[jira] [Commented] (SOLR-15141) Investigate V2RequestSupport's role in SolrJ's V2 API support

["Jason Gerlowski (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-15141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17435108#comment-17435108 ] 

Jason Gerlowski commented on SOLR-15141:
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Despite a good bit of brainstorming, I haven't found a good way to support v1 and v2 simultanteously in SolrJ without a V2RequestSupport-like interface.  The option mentioned above of keeping the interface but modifying it to work more naturally with POJO/annotation-based APIs is looking increasingly likely.

(I've tweaked the title of this JIRA to reflect my own uncertainty here.)

> Investigate V2RequestSupport's role in SolrJ's V2 API support
> -------------------------------------------------------------
>
>                 Key: SOLR-15141
>                 URL: https://issues.apache.org/jira/browse/SOLR-15141
>             Project: Solr
>          Issue Type: Task
>          Components: v2 API
>    Affects Versions: 8.8, main (9.0)
>            Reporter: Jason Gerlowski
>            Priority: Minor
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> The V2RequestSupport interface was the original plan for building support for the v2 API into SolrJ's existing request objects.  It relies on {{CollectionApiMapping.Meta}} to convert v1 request objects into instances of the generic V2Request class.
> This worked well as the V2 APIs were originally conceived, but has developed a few issues over time.
> # V2RequestSupport's reliance on the {{Meta}} mapping class means that it only works with jsonspec-based v2 APIs and not the annotated-POJOs that the community intends to use going forward for defining V2 APIs.
> # It requires users to create request objects that rely on v1 APIs and concepts. e.g. there is no "Collection Admin" path in v2 APIs. 
> # Usage of the interface never took off.  It's only currently used by CollectionAdminRequest.  So it's somewhat abandoned already.
> We should deprecate V2RequestSupport in 8.x and plan to remove it in 9.0.  In parallel (and in different JIRAs), we can work on adding v2 support to SolrJ one SolrRequest class at a time. (Classes that expose v2-compatible abstractions can be switched over to v2 implementations under-the-hood.  Classes that don't (e.g. CollectionAdminRequest) can be deprecated and replaced by a more v2-friendly SolrRequest implementation.)



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