Package org.apache.flink.datastream.impl.stream

Class AbstractDataStream<T>

java.lang.Object

org.apache.flink.datastream.impl.stream.AbstractDataStream<T>

All Implemented Interfaces:

org.apache.flink.datastream.api.stream.DataStream

Direct Known Subclasses:

BroadcastStreamImpl, GlobalStreamImpl, KeyedPartitionStreamImpl, NonKeyedPartitionStreamImpl

public abstract class AbstractDataStream<T>
extends Object
implements org.apache.flink.datastream.api.stream.DataStream

Base class for all streams.

Note: This is only used for internal implementation. It must not leak to user face api.

Field Summary

Fields

Modifier and Type	Field	Description
protected ExecutionEnvironmentImpl	environment
protected Map<org.apache.flink.util.OutputTag<?>,org.apache.flink.api.common.typeinfo.TypeInformation<?>>	requestedSideOutputs	We keep track of the side outputs that were already requested and their types.
protected org.apache.flink.api.dag.Transformation<T>	transformation

Constructor Summary

Constructors

Constructor	Description
AbstractDataStream(ExecutionEnvironmentImpl environment, org.apache.flink.api.dag.Transformation<T> transformation)

Method Summary

Modifier and Type	Method	Description
ExecutionEnvironmentImpl	getEnvironment()
<X> org.apache.flink.api.dag.Transformation<X>	getSideOutputTransform(org.apache.flink.util.OutputTag<X> outputTag)
org.apache.flink.api.dag.Transformation<T>	getTransformation()	This is only used for internal implementation.
org.apache.flink.api.common.typeinfo.TypeInformation<T>	getType()

Methods inherited from class java.lang.Object

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

Field Detail

environment

protected final ExecutionEnvironmentImpl environment

transformation

protected final org.apache.flink.api.dag.Transformation<T> transformation

requestedSideOutputs

protected final Map<org.apache.flink.util.OutputTag<?>,org.apache.flink.api.common.typeinfo.TypeInformation<?>> requestedSideOutputs

We keep track of the side outputs that were already requested and their types. With this, we can catch the case when a side output with a matching id is requested for a different type because this would lead to problems at runtime.

Constructor Detail

AbstractDataStream

public AbstractDataStream(ExecutionEnvironmentImpl environment,
                          org.apache.flink.api.dag.Transformation<T> transformation)

Method Detail

getType

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

getTransformation

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

This is only used for internal implementation. It must not leak to user face api.

getEnvironment

public ExecutionEnvironmentImpl getEnvironment()

getSideOutputTransform

public <X> org.apache.flink.api.dag.Transformation<X> getSideOutputTransform(org.apache.flink.util.OutputTag<X> outputTag)