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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.

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Level 7

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

 

  • ACreate a field of type ServiceUserMapped and annotate it with @reference.
  • BWait 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.
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1 Accepted Solution

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Correct answer by
Level 4

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

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4 Replies

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Community Advisor

Hi @JakeCham 

The correct answer is: C

 

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



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Correct answer by
Level 4

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

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Administrator

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