Exemplo n.º 1
0
  private static Integer createDownStreamId(ConnectedDataStream dataStream) {
    SingleOutputStreamOperator coMap =
        dataStream.map(
            new CoMapFunction<Tuple2<Long, Long>, Tuple2<Long, Long>, Object>() {
              @Override
              public Object map1(Tuple2<Long, Long> value) {
                return null;
              }

              @Override
              public Object map2(Tuple2<Long, Long> value) {
                return null;
              }
            });
    coMap.addSink(new NoOpSink());
    return coMap.getId();
  }
Exemplo n.º 2
0
  @SuppressWarnings("rawtypes,unchecked")
  private static Integer createDownStreamId(ConnectedStreams dataStream) {
    SingleOutputStreamOperator<?, ?> coMap =
        dataStream.map(
            new CoMapFunction<Tuple2<Long, Long>, Tuple2<Long, Long>, Object>() {
              private static final long serialVersionUID = 1L;

              @Override
              public Object map1(Tuple2<Long, Long> value) {
                return null;
              }

              @Override
              public Object map2(Tuple2<Long, Long> value) {
                return null;
              }
            });
    coMap.addSink(new NoOpSink());
    return coMap.getId();
  }
Exemplo n.º 3
0
  /** Tests whether parallelism gets set. */
  @Test
  public void testParallelism() {
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

    DataStreamSource<Tuple2<Long, Long>> src = env.fromElements(new Tuple2<>(0L, 0L));
    env.setParallelism(10);

    SingleOutputStreamOperator<Long, ?> map =
        src.map(
                new MapFunction<Tuple2<Long, Long>, Long>() {
                  @Override
                  public Long map(Tuple2<Long, Long> value) throws Exception {
                    return null;
                  }
                })
            .name("MyMap");

    DataStream<Long> windowed =
        map.windowAll(GlobalWindows.create())
            .trigger(PurgingTrigger.of(CountTrigger.of(10)))
            .fold(
                0L,
                new FoldFunction<Long, Long>() {
                  @Override
                  public Long fold(Long accumulator, Long value) throws Exception {
                    return null;
                  }
                });

    windowed.addSink(new NoOpSink<Long>());

    DataStreamSink<Long> sink =
        map.addSink(
            new SinkFunction<Long>() {
              private static final long serialVersionUID = 1L;

              @Override
              public void invoke(Long value) throws Exception {}
            });

    assertEquals(1, env.getStreamGraph().getStreamNode(src.getId()).getParallelism());
    assertEquals(10, env.getStreamGraph().getStreamNode(map.getId()).getParallelism());
    assertEquals(1, env.getStreamGraph().getStreamNode(windowed.getId()).getParallelism());
    assertEquals(
        10, env.getStreamGraph().getStreamNode(sink.getTransformation().getId()).getParallelism());

    env.setParallelism(7);

    // Some parts, such as windowing rely on the fact that previous operators have a parallelism
    // set when instantiating the Discretizer. This would break if we dynamically changed
    // the parallelism of operations when changing the setting on the Execution Environment.
    assertEquals(1, env.getStreamGraph().getStreamNode(src.getId()).getParallelism());
    assertEquals(10, env.getStreamGraph().getStreamNode(map.getId()).getParallelism());
    assertEquals(1, env.getStreamGraph().getStreamNode(windowed.getId()).getParallelism());
    assertEquals(
        10, env.getStreamGraph().getStreamNode(sink.getTransformation().getId()).getParallelism());

    try {
      src.setParallelism(3);
      fail();
    } catch (IllegalArgumentException success) {
      // do nothing
    }

    DataStreamSource<Long> parallelSource = env.generateSequence(0, 0);
    parallelSource.addSink(new NoOpSink<Long>());
    assertEquals(7, env.getStreamGraph().getStreamNode(parallelSource.getId()).getParallelism());

    parallelSource.setParallelism(3);
    assertEquals(3, env.getStreamGraph().getStreamNode(parallelSource.getId()).getParallelism());

    map.setParallelism(2);
    assertEquals(2, env.getStreamGraph().getStreamNode(map.getId()).getParallelism());

    sink.setParallelism(4);
    assertEquals(
        4, env.getStreamGraph().getStreamNode(sink.getTransformation().getId()).getParallelism());
  }