Examples with IndexOutputEmitter edu.snu.mist.core.utils.IndexOutputEmitter used on opensource projects

Example 1 with IndexOutputEmitter

use of edu.snu.mist.core.utils.IndexOutputEmitter in project mist by snuspl.

the class ConditionalBranchOperatorTest method testConditionalBranchOperator.

/**
 * Test conditional branch operation.
 * It classifies the input string according to it's length.
 */
@Test
public void testConditionalBranchOperator() throws InjectionException {
    // input stream events
    final MistDataEvent d1 = new MistDataEvent("1", 1L);
    final MistDataEvent d2 = new MistDataEvent("22", 2L);
    final MistDataEvent d3 = new MistDataEvent("333", 3L);
    final MistDataEvent d4 = new MistDataEvent("4444", 4L);
    final MistDataEvent d5 = new MistDataEvent("55555", 5L);
    final MistWatermarkEvent w1 = new MistWatermarkEvent(6L);
    // classify the string according to it's length
    final List<MISTPredicate<String>> predicates = new ArrayList<>();
    // "1" will be passed with index 1
    predicates.add((input) -> input.length() < 2);
    // "22" will be passed with index 2
    predicates.add((input) -> input.length() < 3);
    // "333", "4444" will be passed with index 3
    predicates.add((input) -> input.length() < 5);
    // "55555" will not be passed
    final List<Tuple<MistEvent, Integer>> result = new LinkedList<>();
    final ConditionalBranchOperator<String> conditionalBranchOperator = new ConditionalBranchOperator<>(predicates);
    conditionalBranchOperator.setOutputEmitter(new IndexOutputEmitter(result));
    conditionalBranchOperator.processLeftData(d1);
    conditionalBranchOperator.processLeftData(d2);
    conditionalBranchOperator.processLeftData(d3);
    conditionalBranchOperator.processLeftData(d4);
    conditionalBranchOperator.processLeftData(d5);
    conditionalBranchOperator.processLeftWatermark(w1);
    Assert.assertEquals(5, result.size());
    Assert.assertEquals(new Tuple<>(d1, 1), result.get(0));
    Assert.assertEquals(new Tuple<>(d2, 2), result.get(1));
    Assert.assertEquals(new Tuple<>(d3, 3), result.get(2));
    Assert.assertEquals(new Tuple<>(d4, 3), result.get(3));
    Assert.assertEquals(new Tuple<>(w1, 0), result.get(4));
}