com.google.cloud.dataflow.sdk.util

Interface SizedSideInputReader

All Superinterfaces:

SideInputReader

All Known Implementing Classes:

DataflowSideInputReader, SizedSideInputReader.Defaults

public interface SizedSideInputReader
extends SideInputReader

Extension to SideInputReader that can approximate the size of the side input.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	SizedSideInputReader.Defaults Abstract class providing default implementations for methods of SizedSideInputReader.

Method Summary

Modifier and Type	Method and Description
<T> Sized<T>	getSized(PCollectionView<T> view, BoundedWindow window) Returns the value of the requested PCollectionView for the given BoundedWindow along with a rough estimate of the number of bytes of memory it consumes.

Methods inherited from interface com.google.cloud.dataflow.sdk.util.SideInputReader

contains, get, isEmpty

Method Detail

getSized

<T> Sized<T> getSized(PCollectionView<T> view,
                      BoundedWindow window)

Returns the value of the requested PCollectionView for the given BoundedWindow along with a rough estimate of the number of bytes of memory it consumes.

It is valid for a side input value to be null. In this case, the return value of this method must still be non-null. It should be a Sized object where Sized.getValue() returns null and Sized.getSize() may still return any non-negative value.