org.apache.flink.streaming.runtime.io

Class StreamTwoInputProcessor<IN1,IN2>

java.lang.Object

org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor<IN1,IN2>

Type Parameters:

IN1 - The type of the records that arrive on the first input

IN2 - The type of the records that arrive on the second input

@Internal
public class StreamTwoInputProcessor<IN1,IN2>
extends Object

Input reader for TwoInputStreamTask.

This internally uses a StatusWatermarkValve to keep track of Watermark and StreamStatus events, and forwards watermarks to event subscribers once the StatusWatermarkValve determines the watermarks from all inputs has advanced, or changes the task's StreamStatus once status change is toggled.

Forwarding elements, watermarks, or status status elements must be protected by synchronizing on the given lock object. This ensures that we don't call methods on a TwoInputStreamOperator concurrently with the timer callback or other things.

Constructor Summary

Constructors

Constructor and Description

StreamTwoInputProcessor(Collection<org.apache.flink.runtime.io.network.partition.consumer.InputGate> inputGates1, Collection<org.apache.flink.runtime.io.network.partition.consumer.InputGate> inputGates2, org.apache.flink.api.common.typeutils.TypeSerializer<IN1> inputSerializer1, org.apache.flink.api.common.typeutils.TypeSerializer<IN2> inputSerializer2, TwoInputStreamTask<IN1,IN2,?> checkpointedTask, CheckpointingMode checkpointMode, Object lock, org.apache.flink.runtime.io.disk.iomanager.IOManager ioManager, org.apache.flink.configuration.Configuration taskManagerConfig, StreamStatusMaintainer streamStatusMaintainer, TwoInputStreamOperator<IN1,IN2,?> streamOperator, org.apache.flink.runtime.metrics.groups.TaskIOMetricGroup metrics, WatermarkGauge input1WatermarkGauge, WatermarkGauge input2WatermarkGauge)

Method Summary

Modifier and Type	Method and Description
void	cleanup()
boolean	processInput()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StreamTwoInputProcessor

public StreamTwoInputProcessor(Collection<org.apache.flink.runtime.io.network.partition.consumer.InputGate> inputGates1,
                               Collection<org.apache.flink.runtime.io.network.partition.consumer.InputGate> inputGates2,
                               org.apache.flink.api.common.typeutils.TypeSerializer<IN1> inputSerializer1,
                               org.apache.flink.api.common.typeutils.TypeSerializer<IN2> inputSerializer2,
                               TwoInputStreamTask<IN1,IN2,?> checkpointedTask,
                               CheckpointingMode checkpointMode,
                               Object lock,
                               org.apache.flink.runtime.io.disk.iomanager.IOManager ioManager,
                               org.apache.flink.configuration.Configuration taskManagerConfig,
                               StreamStatusMaintainer streamStatusMaintainer,
                               TwoInputStreamOperator<IN1,IN2,?> streamOperator,
                               org.apache.flink.runtime.metrics.groups.TaskIOMetricGroup metrics,
                               WatermarkGauge input1WatermarkGauge,
                               WatermarkGauge input2WatermarkGauge)
                        throws IOException

Throws:

IOException

Method Detail

processInput

public boolean processInput()
                     throws Exception

Throws:

Exception

cleanup

public void cleanup()
             throws IOException

Throws:

IOException