Examples with SingleInputUdfOperator org.apache.flink.api.java.operators.SingleInputUdfOperator used on opensource projects

Example 1 with SingleInputUdfOperator

use of org.apache.flink.api.java.operators.SingleInputUdfOperator in project flink by apache.

the class GSATranslationTest method testTranslation.

@Test
public void testTranslation() {
    try {
        final String ITERATION_NAME = "Test Name";
        final String AGGREGATOR_NAME = "AggregatorName";
        final String BC_SET_GATHER_NAME = "gather messages";
        final String BC_SET_SUM_NAME = "sum updates";
        final String BC_SET_APLLY_NAME = "apply updates";
        final int NUM_ITERATIONS = 13;
        final int ITERATION_parallelism = 77;
        ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
        DataSet<Long> bcGather = env.fromElements(1L);
        DataSet<Long> bcSum = env.fromElements(1L);
        DataSet<Long> bcApply = env.fromElements(1L);
        DataSet<Vertex<Long, Long>> result;
        // ------------ construct the test program ------------------
        {
            DataSet<Edge<Long, NullValue>> edges = env.fromElements(new Tuple3<>(1L, 2L, NullValue.getInstance())).map(new Tuple3ToEdgeMap<Long, NullValue>());
            Graph<Long, Long, NullValue> graph = Graph.fromDataSet(edges, new InitVertices(), env);
            GSAConfiguration parameters = new GSAConfiguration();
            parameters.registerAggregator(AGGREGATOR_NAME, new LongSumAggregator());
            parameters.setName(ITERATION_NAME);
            parameters.setParallelism(ITERATION_parallelism);
            parameters.addBroadcastSetForGatherFunction(BC_SET_GATHER_NAME, bcGather);
            parameters.addBroadcastSetForSumFunction(BC_SET_SUM_NAME, bcSum);
            parameters.addBroadcastSetForApplyFunction(BC_SET_APLLY_NAME, bcApply);
            result = graph.runGatherSumApplyIteration(new GatherNeighborIds(), new SelectMinId(), new UpdateComponentId(), NUM_ITERATIONS, parameters).getVertices();
            result.output(new DiscardingOutputFormat<Vertex<Long, Long>>());
        }
        // ------------- validate the java program ----------------
        assertTrue(result instanceof DeltaIterationResultSet);
        DeltaIterationResultSet<?, ?> resultSet = (DeltaIterationResultSet<?, ?>) result;
        DeltaIteration<?, ?> iteration = resultSet.getIterationHead();
        // check the basic iteration properties
        assertEquals(NUM_ITERATIONS, resultSet.getMaxIterations());
        assertArrayEquals(new int[] { 0 }, resultSet.getKeyPositions());
        assertEquals(ITERATION_parallelism, iteration.getParallelism());
        assertEquals(ITERATION_NAME, iteration.getName());
        assertEquals(AGGREGATOR_NAME, iteration.getAggregators().getAllRegisteredAggregators().iterator().next().getName());
        // validate that the semantic properties are set as they should
        TwoInputUdfOperator<?, ?, ?, ?> solutionSetJoin = (TwoInputUdfOperator<?, ?, ?, ?>) resultSet.getNextWorkset();
        assertTrue(solutionSetJoin.getSemanticProperties().getForwardingTargetFields(0, 0).contains(0));
        assertTrue(solutionSetJoin.getSemanticProperties().getForwardingTargetFields(1, 0).contains(0));
        SingleInputUdfOperator<?, ?, ?> sumReduce = (SingleInputUdfOperator<?, ?, ?>) solutionSetJoin.getInput1();
        SingleInputUdfOperator<?, ?, ?> gatherMap = (SingleInputUdfOperator<?, ?, ?>) sumReduce.getInput();
        // validate that the broadcast sets are forwarded
        assertEquals(bcGather, gatherMap.getBroadcastSets().get(BC_SET_GATHER_NAME));
        assertEquals(bcSum, sumReduce.getBroadcastSets().get(BC_SET_SUM_NAME));
        assertEquals(bcApply, solutionSetJoin.getBroadcastSets().get(BC_SET_APLLY_NAME));
    } catch (Exception e) {
        System.err.println(e.getMessage());
        e.printStackTrace();
        fail(e.getMessage());
    }
}