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public interface CheckpointingFramework
This interface defines the functionalities offered by the checkpointing framework.
Nested Class Summary | |
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static class |
CheckpointingFramework.StorageResultCode
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Method Summary | |
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byte[] |
fetchSerializedState(CheckpointId key)
Fetches checkpoint data from storage for a given PE |
boolean |
isCheckpointable(ProcessingElement pe)
Evaluates whether specified PE should be checkpointed, based on: whether checkpointing enabled whether the pe is "dirty" the checkpointing frequency settings This is used for count-based checkpointing intervals. |
StorageCallback |
saveState(ProcessingElement pe)
Serializes and stores state to the storage backend. |
Method Detail |
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StorageCallback saveState(ProcessingElement pe)
byte[] fetchSerializedState(CheckpointId key)
key
- safeKeeperId
boolean isCheckpointable(ProcessingElement pe)
pe
- processing element to evaluate
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