org.apache.flink.streaming.api.operators

Class StreamCounter<IN>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<Long>

org.apache.flink.streaming.api.operators.StreamCounter<IN>

All Implemented Interfaces:

Serializable, OneInputStreamOperator<IN,Long>, StreamOperator<Long>

@Internal
public class StreamCounter<IN>
extends AbstractStreamOperator<Long>
implements OneInputStreamOperator<IN,Long>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

AbstractStreamOperator.CountingOutput

Field Summary

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, LOG, metrics, output

Constructor Summary

Constructors

Constructor and Description
StreamCounter()

Method Summary

Modifier and Type	Method and Description
void	processElement(StreamRecord<IN> element) Processes one element that arrived at this operator.
void	processWatermark(Watermark mark) Processes a Watermark.

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

close, dispose, getChainingStrategy, getContainingTask, getCurrentProcessingTime, getExecutionConfig, getMetricGroup, getOperatorConfig, getPartitionedState, getPartitionedState, getRuntimeContext, getStateBackend, getUserCodeClassloader, notifyOfCompletedCheckpoint, open, registerTimer, restoreState, setChainingStrategy, setKeyContext, setKeyContextElement1, setKeyContextElement2, setup, snapshotOperatorState

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

close, dispose, getChainingStrategy, getMetricGroup, notifyOfCompletedCheckpoint, open, restoreState, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, setup, snapshotOperatorState

Constructor Detail

StreamCounter

public StreamCounter()

Method Detail

processElement

public void processElement(StreamRecord<IN> element)

Description copied from interface: OneInputStreamOperator

Processes one element that arrived at this operator. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processElement in interface OneInputStreamOperator<IN,Long>

processWatermark

public void processWatermark(Watermark mark)
                      throws Exception

Description copied from interface: OneInputStreamOperator

Processes a Watermark. This method is guaranteed to not be called concurrently with other methods of the operator.

Specified by:

processWatermark in interface OneInputStreamOperator<IN,Long>

Throws:

Exception

See Also:

Watermark