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I use Lucene to index user list in my application.
How can I sort the user search result by recent activity
Example:
Anna has just sent an email to Peter.
So when Anna Search with character “P”
Peter must be have high rank than Pill or Peo.
You will need to constantly update the index with the recent activity (which unfortunately involves dropping & adding documents — Lucene does not have an “update” action for documents).