Event handler is not working in aem cloud dev server

[ShikhaSo3]

Hi, 

I am trying to start a workflow on the basis of asset creation event in dam. It is working perfectly fine in AEM cloud local server but post deployment it is not working , though when i am starting the workfloww from workflow model , workflow is working fine . i am attching the code here, what can be the issue. Please guide me on this. What can be the alternative.

@AnkurAhlawat @arunpatidar  @Erika_Antkowiak 

package com.disney.core.listeners;

import com.day.cq.dam.api.DamEvent;
import com.day.cq.workflow.WorkflowException;
import com.day.cq.workflow.WorkflowService;
import com.day.cq.workflow.WorkflowSession;
import com.day.cq.workflow.exec.WorkflowData;
import com.day.cq.workflow.model.WorkflowModel;
import org.apache.sling.api.resource.LoginException;
import org.apache.sling.api.resource.Resource;
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.osgi.service.event.Event;
import org.osgi.service.event.EventConstants;
import org.osgi.service.event.EventHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jcr.Session;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

@Component(

        service = EventHandler.class,
        property = {
                EventConstants.EVENT_TOPIC + "=" + DamEvent.EVENT_TOPIC,
                EventConstants.EVENT_FILTER + "=(type=ASSET_CREATED)"
        },
        immediate = true
)
public class AssetVersionListener implements EventHandler {
    private static final String DISNEY_WORKFLOW_ADMIN = "disney-workflow-admin";

    @Reference
    private ResourceResolverFactory resourceResolverFactory;

    private final Logger log = LoggerFactory.getLogger(AssetVersionListener.class);
    @Reference
    private WorkflowService workflowService;

    @Override
    public void handleEvent(Event event) {
        log.info("Inside Event Handler");
        try {
            Map<String, Object> authInfo = new HashMap<>();
            authInfo.put(ResourceResolverFactory.SUBSERVICE, DISNEY_WORKFLOW_ADMIN);
            ResourceResolver resolver = resourceResolverFactory.getServiceResourceResolver(authInfo);
            String assetPath = (String) event.getProperty("assetPath");
            Resource assetResource = resolver.getResource(assetPath);
            if (Objects.nonNull(assetResource)) {
                if (fileNameMatcher(assetResource.getName())) {
                    WorkflowSession wfSession = workflowService.getWorkflowSession(resolver.adaptTo(Session.class));
                    if (Objects.nonNull(wfSession)) {
                        WorkflowModel wfModel = wfSession.getModel("/var/workflow/models/asset-version-notificaion");
                        if (Objects.nonNull(wfModel)) {
                            WorkflowData workflowData = wfSession.newWorkflowData("JCR_PATH", assetPath);
                            if (Objects.nonNull(workflowData)) {
                                wfSession.startWorkflow(wfModel, workflowData);
                            }
                        }
                    }
                }
            }
        } catch (WorkflowException | LoginException e) {
            log.error("error in handle event method", e);
        }
    }

    // function to match pattern in file name
    public static boolean fileNameMatcher(String fileName) {
        Pattern pattern = Pattern.compile("^(.*?)(?:_v_|_)(\\d+)\\.(\\w+)$"); //any filename following the _v_# or _# pattern
        Matcher matcher = pattern.matcher(fileName);
        return matcher.matches();
    }
}

[narendragandhi · Accepted solution]

Hi @ShikhaSo3 

Have you tried using Workflow launcher ? You can refer this article - https://www.techiearchive.com/configure-launcher-with-aem-workflow-aemaacs/ for how to configure workflow launchers.

Hope this helps!

Thanks

Narendra

[Anil_Chennapragada]

Please try using Post processing workflows for AEM as a Cloud Service

https://experience-aem.blogspot.com/2021/06/aem-cloud-service-asset-processing-profile-post-processi...

[kautuk_sahni]

@ShikhaSo3 Did you find the suggestions helpful? Please let us know if you need more information. If a response worked, kindly mark it as correct for posterity; alternatively, if you found a solution yourself, we’d appreciate it if you could share it with the community. Thank you!

[abhishekanand_]

Hi @ShikhaSo3 

AEMaaCS has optimized event handling, and DamEvent.EVENT_TOPIC may not behave consistently, switch to ResourceChangeListener for better AEMaaCS event handling also ensure the model exists at this path in Cloud.

try WorkflowModel wfModel = wfSession.getModel("/conf/global/settings/workflow/models/asset-version-notification");

The service user (disney-workflow-admin) might not have sufficient permissions in the Cloud environment, check the service user is mapped in the system/console/confMgr under Apache Sling Service User Mapper Service Amendment. 

last thing check assetPath is not null

Hope this helps!