Examples of eu.stratosphere.nephele.services.iomanager.HeaderlessChannelReaderInputView

Package eu.stratosphere.nephele.services.iomanager

Examples of eu.stratosphere.nephele.services.iomanager.HeaderlessChannelReaderInputView

eu.stratosphere.nephele.services.iomanager.HeaderlessChannelReaderInputView
A {@link DataInputView} that is backed by a {@link BlockChannelReader}, making it effectively a data input stream. This view is similar to the {@link ChannelReaderInputView}, but does not expect a header for each block, giving a direct stream abstraction over sequence of written blocks. It therefore requires specification of the number of blocks and the number of bytes in the last block.

      final List<MemorySegment> segments = new ArrayList<MemorySegment>(2);
      segments.add(getNextBuffer());
      segments.add(getNextBuffer());
      
      final BlockChannelReader inReader = this.ioManager.createBlockChannelReader(p.getBuildSideChannel().getChannelID());
      final ChannelReaderInputView inView = new HeaderlessChannelReaderInputView(inReader, segments,
            p.getBuildSideBlockCount(), p.getLastSegmentLimit(), false);
      final ChannelReaderInputViewIterator<BT> inIter = new ChannelReaderInputViewIterator<BT>(inView, 
          this.availableMemory, this.buildSideSerializer);
      final TypeComparator<BT> btComparator = this.buildSideComparator;
      BT rec = this.buildSideSerializer.createInstance();

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      if (this.externalInView != null) {
        this.externalInView.close();
      }
      
      final BlockChannelReader reader = this.ioManager.createBlockChannelReader(this.writer.getChannelID());
      this.externalInView = new HeaderlessChannelReaderInputView(reader, this.fullSegments, this.blockCount, this.numBytesInLastSegment, false);
      return this.externalInView;
    }
  }

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