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Nitesh-Chavan
Nitesh-Chavan
Level 3
June 6, 2025

Issue with a custom built servlet

  • June 6, 2025
  • 5 replies
  • 880 views

Hi, 

Good Day!

I have a question, in our AEM as a Managed Service instance we have 2 Create Asset Servlet. which are interfering with each other. Basically if both of the servlets are in running condition, we are not able to upload any asset.

 

AEM default Asset upload servlet ----> com.day.cq.dam.core.impl.servlet.CreateAssetServlet

Custom built servlet -----> com.custombuilt.aem.servlets.CreateAssetServlet

 

The mentioned custom built servlet for asset upload is interfering with the default servlet. We have to disable it whenever our author server is getting restarted. 

For some reason we cannot remove the mentioned servlet in a new AEM build, is there a way to permanently disable the custom built servlet without removing it.

Thank You in advance.

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5 replies

TarunKumar
Community Advisor
TarunKumarCommunity Advisor
Community Advisor
June 6, 2025

HI @nitesh-chavan ,

 It seems you want to trigger the custom servlet when your instance is completely up, AEM is built on OSGi, and you can listen to lifecycle events to determine when the instance is active. Implement an OSGi component that listens for the FrameworkEvent.STARTED event, which indicates that the OSGi framework has started.

Sample code:

import org.osgi.framework.BundleContext; import org.osgi.framework.FrameworkEvent; import org.osgi.framework.FrameworkListener; import org.osgi.service.component.annotations.Activate; import org.osgi.service.component.annotations.Component; @Component(immediate = true) public class InstanceActiveListener implements FrameworkListener { @Activate protected void activate(BundleContext bundleContext) { bundleContext.addFrameworkListener(this); } @Override public void frameworkEvent(FrameworkEvent event) { if (event.getType() == FrameworkEvent.STARTED) { // Trigger your servlet logic here triggerServlet(); } } private void triggerServlet() { // Logic to trigger the servlet } }

 

 

-Tarun

    arunpatidar
    Community Advisor
    arunpatidarCommunity Advisor
    Community Advisor
    June 6, 2025

    Hi @nitesh-chavan 

    Can you share the use case of Custom built servlet? When is it needed? Why It can't be deleted? Is it in use somewhere?

    Arun Patidar
      lukasz-m
      Community Advisor
      lukasz-mCommunity Advisor
      Community Advisor
      June 6, 2025

      Hi @nitesh-chavan,

      You can consider to use OSGi Component Disabler from ACS Commons, to disable CreateAssetServlet or any other OSGi component.

      In case you can not use ACS Commons, you can implement similar mechanism in your project base on ACS Commons implementation:

        Nitesh-Chavan
        Nitesh-ChavanAuthor
        Level 3
        June 9, 2025

        We have ACS Commons in our environment, But I was not aware that we can disable the OSGi Component using it.

        I will check these blog, and I will get back to you if I have any questions. 

        Thank You.

        aanchal-sikka
        Community Advisor
        aanchal-sikkaCommunity Advisor
        Community Advisor
        June 7, 2025

        @nitesh-chavan 

         

        Define a lower service ranking for the Custom Servlet. It would assure that the OOTB one is prioritized by OSGi . Example:

         

        @Component(service = Servlet.class,
        property = { Constants.SERVICE_DESCRIPTION + "=Custom Asset Create servlet", Constants.SERVICE_RANKING+ ":Integer=-700"
        "sling.servlet.methods=" + HttpConstants.METHOD_GET, "sling.servlet.paths=" + "/bin/createpage" })

         

        If you want to learn more about Service Ranking, visit https://sling.apache.org/documentation/the-sling-engine/servlets.html#servlet-resolution-order-1

        Aanchal Sikka
          Nitesh-Chavan
          Nitesh-ChavanAuthor
          Level 3
          June 9, 2025

          I will check service ranking blog, and I will get back to you if I have any questions. 

          kautuk_sahni
          Community Manager
          kautuk_sahniCommunity Manager
          Community Manager
          June 23, 2025

          @nitesh-chavan Did you find the suggestions helpful? If you need more information, please let us know. If a response resolved your issue, kindly mark it as correct to help others in the future. Alternatively, if you discovered a solution on your own, we'd appreciate it if you could share it with the community. Thank you.

          Kautuk Sahni
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