org.apache.flink.streaming.api.operators

类 StreamProject<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>

java.lang.Object

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

org.apache.flink.streaming.api.operators.StreamProject<IN,OUT>

所有已实现的接口:

Serializable, org.apache.flink.runtime.state.CheckpointListener, KeyContext, OneInputStreamOperator<IN,OUT>, SetupableStreamOperator<OUT>, StreamOperator<OUT>, org.apache.flink.util.Disposable

@Internal
public class StreamProject<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>
extends AbstractStreamOperator<OUT>
implements OneInputStreamOperator<IN,OUT>

A StreamOperator for executing projections on streams.

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.api.operators.AbstractStreamOperator

AbstractStreamOperator.CountingOutput<OUT>

字段概要

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, latencyStats, LOG, metrics, output, timeServiceManager

构造器概要

构造器

构造器和说明
StreamProject(int[] fields, org.apache.flink.api.common.typeutils.TypeSerializer<OUT> outSerializer)

方法概要

限定符和类型	方法和说明
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 at this operator.

从类继承的方法 org.apache.flink.streaming.api.operators.AbstractStreamOperator

close, dispose, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getUserCodeClassloader, initializeState, initializeState, notifyCheckpointComplete, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setup, snapshotState, snapshotState

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.streaming.api.operators.OneInputStreamOperator

processLatencyMarker, processWatermark

从接口继承的方法 org.apache.flink.streaming.api.operators.StreamOperator

close, dispose, getChainingStrategy, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, snapshotState

从接口继承的方法 org.apache.flink.runtime.state.CheckpointListener

notifyCheckpointComplete

从接口继承的方法 org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

构造器详细资料

StreamProject

public StreamProject(int[] fields,
                     org.apache.flink.api.common.typeutils.TypeSerializer<OUT> outSerializer)

方法详细资料

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

从接口复制的说明: OneInputStreamOperator

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

指定者:

processElement 在接口中 OneInputStreamOperator<IN,OUT extends org.apache.flink.api.java.tuple.Tuple>

抛出:

Exception

open

public void open()
          throws Exception

从类复制的说明: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

指定者:

open 在接口中 StreamOperator<OUT extends org.apache.flink.api.java.tuple.Tuple>

覆盖:

open 在类中 AbstractStreamOperator<OUT extends org.apache.flink.api.java.tuple.Tuple>

抛出:

Exception - An exception in this method causes the operator to fail.