org.apache.flink.streaming.api.datastream

类 BroadcastStream<T>

java.lang.Object

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

类型参数:

T - The type of input/output elements.

@PublicEvolving
public class BroadcastStream<T>
extends Object

A BroadcastStream is a stream with broadcast state(s). This can be created by any stream using the DataStream.broadcast(MapStateDescriptor[]) method and implicitly creates states where the user can store elements of the created BroadcastStream. (see BroadcastConnectedStream).

Note that no further operation can be applied to these streams. The only available option is to connect them with a keyed or non-keyed stream, using the DataStream.connect(BroadcastStream) and the DataStream.connect(BroadcastStream) respectively. Applying these methods will result it a BroadcastConnectedStream for further processing.

构造器概要

构造器

限定符	构造器和说明
protected	BroadcastStream(StreamExecutionEnvironment env, DataStream<T> input, org.apache.flink.api.common.state.MapStateDescriptor<?,?>... broadcastStateDescriptors)

方法概要

限定符和类型	方法和说明
<F> F	clean(F f)
List<org.apache.flink.api.common.state.MapStateDescriptor<?,?>>	getBroadcastStateDescriptor()
StreamExecutionEnvironment	getEnvironment()
org.apache.flink.api.dag.Transformation<T>	getTransformation()
org.apache.flink.api.common.typeinfo.TypeInformation<T>	getType()

从类继承的方法 java.lang.Object

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

构造器详细资料

BroadcastStream

protected BroadcastStream(StreamExecutionEnvironment env,
                          DataStream<T> input,
                          org.apache.flink.api.common.state.MapStateDescriptor<?,?>... broadcastStateDescriptors)

方法详细资料

getType

public org.apache.flink.api.common.typeinfo.TypeInformation<T> getType()

clean

public <F> F clean(F f)

getTransformation

public org.apache.flink.api.dag.Transformation<T> getTransformation()

getBroadcastStateDescriptor

public List<org.apache.flink.api.common.state.MapStateDescriptor<?,?>> getBroadcastStateDescriptor()

getEnvironment

public StreamExecutionEnvironment getEnvironment()