Contract needed by Hibernate Search to batch changes per transaction.
Used to flush and commit asynchronous and other pending operations on the Indexes.
Represent a Serializable Lucene unit work WARNING: This class aims to be serializable and passed in an asynchronous way across VMs any non backward compatible serialization change should be done with great care and publically announced.
A unit of work triggering an optimize operation.
A unit of work used to purge an entire index.
Carries a Lucene update operation from the engine to the backend
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