[jira] [Created] (SOLR-10721) Provide a way to know when Core Discovery is finished and when all async cores are done loading

["Erick Erickson (JIRA)" <ji...@apache.org>]

Erick Erickson created SOLR-10721:
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             Summary: Provide a way to know when Core Discovery is finished and when all async cores are done loading
                 Key: SOLR-10721
                 URL: https://issues.apache.org/jira/browse/SOLR-10721
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Erick Erickson
            Assignee: Erick Erickson
            Priority: Minor


Custom transient core implementations could benefit from knowing two things:
1> that core discovery is over
2> that all cores that are going to be loaded have been loaded, i.e. all loadOnStartup cores are done.

It should be trivial to add a method to CoreContainer like "isLoaded" that would answer the first question since you can't get past the load() method without all the cores being discovered. I think this is a more generally useful bit of information than just core discovery is done.

As for the second, that too seems trivial, just add a method to CoreContainer that returns the number of entries in SolrCores.currentlyLoadingCores.

I'll add this in a few days unless there are objections.



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