Package org.apache.flink.api.common.operators

Examples of org.apache.flink.api.common.operators.Ordering

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        .field(IntValue.class, 0)
        .field(IntValue.class, 1)
        .field(IntValue.class, 2);

      sink.setGlobalOrder(
        new Ordering(0, IntValue.class, Order.DESCENDING)
          .appendOrdering(1, IntValue.class, Order.ASCENDING)
          .appendOrdering(2, IntValue.class, Order.DESCENDING),
        new TripleIntDistribution(Order.DESCENDING, Order.ASCENDING, Order.DESCENDING));
      sink.setInput(source);
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    } else {
      useCombiner = isCombineable();
    }
   
    // check if we can work with a grouping (simple reducer), or if we need ordering because of a group order
    Ordering groupOrder = null;
    if (getPactContract() instanceof GroupReduceOperatorBase) {
      groupOrder = ((GroupReduceOperatorBase<?, ?, ?>) getPactContract()).getGroupOrder();
      if (groupOrder != null && groupOrder.getNumberOfFields() == 0) {
        groupOrder = null;
      }
    }
   
    OperatorDescriptorSingle props = useCombiner ?
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    ReduceOperator reducer = ReduceOperator.builder(CheckingReducer.class)
      .keyField(IntValue.class, 0)
      .input(source)
      .name("Ordered Reducer")
      .build();
    reducer.setGroupOrder(new Ordering(1, IntValue.class, Order.ASCENDING));
   
    FileDataSink sink = new FileDataSink(CsvOutputFormat.class, this.resultPath, reducer, "Sink");
    CsvOutputFormat.configureRecordFormat(sink)
      .recordDelimiter('\n')
      .fieldDelimiter(',')
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        .recordDelimiter('\n')
        .fieldDelimiter('|')
        .lenient(true)
        .field(IntValue.class, 0);
     
      sink.setGlobalOrder(new Ordering(0, IntValue.class, Order.ASCENDING), new UniformIntegerDistribution(Integer.MIN_VALUE, Integer.MAX_VALUE));
      sink.setInput(source);
     
      return new Plan(sink);
    }
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        SortedGrouping<IN> sortedGrouper = (SortedGrouping<IN>) grouper;
               
        int[] sortKeyPositions = sortedGrouper.getGroupSortKeyPositions();
        Order[] sortOrders = sortedGrouper.getGroupSortOrders();
       
        Ordering o = new Ordering();
        for(int i=0; i < sortKeyPositions.length; i++) {
          o.appendOrdering(sortKeyPositions[i], null, sortOrders[i]);
        }
        po.setGroupOrder(o);
      }
     
      return po;
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  public void testReduceWithGroupOrder() {
    // construct the plan
    FileDataSource source = new FileDataSource(new DummyInputFormat(), IN_FILE, "Source");
   
    ReduceOperator reduce = ReduceOperator.builder(new IdentityReduce()).keyField(IntValue.class, 2).name("Reduce").input(source).build();
    Ordering groupOrder = new Ordering(5, StringValue.class, Order.DESCENDING);
    reduce.setGroupOrder(groupOrder);
   
    FileDataSink sink = new FileDataSink(new DummyOutputFormat(), OUT_FILE, reduce, "Sink");
   
   
    Plan plan = new Plan(sink, "Test Temp Task");
    plan.setDefaultParallelism(DEFAULT_PARALLELISM);
   
    OptimizedPlan oPlan;
    try {
      oPlan = compileNoStats(plan);
    } catch(CompilerException ce) {
      ce.printStackTrace();
      fail("The pact compiler is unable to compile this plan correctly.");
      return; // silence the compiler
    }
   
    OptimizerPlanNodeResolver resolver = getOptimizerPlanNodeResolver(oPlan);
    SinkPlanNode sinkNode = resolver.getNode("Sink");
    SingleInputPlanNode reducer = resolver.getNode("Reduce");
   
    // verify the strategies
    Assert.assertEquals(ShipStrategyType.FORWARD, sinkNode.getInput().getShipStrategy());
    Assert.assertEquals(ShipStrategyType.PARTITION_HASH, reducer.getInput().getShipStrategy());
   
    Channel c = reducer.getInput();
    Assert.assertEquals(LocalStrategy.SORT, c.getLocalStrategy());
   
    FieldList ship = new FieldList(2);
    FieldList local = new FieldList(2, 5);
    Assert.assertEquals(ship, c.getShipStrategyKeys());
    Assert.assertEquals(local, c.getLocalStrategyKeys());
    Assert.assertTrue(c.getLocalStrategySortOrder()[0] == reducer.getSortOrders(0)[0]);
   
