Examples with MistDataEvent edu.snu.mist.core.MistDataEvent used on opensource projects

Example 21 with MistDataEvent

use of edu.snu.mist.core.MistDataEvent in project mist by snuspl.

the class FlatMapOperator method processLeftData.

/**
 * FlatMaps the list of outputs.
 */
@Override
public void processLeftData(final MistDataEvent input) {
    final I value = (I) input.getValue();
    final List<O> outputs = flatMapFunc.apply(value);
    if (LOG.isLoggable(Level.FINE)) {
        LOG.log(Level.FINE, "{0} FlatMaps {1} to {2}", new Object[] { FlatMapOperator.class, input, outputs });
    }
    for (final O output : outputs) {
        final MistDataEvent event = new MistDataEvent(output, input.getTimestamp());
        outputEmitter.emitData(event);
    }
}

Example 22 with MistDataEvent

use of edu.snu.mist.core.MistDataEvent 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"));
}

Example 23 with MistDataEvent

use of edu.snu.mist.core.MistDataEvent in project mist by snuspl.

the class StateTransitionOperatorTest method testStateTransitionOperatorSetState.

/**
 * Test setting state of StateTransitionOperator.
 */
@Test
public void testStateTransitionOperatorSetState() throws InterruptedException {
    // Generate a new state and set it to StateTransitionOperator.
    final String newFunctionState = "1";
    final Map<String, Object> loadStateMap = new HashMap<>();
    loadStateMap.put("stateTransitionOperatorState", newFunctionState);
    // generate a set of final states
    final Set<String> finalSet = new HashSet<>();
    finalSet.add("2");
    finalSet.add("3");
    // generate a state table
    final Map<String, Collection<Tuple2<MISTPredicate, String>>> stateTable = new HashMap<>();
    final Collection<Tuple2<MISTPredicate, String>> list1 = new ArrayList<>();
    list1.add(new Tuple2<>(new RuleBasedEQPredicate("number", 2), "2"));
    final Collection<Tuple2<MISTPredicate, String>> list2 = new ArrayList<>();
    list2.add(new Tuple2<>(new RuleBasedEQPredicate("number", 3), "3"));
    stateTable.put("1", list1);
    stateTable.put("2", list2);
    final StateTransitionOperator stateTransitionOperator = new StateTransitionOperator("0", finalSet, stateTable);
    stateTransitionOperator.setState(loadStateMap);
    // Get the current StateTransitionOperator's state.
    final Map<String, Object> operatorState = stateTransitionOperator.getStateSnapshot();
    final String stateTransitionOperatorState = (String) operatorState.get("stateTransitionOperatorState");
    // Compare the original and the set operator
    Assert.assertEquals(newFunctionState, stateTransitionOperatorState);
    // Test if the operator can properly process data.
    final List<MistEvent> result = new LinkedList<>();
    stateTransitionOperator.setOutputEmitter(new OutputBufferEmitter(result));
    // expected result: 2--3
    // generate input data event
    final Map<String, Integer> value2 = new HashMap<>();
    value2.put("number", 2);
    final MistDataEvent data2 = new MistDataEvent(value2, 0L);
    final Map<String, Integer> value3 = new HashMap<>();
    value3.put("number", 3);
    final MistDataEvent data3 = new MistDataEvent(value3, 1L);
    stateTransitionOperator.processLeftData(data2);
    Assert.assertEquals(1, result.size());
    Assert.assertEquals(data2, result.get(0));
    Assert.assertEquals("2", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
    stateTransitionOperator.processLeftData(data3);
    Assert.assertEquals(2, result.size());
    Assert.assertEquals(data3, result.get(1));
    Assert.assertEquals("3", stateTransitionOperator.getStateSnapshot().get("stateTransitionOperatorState"));
}

Example 24 with MistDataEvent

use of edu.snu.mist.core.MistDataEvent in project mist by snuspl.

the class StatelessOperatorTest method testFilterOperator.

