@Internal public class StreamProject<IN,OUT extends Tuple> extends AbstractStreamOperator<OUT> implements OneInputStreamOperator<IN,OUT>
StreamOperator
for executing projections on streams.chainingStrategy, config, latencyStats, LOG, metrics, output, processingTimeService
Constructor and Description |
---|
StreamProject(int[] fields,
TypeSerializer<OUT> outSerializer) |
Modifier and Type | Method and Description |
---|---|
void |
open()
This method is called immediately before any elements are processed, it should contain the
operator's initialization logic, e.g. state initialization.
|
void |
processElement(StreamRecord<IN> element)
Processes one element that arrived on this input of the
MultipleInputStreamOperator . |
close, finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
setKeyContextElement
close, finish, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState
notifyCheckpointAborted, notifyCheckpointComplete
getCurrentKey, setCurrentKey
processLatencyMarker, processWatermark, processWatermarkStatus
hasKeyContext
public StreamProject(int[] fields, TypeSerializer<OUT> outSerializer)
public void processElement(StreamRecord<IN> element) throws Exception
Input
MultipleInputStreamOperator
.
This method is guaranteed to not be called concurrently with other methods of the operator.processElement
in interface Input<IN>
Exception
public void open() throws Exception
AbstractStreamOperator
The default implementation does nothing.
open
in interface StreamOperator<OUT extends Tuple>
open
in class AbstractStreamOperator<OUT extends Tuple>
Exception
- An exception in this method causes the operator to fail.Copyright © 2014–2024 The Apache Software Foundation. All rights reserved.