com.google.cloud.dataflow.sdk.util

Interface ReduceFn.MergingStateContext

All Superinterfaces:

ReduceFn.StateContext

Enclosing class:

ReduceFn<K,InputT,OutputT,W extends BoundedWindow>

public static interface ReduceFn.MergingStateContext
extends ReduceFn.StateContext

Interface for interacting with persistent state within ReduceFn.onMerge(com.google.cloud.dataflow.sdk.util.ReduceFn<K, InputT, OutputT, W>.OnMergeContext).

Method Summary

Modifier and Type	Method and Description
<StateT extends MergeableState<?,?>> StateT	accessAcrossMergingWindows(StateTag<StateT> address) Access a merged view of the storage for the given address in all of the windows being merged.
<StateT extends State> Map<BoundedWindow,StateT>	accessInEachMergingWindow(StateTag<StateT> address) Access a map from windows being merged to the associated StateT.

Methods inherited from interface com.google.cloud.dataflow.sdk.util.ReduceFn.StateContext

access, accessAcrossMergedWindows

Method Detail

accessAcrossMergingWindows

<StateT extends MergeableState<?,?>> StateT accessAcrossMergingWindows(StateTag<StateT> address)

Access a merged view of the storage for the given address in all of the windows being merged.

accessInEachMergingWindow

<StateT extends State> Map<BoundedWindow,StateT> accessInEachMergingWindow(StateTag<StateT> address)

Access a map from windows being merged to the associated StateT.