Chris Hostetter wrote:
THe only usefull callback/listner abstractions i can think of are when you want to know if someone has finished with a set of changes -- wether that change is adding one document, deleting one document, or adding/deleting a whole bunch of documents isn't really relevent, you still want to know that a complete "set" has been modified, so you aren't constantly flushing caches or reopening IndexReaders everytime a single document is added.
Speaking of listeners: Would be great if there was a way to know when optimize() changes a document ID. Storing document IDs externally is the only way to merge Lucene queries with queries in a relational database efficiently (as far as I know), but the inability to track document ID changes complicates things a bit...
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