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

Example 26 with OutputBufferEmitter

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

the class StateTransitionOperatorTest method testStateTransitionOperator.

/**
 * Test StateTransitionOperator.
 * Final states are "1" and "4".
 */
@Test
public void testStateTransitionOperator() throws InterruptedException {
    // input events
    // expected state transitions: 0 -- 1 -- 0 -- 3 -- 4, "1" and "4" are emitted.
    final Map<String, Integer> value1 = new HashMap<>();
    value1.put("number", 1);
    final MistDataEvent data1 = new MistDataEvent(value1, 0L);
    final Map<String, Integer> value2 = new HashMap<>();
    value2.put("number", 2);
    final MistDataEvent data2 = new MistDataEvent(value2, 1L);
    final MistWatermarkEvent watermarkEvent = new MistWatermarkEvent(7L);
    final Map<String, Integer> value3 = new HashMap<>();
    value3.put("number", 3);
    final MistDataEvent data3 = new MistDataEvent(value3, 10L);
    final Map<String, Integer> value4 = new HashMap<>();
    value4.put("number", 4);
    final MistDataEvent data4 = new MistDataEvent(value4, 11L);
    // make a set of final states
    final Set<String> finalSet = new HashSet<>();
    finalSet.add("1");
    finalSet.add("4");
    // make a state table
    final Map<String, Collection<Tuple2<MISTPredicate, String>>> stateTable = new HashMap<>();
    final Collection<Tuple2<MISTPredicate, String>> list0 = new ArrayList<>();
    list0.add(new Tuple2<>(new RuleBasedEQPredicate("number", 1), "1"));
    list0.add(new Tuple2<>(new RuleBasedEQPredicate("number", 3), "3"));
    final Collection<Tuple2<MISTPredicate, String>> list1 = new ArrayList<>();
    list1.add(new Tuple2<>(new RuleBasedEQPredicate("number", 2), "0"));
    final Collection<Tuple2<MISTPredicate, String>> list3 = new ArrayList<>();
    list3.add(new Tuple2<>(new RuleBasedEQPredicate("number", 4), "4"));
    stateTable.put("0", list0);
    stateTable.put("1", list1);
    stateTable.put("3", list3);
    // make a state transition operator
    final StateTransitionOperator stateTransitionOperator = new StateTransitionOperator("0", finalSet, stateTable);
    final List<MistEvent> result = new LinkedList<>();
    stateTransitionOperator.setOutputEmitter(new OutputBufferEmitter(result));
    stateTransitionOperator.processLeftData(data1);
    Assert.assertEquals(1, result.size());
    Assert.assertEquals(data1, result.get(0));
    Assert.assertEquals("1", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
    stateTransitionOperator.processLeftData(data2);
    Assert.assertEquals(1, result.size());
    Assert.assertEquals("0", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
    stateTransitionOperator.processLeftWatermark(watermarkEvent);
    Assert.assertEquals(2, result.size());
    Assert.assertEquals(watermarkEvent, result.get(1));
    Assert.assertEquals("0", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
    stateTransitionOperator.processLeftData(data3);
    Assert.assertEquals(2, result.size());
    Assert.assertEquals("3", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
    stateTransitionOperator.processLeftData(data4);
    Assert.assertEquals(3, result.size());
    Assert.assertEquals(data4, result.get(2));
    Assert.assertEquals("4", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
}