Package org.apache.flink.runtime.state

Interface StateSnapshotRestore

All Known Implementing Classes:
CopyOnWriteStateTable, HeapPriorityQueueSnapshotRestoreWrapper, StateTable
@Internal public interface StateSnapshotRestore
Interface to deal with state snapshot and restore of state. TODO find better name?

  • Method Details

    • stateSnapshot

      @Nonnull StateSnapshot stateSnapshot()
      Returns a snapshot of the state.

    • keyGroupReader

      @Nonnull StateSnapshotKeyGroupReader keyGroupReader(int readVersionHint)
      This method returns a StateSnapshotKeyGroupReader that can be used to restore the state on a per-key-group basis. This method tries to return a reader for the given version hint.
      Parameters:
      readVersionHint - the required version of the state to read.
      Returns:
      a reader that reads state by key-groups, for the given read version.