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 Details

    • 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 Details

    • AbstractDataStream

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

  • Method Details

    • 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)