/**
 * Test filter operator.
 * It filters string values which start with "a".
 */
@Test
public void testFilterOperator() throws InjectionException {
    // input stream
    final List<MistDataEvent> inputStream = ImmutableList.of(new MistDataEvent("alpha", 1L), new MistDataEvent("gamma", 2L), new MistDataEvent("bravo", 3L), new MistDataEvent("area", 4L), new MistDataEvent("charlie", 5L), new MistDataEvent("delta", 6L), new MistDataEvent("application", 7L), new MistDataEvent("echo", 8L), new MistDataEvent("ally", 9L), new MistDataEvent("foxtrot", 10L));
    // expected output
    final List<MistEvent> expectedStream = ImmutableList.of(new MistDataEvent("alpha", 1L), new MistDataEvent("area", 4L), new MistDataEvent("application", 7L), new MistDataEvent("ally", 9L));
    // create a filter function
    final MISTPredicate<String> filterFunc = (input) -> input.startsWith("a");
    final FilterOperator<String> filterOperator = new FilterOperator<>(filterFunc);
    testStatelessOperator(inputStream, expectedStream, filterOperator);
}

Example 25 with MistDataEvent

use of edu.snu.mist.core.MistDataEvent in project mist by snuspl.

the class UnionOperatorTest method testUnionOperator.

/**
 * Test union operation.
 * It merges two streams into one. (ordered by timestamp)
 */
@Test
public void testUnionOperator() throws InjectionException {
    // input stream events
    final MistDataEvent a = new MistDataEvent("a", 1L);
    final MistDataEvent b = new MistDataEvent("b", 3L);
    final MistDataEvent c = new MistDataEvent("c", 5L);
    final MistWatermarkEvent lw1 = new MistWatermarkEvent(9L);
    final MistWatermarkEvent lw2 = new MistWatermarkEvent(10L);
    final MistDataEvent d = new MistDataEvent("d", 1L);
    final MistDataEvent e = new MistDataEvent("e", 2L);
    final MistDataEvent f = new MistDataEvent("f", 4L);
    final MistWatermarkEvent rw1 = new MistWatermarkEvent(3L);
    final MistDataEvent g = new MistDataEvent("g", 6L);
    final MistWatermarkEvent rw2 = new MistWatermarkEvent(11L);
    final UnionOperator unionOperator = new UnionOperator();
    final List<MistEvent> result = new LinkedList<>();
    unionOperator.setOutputEmitter(new OutputBufferEmitter(result));
    // Test:
    // * Left: ----------W:10--W:9--c----b--------a---->
    // * Right -W:11 --g--------------W:3--f--e--d------>
    // Merged stream: ----g--c--f--b--e--d--a-->
    unionOperator.processLeftData(a);
    Assert.assertEquals(0, result.size());
    unionOperator.processRightData(d);
    Assert.assertEquals(2, result.size());
    Assert.assertEquals(a, result.get(0));
    Assert.assertEquals(d, result.get(1));
    unionOperator.processRightData(e);
    unionOperator.processRightData(f);
    Assert.assertEquals(2, result.size());
    unionOperator.processLeftData(b);
    Assert.assertEquals(4, result.size());
    Assert.assertEquals(e, result.get(2));
    Assert.assertEquals(b, result.get(3));
    unionOperator.processRightWatermark(rw1);
    Assert.assertEquals(5, result.size());
    Assert.assertEquals(rw1, result.get(4));
    unionOperator.processLeftData(c);
    Assert.assertEquals(6, result.size());
    Assert.assertEquals(f, result.get(5));
    unionOperator.processLeftWatermark(lw1);
    Assert.assertEquals(6, result.size());
    unionOperator.processLeftWatermark(lw2);
    Assert.assertEquals(6, result.size());
    unionOperator.processRightData(g);
    Assert.assertEquals(8, result.size());
    Assert.assertEquals(c, result.get(6));
    Assert.assertEquals(g, result.get(7));
    unionOperator.processRightWatermark(rw2);
    Assert.assertEquals(9, result.size());
    Assert.assertEquals(lw2, result.get(8));
}