Package io.pravega.client.stream.impl

Class WatermarkReaderImpl

  • All Implemented Interfaces:
    java.lang.AutoCloseable
    public class WatermarkReaderImpl
extends java.lang.Object
implements java.lang.AutoCloseable

    • Constructor Summary

      Constructors 
      Constructor Description
      WatermarkReaderImpl​(Stream stream, RevisionedStreamClient<io.pravega.shared.watermarks.Watermark> markClient, java.util.concurrent.Executor executor)
      Creates a Reader to keep track of the current time window for a given stream.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void advanceTo​(java.util.Map<SegmentWithRange,​java.lang.Long> readerGroupPosition)
      Advances the position in the watermark segment based on the provided position.
      void close()  
      TimeWindow getTimeWindow()
      Returns the current time window of the reader group for the associated stream.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • WatermarkReaderImpl

        public WatermarkReaderImpl​(Stream stream,
                           RevisionedStreamClient<io.pravega.shared.watermarks.Watermark> markClient,
                           java.util.concurrent.Executor executor)
        Creates a Reader to keep track of the current time window for a given stream.
        Parameters:
        stream - The stream to read the water marks for.
        markClient - The segment to read marks from.
        executor - A threadpool to perform background operations.

    • Method Detail

      • advanceTo

        public void advanceTo​(java.util.Map<SegmentWithRange,​java.lang.Long> readerGroupPosition)
        Advances the position in the watermark segment based on the provided position.
        Parameters:
        readerGroupPosition - - The latest read positions of the open segments in the reader group.

      • getTimeWindow

        public TimeWindow getTimeWindow()
        Returns the current time window of the reader group for the associated stream. The value returned will only change after calling advanceTo(Map).
        Returns:
        TimeWindow the bounds on the upper and lower times provided by the writer at the time of writing.

      • close

        public void close()
        Specified by:
        close in interface java.lang.AutoCloseable