Package org.apache.flink.streaming.api.datastream

Class DataStreamSource<T>

java.lang.Object

org.apache.flink.streaming.api.datastream.DataStream<T>

org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator<T>

org.apache.flink.streaming.api.datastream.DataStreamSource<T>

Type Parameters:

T - Type of the elements in the DataStream created from the this source.

@Public
public class DataStreamSource<T>
extends SingleOutputStreamOperator<T>

The DataStreamSource represents the starting point of a DataStream.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.datastream.DataStream

DataStream.Collector<T>

Field Summary

Fields inherited from class org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator

nonParallel

Fields inherited from class org.apache.flink.streaming.api.datastream.DataStream

environment, transformation

Constructor Summary

Constructors

Constructor	Description
DataStreamSource(SingleOutputStreamOperator<T> operator)	Constructor for "deep" sources that manually set up (one or more) custom configured complex operators.
DataStreamSource(StreamExecutionEnvironment environment, org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo, StreamSource<T,?> operator, boolean isParallel, String sourceName)
DataStreamSource(StreamExecutionEnvironment environment, org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo, StreamSource<T,?> operator, boolean isParallel, String sourceName, org.apache.flink.api.connector.source.Boundedness boundedness)	The constructor used to create legacy sources.
DataStreamSource(StreamExecutionEnvironment environment, org.apache.flink.api.connector.source.Source<T,?,?> source, org.apache.flink.api.common.eventtime.WatermarkStrategy<T> watermarkStrategy, org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo, String sourceName)	Constructor for new Sources (FLIP-27).

Method Summary

Modifier and Type	Method	Description
DataStreamSource<T>	setParallelism(int parallelism)	Sets the parallelism for this operator.

Methods inherited from class org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator

cache, disableChaining, enableAsyncState, forceNonParallel, getName, getSideOutput, name, returns, returns, returns, setBufferTimeout, setDescription, setMaxParallelism, setUidHash, slotSharingGroup, slotSharingGroup, startNewChain, uid

Methods inherited from class org.apache.flink.streaming.api.datastream.DataStream

addSink, assignTimestampsAndWatermarks, broadcast, broadcast, clean, coGroup, collectAsync, collectAsync, connect, connect, countWindowAll, countWindowAll, doTransform, executeAndCollect, executeAndCollect, executeAndCollect, executeAndCollect, filter, flatMap, flatMap, forward, fullWindowPartition, getExecutionConfig, getExecutionEnvironment, getId, getMinResources, getParallelism, getPreferredResources, getTransformation, getType, global, join, keyBy, keyBy, keyBy, map, map, partitionCustom, print, print, printToErr, printToErr, process, process, project, rebalance, rescale, setConnectionType, shuffle, sinkTo, sinkTo, transform, transform, union, windowAll, writeToSocket, writeUsingOutputFormat

Methods inherited from class java.lang.Object

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

Constructor Details

DataStreamSource

public DataStreamSource(StreamExecutionEnvironment environment,
 org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo,
 StreamSource<T,?> operator,
 boolean isParallel,
 String sourceName)

DataStreamSource

public DataStreamSource(StreamExecutionEnvironment environment,
 org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo,
 StreamSource<T,?> operator,
 boolean isParallel,
 String sourceName,
 org.apache.flink.api.connector.source.Boundedness boundedness)

The constructor used to create legacy sources.

DataStreamSource

public DataStreamSource(SingleOutputStreamOperator<T> operator)

Constructor for "deep" sources that manually set up (one or more) custom configured complex operators.

DataStreamSource

public DataStreamSource(StreamExecutionEnvironment environment,
 org.apache.flink.api.connector.source.Source<T,?,?> source,
 org.apache.flink.api.common.eventtime.WatermarkStrategy<T> watermarkStrategy,
 org.apache.flink.api.common.typeinfo.TypeInformation<T> outTypeInfo,
 String sourceName)

Constructor for new Sources (FLIP-27).

Method Details

setParallelism

public DataStreamSource<T> setParallelism(int parallelism)

Description copied from class: SingleOutputStreamOperator

Sets the parallelism for this operator.

Overrides:

setParallelism in class SingleOutputStreamOperator<T>

Parameters:

parallelism - The parallelism for this operator.

Returns:

The operator with set parallelism.