object EmptyCheckpointProvider extends CheckpointProvider
An implementation for CheckpointProvider which could be used to represent a scenario when checkpoint doesn't exist. This helps us simplify the code by making LogSegment.checkpointProvider as non-optional.
The CheckpointProvider.isEmpty method returns true for EmptyCheckpointProvider. Also version is returned as -1. For a real checkpoint, this will be returned true and version will be >= 0.
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def
allActionsFileIndexes(): Seq[DeltaLogFileIndex]
List of different file indexes which could help derive full state-reconstruction for the checkpoint.
List of different file indexes which could help derive full state-reconstruction for the checkpoint.
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- EmptyCheckpointProvider → CheckpointProvider
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checkpointPolicy: Option[Policy]
The type of checkpoint (V2 vs Classic).
The type of checkpoint (V2 vs Classic). This will be None when no checkpoint is available. This is only intended to be used for logging and metrics.
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- EmptyCheckpointProvider → CheckpointProvider
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def
effectiveCheckpointSizeInBytes(): Long
Effective size of checkpoint across all files
Effective size of checkpoint across all files
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- EmptyCheckpointProvider → CheckpointProvider
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def
isEmpty: Boolean
True if the checkpoint provider is empty (does not refer to a valid checkpoint)
True if the checkpoint provider is empty (does not refer to a valid checkpoint)
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- UninitializedCheckpointProvider
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def
topLevelFileIndex: Option[DeltaLogFileIndex]
File index which could help derive actions stored in top level files for the checkpoint.
File index which could help derive actions stored in top level files for the checkpoint. This could be used to get Protocol, Metadata etc from a checkpoint. This could also be used if we want to shallow copy a checkpoint.
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def
topLevelFiles: Seq[FileStatus]
Top level files that represents this checkpoint.
Top level files that represents this checkpoint. These files could be reused again to initialize the CheckpointProvider.
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- EmptyCheckpointProvider → UninitializedCheckpointProvider
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def
version: Long
Checkpoint version
Checkpoint version
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- EmptyCheckpointProvider → UninitializedCheckpointProvider
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