vectorpipe.sources.ChangesetProvider.scala Maven / Gradle / Ivy

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package vectorpipe.sources

import java.util.Optional

import org.apache.spark.sql.sources.DataSourceRegister
import org.apache.spark.sql.sources.v2.reader.DataSourceReader
import org.apache.spark.sql.sources.v2.reader.streaming.MicroBatchReader
import org.apache.spark.sql.sources.v2.{
  DataSourceOptions,
  DataSourceV2,
  MicroBatchReadSupport,
  ReadSupport
}
import org.apache.spark.sql.types.StructType

class ChangesetProvider
    extends DataSourceV2
    with ReadSupport
    with MicroBatchReadSupport
    with DataSourceRegister {
  override def createMicroBatchReader(
    schema: Optional[StructType],
    checkpointLocation: String,
    options: DataSourceOptions
  ): MicroBatchReader = {
    if (schema.isPresent) {
      throw new IllegalStateException(
        "The changesets source does not support a user-specified schema."
      )
    }

    new ChangesetMicroBatchReader(options, checkpointLocation)
  }

  override def shortName(): String = Source.Changesets
  override def createReader(options: DataSourceOptions): DataSourceReader =
    ChangesetReader(options)
}