Package org.apache.beam.sdk.io.kudu

Class KuduIO.Read<T>

java.lang.Object
org.apache.beam.sdk.transforms.PTransform<PBegin,PCollection<T>>
org.apache.beam.sdk.io.kudu.KuduIO.Read<T>
All Implemented Interfaces:
Serializable, HasDisplayData
Enclosing class:
KuduIO
public abstract static class KuduIO.Read<T> extends PTransform<PBegin,PCollection<T>>
Implementation of KuduIO.read().
See Also:

  • Constructor Details

    • Read

      public Read()

  • Method Details

    • withMasterAddresses

      public KuduIO.Read<T> withMasterAddresses(String masterAddresses)
      Reads from the Kudu cluster on the specified master addresses.

    • withTable

      public KuduIO.Read<T> withTable(String table)
      Reads from the specified table.

    • withParseFn

      public KuduIO.Read<T> withParseFn(SerializableFunction<org.apache.kudu.client.RowResult,T> parseFn)
      Provides the function to parse a row from Kudu into the typed object.

    • withPredicates

      public KuduIO.Read<T> withPredicates(List<org.apache.kudu.client.KuduPredicate> predicates)
      Filters the rows read from Kudu using the given predicates.

    • withProjectedColumns

      public KuduIO.Read<T> withProjectedColumns(List<String> projectedColumns)
      Filters the columns read from the table to include only those specified.

    • withBatchSize

      public KuduIO.Read<T> withBatchSize(int batchSize)
      Reads from the table in batches of the specified size.

    • withFaultTolerent

      public KuduIO.Read<T> withFaultTolerent(boolean faultTolerent)
      Instructs the read scan to resume a scan on another tablet server if the current server fails and faultTolerant is set to true.

    • withCoder

      public KuduIO.Read<T> withCoder(Coder<T> coder)
      Sets a Coder for the result of the parse function. This may be required if a coder can not be inferred automatically.

    • expand

      public PCollection<T> expand(PBegin input)
      Description copied from class: PTransform
      Override this method to specify how this PTransform should be expanded on the given InputT.

      NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

      Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

      Specified by:
      expand in class PTransform<PBegin,PCollection<T>>

    • validate

      public void validate(PipelineOptions pipelineOptions)
      Description copied from class: PTransform
      Called before running the Pipeline to verify this transform is fully and correctly specified.

      By default, does nothing.

      Overrides:
      validate in class PTransform<PBegin,PCollection<T>>

    • populateDisplayData

      public void populateDisplayData(DisplayData.Builder builder)
      Description copied from class: PTransform
      Register display data for the given transform or component.

      populateDisplayData(DisplayData.Builder) is invoked by Pipeline runners to collect display data via DisplayData.from(HasDisplayData). Implementations may call super.populateDisplayData(builder) in order to register display data in the current namespace, but should otherwise use subcomponent.populateDisplayData(builder) to use the namespace of the subcomponent.

      By default, does not register any display data. Implementors may override this method to provide their own display data.

      Specified by:
      populateDisplayData in interface HasDisplayData
      Overrides:
      populateDisplayData in class PTransform<PBegin,PCollection<T>>
      Parameters:
      builder - The builder to populate with display data.
      See Also: