class DeltaSourceMetadataTrackingLog extends AnyRef

Tracks the metadata changes for a particular Delta streaming source in a particular stream, it is utilized to save and lookup the correct metadata during streaming from a Delta table. This schema log is NOT meant to be shared across different Delta streaming source instances.

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  1. final def !=(arg0: Any): Boolean
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  2. final def ##: Int
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_ <: AnyRef]
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    @native()
  10. def getCurrentTrackedMetadata: Option[PersistedMetadata]

    Get the current schema that is being tracked by this schema log.

    Get the current schema that is being tracked by this schema log. This is typically the latest schema log entry to the best of this schema log's knowledge.

  11. def getPreviousTrackedMetadata: Option[PersistedMetadata]

    Get the logically-previous tracked schema entry by this schema log.

    Get the logically-previous tracked schema entry by this schema log. DeltaSource requires it to compare the previous schema with the latest schema to determine if an automatic stream restart is allowed.

  12. def hashCode(): Int
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    @native()
  13. val initMetadataLogEagerly: Boolean
  14. final def isInstanceOf[T0]: Boolean
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  15. final def ne(arg0: AnyRef): Boolean
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  16. final def notify(): Unit
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  17. final def notifyAll(): Unit
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    @native()
  18. val schemaSerializer: JsonSchemaSerializer[PersistedMetadata]
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  19. final def synchronized[T0](arg0: => T0): T0
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  20. def toString(): String
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  21. val trackingLog: SchemaTrackingLog[PersistedMetadata]
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  22. final def wait(): Unit
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  23. final def wait(arg0: Long, arg1: Int): Unit
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  24. final def wait(arg0: Long): Unit
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  25. def writeNewMetadata(newMetadata: PersistedMetadata, replaceCurrent: Boolean = false): PersistedMetadata

    Track a new schema to the log.

    Track a new schema to the log.

    newMetadata

    The incoming new metadata with schema.

    replaceCurrent

    If true, we will set a previous seq num pointer on the incoming metadata change pointing to the previous seq num of the current latest metadata. So that once the new metadata is written, getPreviousTrackedMetadata() will return the updated reference. If a previous metadata does not exist, this is noop.

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