(Paraphrased from Joel's idea/suggestions in the comments of
SOLR-7535, users can now index documents/tuples using an UpdateStream. However, there's no way currently using the Streaming API to force a commit on the collection that received these updates.
The purpose of this ticket is to add a CommitStream, which can be used to trigger commit(s) on a given collection.
The proposed usage/behavior would look a little bit like:
1.) CommitStream has a positional collection parameter, to indicate which collection to commit on. (Alternatively, it could recurse through children() nodes until it finds the UpdateStream, and then retrieve the collection from the UpdateStream).
2.) CommitStream forwards all tuples received by an underlying, wrapped stream.
3.) CommitStream commits when the underlying stream emits its EOF tuple. (Alternatively, it could commit every X tuples, based on a parameter).