Q ) A custom AEM application contains a service component that needs to access the JCR repository within the activate method. The activate method uses ResourceResolverFactory.getServiceResourceResolver("¦) without specifying a sub service name.

[JakeCham]

What should be done to make sure the user service mapping for the service component is available?

• A. Create a field of type ServiceUserMapped and annotate it with @reference.
• B. Wait for the service ServiceUserMapper via BundleContext.getServiceReference().
• C. Create a field of type ServiceUserMapped and annotate it with @reference using ReferencePolicy.DYNAMIC.
• D. Create a field of type ServiceUserMapper and annotate it with @reference using ReferencePolicy.STATIC.
•  

[Madhur-Madan]

Hi @JakeCham,

Option A is correct 
http://www.sgaemsolutions.com/2017/10/sling-service-authentication-in-aem-63.html#:~:text=of%20Servi...

[Raja_Reddy]

Hi @JakeCham 

The correct answer is: C

C. Create a field of type ServiceUserMapped and annotate it with @reference using ReferencePolicy.DYNAMIC.

[Jvenkat · Accepted solution]

Hi @JakeCham 

Correct Ans is

D. Create a field of type ServiceUserMapper and annotate it with @reference using ReferencePolicy.STATIC.

The ServiceUserMapper service is a core Apache Sling service and will typically be available before any custom services that depend on it. Thus, the OSGi references to this service should be satisfied with a static reference policy. The @Reference annotation with ReferencePolicy.STATIC is used to inject a reference to the necessary service, in this case, ServiceUserMapper. It means that the reference to the ServiceUserMapper OSGi service will be injected when the component is activated.

Thanks,

Venkat

[kautuk_sahni]

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