Package akka.http.impl.util

Class StreamUtils

  • public class StreamUtils
extends java.lang.Object
    INTERNAL API

    • Constructor Summary

      Constructors 
      Constructor Description
      StreamUtils()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static akka.stream.stage.GraphStage<akka.stream.FlowShape<akka.util.ByteString,​akka.util.ByteString>> byteStringTransformer​(scala.Function1<akka.util.ByteString,​akka.util.ByteString> f, scala.Function0<akka.util.ByteString> finish)
      Creates a transformer that will call f for each incoming ByteString and output its result.
      static void cancelSource​(akka.stream.scaladsl.Source<?,​?> source, akka.stream.Materializer materializer)
      Tries to guess whether a source needs to cancelled and how.
      static <T,​Mat>
      scala.Tuple4<akka.stream.scaladsl.Source<T,​Mat>,​scala.concurrent.Future<scala.runtime.BoxedUnit>,​scala.concurrent.Future<scala.runtime.BoxedUnit>,​akka.stream.KillSwitch>      		 captureMaterializationTerminationAndKillSwitch​(akka.stream.scaladsl.Source<T,​Mat> source)  
      static <T,​Mat>
      scala.Tuple2<akka.stream.scaladsl.Source<T,​Mat>,​scala.concurrent.Future<scala.runtime.BoxedUnit>>      		 captureTermination​(akka.stream.scaladsl.Source<T,​Mat> source)  
      static <T> akka.stream.scaladsl.Flow<T,​T,​akka.NotUsed> delayCancellation​(scala.concurrent.duration.Duration cancelAfter)
      INTERNAL API
      static <T> akka.stream.scaladsl.Flow<T,​T,​akka.NotUsed> encodeErrorAndComplete​(scala.Function1<java.lang.Throwable,​T> f)  
      static akka.stream.stage.GraphStage<akka.stream.FlowShape<akka.util.ByteString,​akka.util.ByteString>> limitByteChunksStage​(int maxBytesPerChunk)  
      static akka.stream.Materializer OnlyRunInGraphInterpreterContext()
      Dummy name to signify that the caller asserts that cancelSource is only run from within a GraphInterpreter context
      static akka.stream.scaladsl.Flow<akka.util.ByteString,​akka.util.ByteString,​akka.NotUsed> sliceBytesTransformer​(long start, long length)  
      static <T,​U>
      akka.stream.scaladsl.Flow<T,​U,​akka.NotUsed>      		 statefulAttrsMap​(scala.Function1<akka.stream.Attributes,​scala.Function1<T,​U>> functionConstructor)
      Lifts the streams attributes into an element and passes them to the function for each passed through element.
      static <T extends HttpEntity,​M>
      scala.Tuple2<T,​M>      		 transformEntityStream​(T entity, StreamUtils.EntityStreamOp<M> streamOp)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • StreamUtils

        public StreamUtils()

    • Method Detail

      • byteStringTransformer

        public static akka.stream.stage.GraphStage<akka.stream.FlowShape<akka.util.ByteString,​akka.util.ByteString>> byteStringTransformer​(scala.Function1<akka.util.ByteString,​akka.util.ByteString> f,
                                                                                                                                         scala.Function0<akka.util.ByteString> finish)
        Creates a transformer that will call f for each incoming ByteString and output its result. After the complete input has been read it will call finish once to determine the final ByteString to post to the output. Empty ByteStrings are discarded.
        Parameters:
        f - (undocumented)
        finish - (undocumented)
        Returns:
        (undocumented)

      • captureTermination

        public static <T,​Mat> scala.Tuple2<akka.stream.scaladsl.Source<T,​Mat>,​scala.concurrent.Future<scala.runtime.BoxedUnit>> captureTermination​(akka.stream.scaladsl.Source<T,​Mat> source)

      • captureMaterializationTerminationAndKillSwitch

        public static <T,​Mat> scala.Tuple4<akka.stream.scaladsl.Source<T,​Mat>,​scala.concurrent.Future<scala.runtime.BoxedUnit>,​scala.concurrent.Future<scala.runtime.BoxedUnit>,​akka.stream.KillSwitch> captureMaterializationTerminationAndKillSwitch​(akka.stream.scaladsl.Source<T,​Mat> source)

      • sliceBytesTransformer

        public static akka.stream.scaladsl.Flow<akka.util.ByteString,​akka.util.ByteString,​akka.NotUsed> sliceBytesTransformer​(long start,
                                                                                                                                  long length)

      • limitByteChunksStage

        public static akka.stream.stage.GraphStage<akka.stream.FlowShape<akka.util.ByteString,​akka.util.ByteString>> limitByteChunksStage​(int maxBytesPerChunk)

      • delayCancellation

        public static <T> akka.stream.scaladsl.Flow<T,​T,​akka.NotUsed> delayCancellation​(scala.concurrent.duration.Duration cancelAfter)
        INTERNAL API

        Returns a flow that is almost identity but delays propagation of cancellation from downstream to upstream.

        Parameters:
        cancelAfter - (undocumented)
        Returns:
        (undocumented)

      • statefulAttrsMap

        public static <T,​U> akka.stream.scaladsl.Flow<T,​U,​akka.NotUsed> statefulAttrsMap​(scala.Function1<akka.stream.Attributes,​scala.Function1<T,​U>> functionConstructor)
        Lifts the streams attributes into an element and passes them to the function for each passed through element. Similar idea than FlowOps.statefulMapConcat but for a simple map.

        The result of Attributes => (T => U) is cached, and only the T => U function will be invoked afterwards for each element.

        Parameters:
        functionConstructor - (undocumented)
        Returns:
        (undocumented)

      • OnlyRunInGraphInterpreterContext

        public static akka.stream.Materializer OnlyRunInGraphInterpreterContext()
        Dummy name to signify that the caller asserts that cancelSource is only run from within a GraphInterpreter context

      • cancelSource

        public static void cancelSource​(akka.stream.scaladsl.Source<?,​?> source,
                                akka.stream.Materializer materializer)
        Tries to guess whether a source needs to cancelled and how. In the best case no materialization should be needed.
        Parameters:
        source - (undocumented)
        materializer - (undocumented)

      • encodeErrorAndComplete

        public static <T> akka.stream.scaladsl.Flow<T,​T,​akka.NotUsed> encodeErrorAndComplete​(scala.Function1<java.lang.Throwable,​T> f)