Package org.apache.beam.sdk.io.gcp.bigquery

Class CreateTables<DestinationT,ElementT>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<DestinationT,ElementT>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<TableDestination,ElementT>>>

org.apache.beam.sdk.io.gcp.bigquery.CreateTables<DestinationT,ElementT>

All Implemented Interfaces:

java.io.Serializable, org.apache.beam.sdk.transforms.display.HasDisplayData

public class CreateTables<DestinationT,ElementT>
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<DestinationT,ElementT>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<TableDestination,ElementT>>>

Creates any tables needed before performing streaming writes to the tables. This is a side-effect DoFn, and returns the original collection unchanged.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor	Description
CreateTables(BigQueryIO.Write.CreateDisposition createDisposition, DynamicDestinations<?,DestinationT> dynamicDestinations)	The list of tables created so far, so we don't try the creation each time.

Method Summary

Modifier and Type	Method	Description
org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<TableDestination,ElementT>>	expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<DestinationT,ElementT>> input)

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CreateTables

public CreateTables(BigQueryIO.Write.CreateDisposition createDisposition,
                    DynamicDestinations<?,DestinationT> dynamicDestinations)

The list of tables created so far, so we don't try the creation each time.

TODO: We should put a bound on memory usage of this. Use guava cache instead.

Method Detail

expand

public org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<TableDestination,ElementT>> expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<DestinationT,ElementT>> input)

Specified by:

expand in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<DestinationT,ElementT>>,org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.values.KV<TableDestination,ElementT>>>