AEM 6.4 upgrade @reference does not work in a workflow

Anyone?

Hi,

Which annotation are you using Felix or Osgi?

How did you created your service? Are you able to see your service at http://localhost:4502/system/console/services

I created a Demo Process and shared with you which include Reference to my custom service HandleSession and I am able to get the Service reference inside workflow process.

Thanks

Arun

I used the OSGI, yes i see the service as well. Sent the code over, its a custom service and not OOTB so i am not sure if that affects anything.

I took off the @Reference annotation and just instantiated the class and it worked fine. i wonder why the annotation would not work within a workflow.

I do see errors as well, could this be related?

[com.adobe.granite.workflow.core.job.ExternalProcessPollingHandler(917)] : Could not get service from ref [com.adobe.granite.workflow.exec.WorkflowProcess]

15.06.2018 20:10:15.785 *WARN* [FelixStartLevel] com.adobe.granite.workflow.core bundle com.adobe.granite.workflow.core:2.0.168 (275)[com.adobe.granite.workflow.core.job.ExternalProcessPollingHandler(917)] : DependencyManager : invokeUnbindMethod : Service not available from service registry for ServiceReference [com.adobe.granite.workflow.exec.WorkflowProcess] for reference WorkflowProcess

15.06.2018 20:10:15.785 *ERROR* [FelixStartLevel] com.test.core bundle com.test.core:1.5.10.SNAPSHOT (1033)[com.test.core.workflows.BaseWorkflowProcess(3632)] :  Error during instantiation of the implementation object: null

15.06.2018 20:10:15.785 *ERROR* [FelixDispatchQueue] com.adobe.granite.workflow.core FrameworkEvent ERROR (org.osgi.framework.ServiceException: Service factory returned null. (Component: com.test.core.workflows.BaseWorkflowProcess (3632)))

org.osgi.framework.ServiceException: Service factory returned null. (Component: com.test.core.workflows.BaseWorkflowProcess (3632))

I also tried @Reference ResourceResolverFactory rrf; and it appears to be null as well, so curious if @reference throws null for some unknown reason>

Hi,

Check below article with same kind of issue, something may be wrong with service

Could not get service from ref [javax.servlet.Servlet, javax.servlet.ServletConfig, java.io.Serializable]

Could you please check the sample code to Create Service WorkflowProcess and invoked using @Reference inside Process Step

aem63app-repo/demo at master · arunpatidar02/aem63app-repo · GitHub

Thanks

Arun

Will be logging a ticket with Adobe,

Created classes as you've shared and weird issues were noted

1. With @reference annotation, custom workflow process  (java)step did not appear in the dropdown  for the workflow

2.Without @Reference annotation, the process step java class was visible.

What Annotations are you using - DS Annotations or Felix Src annotations.

Post some of your code - including your import statements - that will tell us exactly what you are trying to do. I do not believe using @Reference ins a custom workflow step has an issue.

I got this to work with Maven Arch 13 and i have also created a nice video. Scott's Digital Community: Learn how to use DS Annotations and Inject a custom AEM Service into a Custom Workflow Step

Sure thanks i believe i used maven arch 13, but i am attaching the code here

package com.test.core.workflows.general;

public interface DemoWFService {

public String showMessage(String msg);

}

------------------------------------

package com.test.core.workflows.general;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class DemoWFServiceImpl implements DemoWFService {

protected final Logger log = LoggerFactory.getLogger(this.getClass());

String PrefixMessage = "Service Invoked by Workflow -- ";

@Override

public String showMessage(String msg) {

return PrefixMessage+msg;

}

}

------------------------

package com.test.core.workflows.general;

import org.osgi.framework.Constants;

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

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

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import com.adobe.granite.workflow.WorkflowException;

import com.adobe.granite.workflow.WorkflowSession;

import com.adobe.granite.workflow.exec.WorkItem;

import com.adobe.granite.workflow.exec.WorkflowProcess;

import com.adobe.granite.workflow.metadata.MetaDataMap;

@Component(immediate = false,service= WorkflowProcess.class, property={

        Constants.SERVICE_DESCRIPTION + "=Test.",

        Constants.SERVICE_VENDOR + "=Test",

        "process.label" + "=Test"

})

public class WFProcessStep implements WorkflowProcess {

@Reference

private DemoWFService ws;

    private static final Logger logger = LoggerFactory.getLogger(WFProcessStep.class);

@Override

public void execute(WorkItem arg0, WorkflowSession arg1, MetaDataMap arg2) throws WorkflowException {

    logger.info("********************* WF");

    logger.info("wfff"+ws.showMessage("text"));

}

}

See my video - it works