OutputWithChainingCheck (Flink : 2.0-SNAPSHOT API)

All Superinterfaces:

AutoCloseable, Closeable, Collector<OUT>, Output<OUT>, WatermarkGaugeExposingOutput<OUT>

All Known Implementing Classes:

RecordWriterOutput
```
@Internal
public interface OutputWithChainingCheck<OUT>
extends WatermarkGaugeExposingOutput<OUT>
```
This is a wrapper for outputs to check whether the collected record has been emitted to a downstream subtask or to a chained operator.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`<X> boolean`	`collectAndCheckIfChained(OutputTag<X> outputTag, StreamRecord<X> record)`
`boolean`	`collectAndCheckIfChained(OUT record)`

Methods inherited from interface java.io.Closeable
close

Methods inherited from interface org.apache.flink.util.Collector
close, collect

Methods inherited from interface org.apache.flink.streaming.api.operators.Output
collect, emitLatencyMarker, emitRecordAttributes, emitWatermark, emitWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.runtime.tasks.WatermarkGaugeExposingOutput
getWatermarkGauge

- Method Detail
  - collectAndCheckIfChained
```
boolean collectAndCheckIfChained(OUT record)
```
    Returns:
    
    true if the collected record has been emitted to a downstream subtask. Otherwise, false.
  - collectAndCheckIfChained
```
<X> boolean collectAndCheckIfChained(OutputTag<X> outputTag,
                                     StreamRecord<X> record)
```
    Returns:
    
    true if the collected record has been emitted to a downstream subtask. Otherwise, false.