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https://issues.apache.org/jira/browse/SLING-11504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574680#comment-17574680
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Michal Cukierman commented on SLING-11504:
------------------------------------------

I would proceed with the option number 2, I'll create a opt-in flag to make 
sling:resourceType optional. Do you [~cziegeler] [~kwin] have any preferences 
on what should be the flag name/behavior?
{quote}There are only two hard things in Computer Science: cache invalidation 
and naming things.
{quote}
*Option 1 (boolean flag):*

 - skipRTProp

 - onlyExplicitRTProp

 - useRTFallbackOnly

 
{code:java}
Sling-Bundle-Resources: 
/products;path:=/resources/products.json;propsJSON:=json;skipImplicitRT{code}
 

*Option 2 (also set default resource types):*

Or even go one step further and allow to declare default sling:resourceTypes 
for files/folders

 - defaultFolderRT=bundle/resource/folder

 

 - defaultFileRT=bundle/resource/file

And if the defaultFolderRT or defaultFileRT is set, we skip setting 
sling:resourceType property and depend only on getResourceType method?

So we would use:
{code:java}
Sling-Bundle-Resources: 
/products;path:=/resources/products.json;propsJSON:=json;defaultFolderRT=bundle/resource/folder;defaultFileRT=bundle/resource/file{code}
 

 

 

> BundleResource fallback sling:resourceType should be consistent with 
> JcrNodeResource
> ------------------------------------------------------------------------------------
>
>                 Key: SLING-11504
>                 URL: https://issues.apache.org/jira/browse/SLING-11504
>             Project: Sling
>          Issue Type: Improvement
>    Affects Versions: Bundle Resource 2.3.4
>            Reporter: Michal Cukierman
>            Priority: Minor
>         Attachments: Screenshot 2022-07-29 at 17.35.04.png, 
> image-2022-07-29-16-47-41-320.png
>
>
> *Background:*
> We work on Sling based CMS - 
> [https://www.websight.io|https://www.websight.io/] . One of our current goals 
> is to move /apps and /libs folders into bundle resources and get rid of JCR 
> based sling scripting and configurations (JCR Installer). This is an 
> alternative approach to CompositeNodeStore usage in order to support 
> containerized environments, blue-green deployments, and separation of code, 
> configuration, and data.
> To achieve this, we move components (and dialogs) definitions from JCR into 
> bundles and make them work with the same APIs (like Sling Resource Merger).
>  
> *The problem:*
> JcrNodeResource and BundleResource use different mechanisms for calculating 
> fallback sling:resourceType
>  * In JCR, Resource.getResourceType method is used to calculate resourceType 
> if no explicit property is found in the repository. See 
> [https://github.com/apache/sling-org-apache-sling-jcr-resource/blob/72c105d67adc58ef1f4d43de78815fdcebb290b5/src/main/java/org/apache/sling/jcr/resource/internal/helper/jcr/JcrItemResource.java#L120]]
>  * In Bundles, sling:resourceType is always set in the constructor and later 
> overwritten by the JSON properties, if available. See: 
> |[https://github.com/apache/sling-org-apache-sling-bundleresource-impl/blob/master/src/main/java/org/apache/sling/bundleresource/impl/BundleResource.java#L91]
> It results in a different contract, in particular, it’s impossible to declare 
> BundleResource with no sling:resorurceType property. The result can be 
> observed in the following Groovy Script execution, where both nodes have no 
> sling:resourceTypes declared:
> !image-2022-07-29-16-47-41-320.png|width=751,height=545!
> Incompatible BundleResource and JCRNodeResource contracts requires 
> workarounds in multiple APIs (our internal APIs / SlingResource Merger API) 
> or to do workarounds at the data level.
>  
> *Proposed solution:*
> I can reimplement BundleResource, so that sling:resourceType is calculated in 
> the getter. This will result in a valid getResourceType() method contract 
> with the possibility of having null sling:resourceType resource property.



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