org.apache.flink.streaming.runtime.io

Interface StreamInputProcessor

All Superinterfaces:

AutoCloseable, org.apache.flink.runtime.io.AvailabilityProvider, Closeable

All Known Implementing Classes:

StreamMultipleInputProcessor, StreamOneInputProcessor

@Internal
public interface StreamInputProcessor
extends org.apache.flink.runtime.io.AvailabilityProvider, Closeable

Interface for processing records by StreamTask.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

org.apache.flink.runtime.io.AvailabilityProvider.AvailabilityHelper

Field Summary

Fields inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

AVAILABLE

Method Summary

Modifier and Type	Method and Description
CompletableFuture<Void>	prepareSnapshot(org.apache.flink.runtime.checkpoint.channel.ChannelStateWriter channelStateWriter, long checkpointId)
DataInputStatus	processInput() In case of two and more input processors this method must call InputSelectable.nextSelection() to choose which input to consume from next.

Methods inherited from interface org.apache.flink.runtime.io.AvailabilityProvider

and, getAvailableFuture, isApproximatelyAvailable, isAvailable, or

Methods inherited from interface java.io.Closeable

close

Method Detail

processInput

DataInputStatus processInput()
                      throws Exception

In case of two and more input processors this method must call InputSelectable.nextSelection() to choose which input to consume from next.

Returns:

input status to estimate whether more records can be processed immediately or not. If there are no more records available at the moment and the caller should check finished state and/or AvailabilityProvider.getAvailableFuture().

Throws:

Exception

prepareSnapshot

CompletableFuture<Void> prepareSnapshot(org.apache.flink.runtime.checkpoint.channel.ChannelStateWriter channelStateWriter,
                                        long checkpointId)
                                 throws org.apache.flink.runtime.checkpoint.CheckpointException

Throws:

org.apache.flink.runtime.checkpoint.CheckpointException