org.apache.flink.streaming.runtime.operators.asyncprocessing

Interface AsyncStateProcessingOperator

All Superinterfaces:

AsyncStateProcessing

All Known Implementing Classes:

AbstractAsyncStateStreamOperator, AbstractAsyncStateStreamOperatorV2, AbstractAsyncStateUdfStreamOperator

@Internal
public interface AsyncStateProcessingOperator
extends AsyncStateProcessing

A more detailed interface based on AsyncStateProcessing, which gives the essential methods for an operator to perform async state processing.

Method Summary

Modifier and Type	Method and Description
ElementOrder	getElementOrder() Get the ElementOrder of this operator.
void	postProcessElement() A callback that will be triggered after an element finishes processElement.
void	preserveRecordOrderAndProcess(org.apache.flink.util.function.ThrowingRunnable<Exception> processing) Check the order of same-key record, and then process the record.
<T> void	setAsyncKeyedContextElement(StreamRecord<T> record, org.apache.flink.api.java.functions.KeySelector<T,?> keySelector) Set key context for async state processing.

Methods inherited from interface org.apache.flink.streaming.runtime.operators.asyncprocessing.AsyncStateProcessing

getRecordProcessor, isAsyncStateProcessingEnabled, makeRecordProcessor

Method Detail

getElementOrder

ElementOrder getElementOrder()

Get the ElementOrder of this operator.

setAsyncKeyedContextElement

<T> void setAsyncKeyedContextElement(StreamRecord<T> record,
                                     org.apache.flink.api.java.functions.KeySelector<T,?> keySelector)
                              throws Exception

Set key context for async state processing.

Type Parameters:

T - the type of the record.

Parameters:

record - the record.

keySelector - the key selector to select a key from record.

Throws:

Exception

postProcessElement

void postProcessElement()

A callback that will be triggered after an element finishes processElement.

preserveRecordOrderAndProcess

void preserveRecordOrderAndProcess(org.apache.flink.util.function.ThrowingRunnable<Exception> processing)

Check the order of same-key record, and then process the record. Mainly used when the getElementOrder() returns ElementOrder.RECORD_ORDER.

Parameters:

processing - the record processing logic.