    // check that we indeed sort descending
    Assert.assertTrue(c.getLocalStrategySortOrder()[1] == groupOrder.getFieldSortDirections()[0]);
  }
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    CoGroupOperator coGroup = CoGroupOperator.builder(new DummyCoGroupStub(), IntValue.class, 3, 6)
        .keyField(LongValue.class, 0, 0)
        .name("CoGroup").input1(source1).input2(source2).build();
   
    Ordering groupOrder1 = new Ordering(5, StringValue.class, Order.DESCENDING);
    Ordering groupOrder2 = new Ordering(1, StringValue.class, Order.DESCENDING);
    groupOrder2.appendOrdering(4, DoubleValue.class, Order.ASCENDING);
    coGroup.setGroupOrderForInputOne(groupOrder1);
    coGroup.setGroupOrderForInputTwo(groupOrder2);
   
    FileDataSink sink = new FileDataSink(new DummyOutputFormat(), OUT_FILE, coGroup, "Sink");
   
    Plan plan = new Plan(sink, "Reduce Group Order Test");
    plan.setDefaultParallelism(DEFAULT_PARALLELISM);
   
    OptimizedPlan oPlan;
    try {
      oPlan = compileNoStats(plan);
    } catch(CompilerException ce) {
      ce.printStackTrace();
      fail("The pact compiler is unable to compile this plan correctly.");
      return; // silence the compiler
    }
   
    OptimizerPlanNodeResolver resolver = getOptimizerPlanNodeResolver(oPlan);
    SinkPlanNode sinkNode = resolver.getNode("Sink");
    DualInputPlanNode coGroupNode = resolver.getNode("CoGroup");
   
    // verify the strategies
    Assert.assertEquals(ShipStrategyType.FORWARD, sinkNode.getInput().getShipStrategy());
    Assert.assertEquals(ShipStrategyType.PARTITION_HASH, coGroupNode.getInput1().getShipStrategy());
    Assert.assertEquals(ShipStrategyType.PARTITION_HASH, coGroupNode.getInput2().getShipStrategy());
   
    Channel c1 = coGroupNode.getInput1();
    Channel c2 = coGroupNode.getInput2();
   
    Assert.assertEquals(LocalStrategy.SORT, c1.getLocalStrategy());
    Assert.assertEquals(LocalStrategy.SORT, c2.getLocalStrategy());
   
    FieldList ship1 = new FieldList(new int[] {3, 0});
    FieldList ship2 = new FieldList(new int[] {6, 0});
   
    FieldList local1 = new FieldList(new int[] {3, 0, 5});
    FieldList local2 = new FieldList(new int[] {6, 0, 1, 4});
   
    Assert.assertEquals(ship1, c1.getShipStrategyKeys());
    Assert.assertEquals(ship2, c2.getShipStrategyKeys());
    Assert.assertEquals(local1, c1.getLocalStrategyKeys());
    Assert.assertEquals(local2, c2.getLocalStrategyKeys());
   
    Assert.assertTrue(c1.getLocalStrategySortOrder()[0] == coGroupNode.getSortOrders()[0]);
    Assert.assertTrue(c1.getLocalStrategySortOrder()[1] == coGroupNode.getSortOrders()[1]);
    Assert.assertTrue(c2.getLocalStrategySortOrder()[0] == coGroupNode.getSortOrders()[0]);
    Assert.assertTrue(c2.getLocalStrategySortOrder()[1] == coGroupNode.getSortOrders()[1]);
   
    // check that the local group orderings are correct
    Assert.assertTrue(c1.getLocalStrategySortOrder()[2] == groupOrder1.getFieldSortDirections()[0]);
    Assert.assertTrue(c2.getLocalStrategySortOrder()[2] == groupOrder2.getFieldSortDirections()[0]);
    Assert.assertTrue(c2.getLocalStrategySortOrder()[3] == groupOrder2.getFieldSortDirections()[1]);
  }
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Related Classes of org.apache.flink.api.common.operators.Ordering

  • org.apache.flink.api.java.operators.GroupReduceOperator
  • org.apache.flink.compiler.dag.CoGroupNode
  • org.apache.flink.compiler.dag.DataSinkNode
  • org.apache.flink.compiler.dag.GroupReduceNode
  • org.apache.flink.compiler.dataproperties.LocalProperties
  • org.apache.flink.compiler.FeedbackPropertiesMatchTest
  • org.apache.flink.compiler.GroupOrderTest
  • org.apache.flink.compiler.operators.CoGroupDescriptor
  • org.apache.flink.compiler.operators.GroupReduceProperties
  • org.apache.flink.compiler.operators.GroupReduceWithCombineProperties
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