocessor.class, immediate = true)

public class OnPublishReplicationEventHandler implements Preprocessor {

Logger logger = LoggerFactory.getLogger(getClass());

@reference

ResourceResolverFactory factory;

@Override

public void preprocess(ReplicationAction action, ReplicationOptions options) throws ReplicationException {

// TODO Auto-generated method stub

logger.info("reached");

String id = action.getUserId();

String[] paths = action.getPaths();

ReplicationFactory factory = new ReplicationFactory();

ReplicationContentFilter filter = factory.createFilter(action);

ResourceResolver resolver = MacnicaCoreUtils.getResourceResolver(this.factory,

MacnicaCoreConstants.MACNICA_SUB_SERVICE);

Session session = resolver.adaptTo(Session.class);

for (String path : paths) {

try {

Node node =session.getNode(path);

filter.accepts(node);

resolver.commit();

} catch (PathNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (RepositoryException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (PersistenceException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

@component(immediate = true,factory = "ReplicationFactory",service = ReplicationContentFilterFactory.class)

public class ReplicationFactory implements ReplicationContentFilterFactory {

@Override

public ReplicationContentFilter createFilter(ReplicationAction action) {

// TODO Auto-generated method stub

ReplicationFilter filter = new ReplicationFilter();

return filter;

}

}

@component(immediate = true)

public class ReplicationFilter implements ReplicationContentFilter {

@Override

public boolean accepts(Node node) {

// TODO Auto-generated method stub

return false;

}

@Override

public boolean accepts(Property property) {

// TODO Auto-generated method stub

return false;

}

@Override

public boolean allowsDescent(Node node) {

// TODO Auto-generated method stub

return false;

}

@Override

public List String getFilteredPaths() {

// TODO Auto-generated method stub

return null;

}

}

[AliSyed1]

removed<> as html problem is raised when writing

[pulkitvashisth]

Hi @AliSyed1 

What you can do for this is create a Sling Event Handler and bind it to replication event on publish.

This will get called every time a page is replicated to the publisher.
Here you can write the logic to modify the page replicated as you please:

Here is sample code of how you can register such a Handler on AEM Publish instance.

@Component(service = EventHandler.class,
        immediate = true,
        property = {
                Constants.SERVICE_DESCRIPTION + "=Listener on page replication",
                EventConstants.EVENT_TOPIC + "=" + ReplicationEvent.EVENT_TOPIC
        })
public class OnPublishReplicationEventHandler implements EventHandler {
@Override
    public void handleEvent(final Event event) {
      //write your logic here
    }
}

[AliSyed1]

is n't it triggers when page is published?i want to change content when publish is clicked.

[Jörg_Hoh · Accepted solution]

I don't think that the replication API allows you to modify content (that means: changing the values of properties and/or add/remove nodes) which is then sent only to the publish, but which is not persistet on the authoring instance.

[AliSyed1]

yes but we can prevent some nodes or properties from activating using replication content filter.

[kautuk_sahni]

@AliSyed1 Did you find the suggestions helpful? Please let us know if you require more information. Otherwise, please mark the answer as correct for posterity. If you've discovered a solution yourself, we would appreciate it if you could share it with the community. Thank you!