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G
goyalkritika
Level 4
February 7, 2023
Solved

Unsatisfied (reference) Error for a utility class

  • February 7, 2023
  • 4 replies
  • 2245 views

I have written a resource type servlet and used a utility class in it.

My core bundle state is active. But, the servlet is showing 'Unsatisfied (reference)' error. 

When I checked for the particular servlet, it is showing me the attached issue.

Please explain what is the exact issue and how to get it resolved.

 

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Best answer by DEBAL_DAS

We use @3214626 annotation to inject OSGi service.

 

You can define your Util class as similar to https://github.com/adobe/aem-core-wcm-components/blob/main/bundles/core/src/main/java/com/adobe/cq/wcm/core/components/internal/Utils.java

 

Then call the relevant static method using

Utils.methodname("") in your servlet.

4 replies

DEBAL_DAS
DEBAL_DAS
New Member
February 7, 2023

Is GetUserProfileUtils an OSGi service? How did you call GetUserProfileUtils in your servlet?

Debal Das, Senior AEM Consultant
    G
    goyalkritikaAuthor
    Level 4
    February 8, 2023

    It is not an OSGi service. A plain Util class that I'm calling using @3214626 annotation.

      DEBAL_DAS
      DEBAL_DASAccepted solution
      New Member
      February 8, 2023

      We use @3214626 annotation to inject OSGi service.

       

      You can define your Util class as similar to https://github.com/adobe/aem-core-wcm-components/blob/main/bundles/core/src/main/java/com/adobe/cq/wcm/core/components/internal/Utils.java

       

      Then call the relevant static method using

      Utils.methodname("") in your servlet.

      Debal Das, Senior AEM Consultant
        Peter_Puzanovs
        Community Advisor
        Peter_PuzanovsCommunity Advisor
        Community Advisor
        February 7, 2023

        Hi Goyal,

         

        This normally means that service you referenced from your service is not available in OSGi Service Registry.

         

        Regards,

        Peter

          BrianKasingli
          Community Advisor and Adobe Champion
          BrianKasingliCommunity Advisor and Adobe Champion
          Community Advisor and Adobe Champion
          February 8, 2023

          It might be because the UtilityService that you are trying to use does not exist in the OSGI Apache Felix environment. What's your implementation of the servlet?

            BrianKasingli
            Community Advisor and Adobe Champion
            BrianKasingliCommunity Advisor and Adobe Champion
            Community Advisor and Adobe Champion
            February 8, 2023

            You typically wouldn’t use @3214626 for the Utils class, because it’s reserved for dependency injection, injecting AEM services, as such.

             

            If your utils class is created with static methods (as you should), all you would need to do is import the utils class into your project, and call:

             

            Utils.getString(“”)

             

            if you’d like to be a better backend developer, I would recommend you to download some linting libraries for your IDE like sonarLint. This will dramatically improved your code quality, and also enables learning opportunities as well. 

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