com.google.cloud.dataflow.sdk.util.common

Interface ElementByteSizeObservable<T>

Type Parameters:

T - the type of the values being observed

All Known Implementing Classes:

MapTaskExecutorFactory.ElementByteSizeObservableCoder

public interface ElementByteSizeObservable<T>

An interface for things that allow observing the size in bytes of encoded values of type T.

Method Summary

Modifier and Type	Method and Description
boolean	isRegisterByteSizeObserverCheap(T value) Returns whether registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver) is cheap enough to call for every element, that is, if this ElementByteSizeObservable can calculate the byte size of the element to be coded in roughly constant time (or lazily).
void	registerByteSizeObserver(T value, ElementByteSizeObserver observer) Notifies the ElementByteSizeObserver about the byte size of the encoded value using this ElementByteSizeObservable.

Method Detail

isRegisterByteSizeObserverCheap

boolean isRegisterByteSizeObserverCheap(T value)

Returns whether registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver) is cheap enough to call for every element, that is, if this ElementByteSizeObservable can calculate the byte size of the element to be coded in roughly constant time (or lazily).

registerByteSizeObserver

void registerByteSizeObserver(T value,
                              ElementByteSizeObserver observer)
                       throws Exception

Notifies the ElementByteSizeObserver about the byte size of the encoded value using this ElementByteSizeObservable.

Throws:

Exception