A {@link IndexDeletionPolicy} that wraps around any other {@link IndexDeletionPolicy} and adds the ability to hold and later release a single "snapshot" of an index. While the snapshot is held, the {@link IndexWriter} will not remove any files associated with it even if the index is otherwise being actively, arbitrarily changed. Because we wrap another arbitrary {@link IndexDeletionPolicy}, this gives you the freedom to continue using whatever {@link IndexDeletionPolicy} you would normally want to use with your index. Note that you can re-use a single instance of SnapshotDeletionPolicy across multiple writers as long as they are against the same index Directory. Any snapshot held when a writer is closed will "survive" when the next writer is opened.

WARNING: This API is new and experimental and may suddnely changendex.

For a list of all members of this type, see SnapshotDeletionPolicy Members.

System.Object
   Lucene.Net.Index.SnapshotDeletionPolicy

Thread Safety

Public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Instance members are not guaranteed to be thread-safe.

Requirements

Namespace: Lucene.Net.Index

Assembly: Lucene.Net (in Lucene.Net.dll)

See Also

SnapshotDeletionPolicy Members | Lucene.Net.Index Namespace

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