Examples with SimpleCondition org.apache.flink.cep.pattern.conditions.SimpleCondition used on opensource projects

Example 11 with SimpleCondition

use of org.apache.flink.cep.pattern.conditions.SimpleCondition in project flink by apache.

the class GroupITCase method testFollowedByGroupTimesOptional.

@Test
public void testFollowedByGroupTimesOptional() throws Exception {
    List<StreamRecord<Event>> inputEvents = new ArrayList<>();
    Event c = new Event(40, "c", 1.0);
    Event a = new Event(41, "a", 2.0);
    Event d = new Event(45, "d", 3.0);
    inputEvents.add(new StreamRecord<>(c, 1));
    inputEvents.add(new StreamRecord<>(a, 2));
    inputEvents.add(new StreamRecord<>(d, 3));
    // c (a b){2}? d
    Pattern<Event, ?> pattern = Pattern.<Event>begin("start").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("c");
        }
    }).followedBy(Pattern.<Event>begin("middle1").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("a");
        }
    }).followedBy("middle2").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("b");
        }
    })).times(2).optional().followedBy("end").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("d");
        }
    });
    NFA<Event> nfa = compile(pattern, false);
    final List<List<Event>> resultingPatterns = feedNFA(inputEvents, nfa);
    comparePatterns(resultingPatterns, Lists.<List<Event>>newArrayList(Lists.newArrayList(c, d)));
}

Example 12 with SimpleCondition

use of org.apache.flink.cep.pattern.conditions.SimpleCondition in project flink by apache.

the class NFAITCase method testTimesClearingBuffer.

// /////////////////////////////     Clearing SharedBuffer
// ////////////////////////////////////////
@Test
public void testTimesClearingBuffer() throws Exception {
    Event startEvent = new Event(40, "c", 1.0);
    Event middleEvent1 = new Event(41, "a", 2.0);
    Event middleEvent2 = new Event(42, "a", 3.0);
    Event middleEvent3 = new Event(43, "a", 4.0);
    Event end1 = new Event(44, "b", 5.0);
    Pattern<Event, ?> pattern = Pattern.<Event>begin("start").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("c");
        }
    }).next("middle").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("a");
        }
    }).times(2).followedBy("end1").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("b");
        }
    }).within(Time.milliseconds(8));
    NFA<Event> nfa = compile(pattern, false);
    NFAState nfaState = nfa.createInitialNFAState();
    NFATestHarness nfaTestHarness = NFATestHarness.forNFA(nfa).withNFAState(nfaState).build();
    nfaTestHarness.feedRecord(new StreamRecord<>(startEvent, 1));
    nfaTestHarness.feedRecord(new StreamRecord<>(middleEvent1, 2));
    nfaTestHarness.feedRecord(new StreamRecord<>(middleEvent2, 3));
    nfaTestHarness.feedRecord(new StreamRecord<>(middleEvent3, 4));
    nfaTestHarness.feedRecord(new StreamRecord<>(end1, 6));
    // pruning element
    nfa.advanceTime(sharedBufferAccessor, nfaState, 10);
    assertEquals(1, nfaState.getPartialMatches().size());
    assertEquals("start", nfaState.getPartialMatches().peek().getCurrentStateName());
}

Example 13 with SimpleCondition

use of org.apache.flink.cep.pattern.conditions.SimpleCondition in project flink by apache.

the class CEPITCase method testSimpleAfterMatchSkip.

@Test
public void testSimpleAfterMatchSkip() throws Exception {
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(envConfiguration);
    DataStream<Tuple2<Integer, String>> input = env.fromElements(new Tuple2<>(1, "a"), new Tuple2<>(2, "a"), new Tuple2<>(3, "a"), new Tuple2<>(4, "a"));
    Pattern<Tuple2<Integer, String>, ?> pattern = Pattern.<Tuple2<Integer, String>>begin("start", AfterMatchSkipStrategy.skipPastLastEvent()).where(new SimpleCondition<Tuple2<Integer, String>>() {

        @Override
        public boolean filter(Tuple2<Integer, String> rec) throws Exception {
            return rec.f1.equals("a");
        }
    }).times(2);
    PatternStream<Tuple2<Integer, String>> pStream = CEP.pattern(input, pattern).inProcessingTime();
    DataStream<Tuple2<Integer, String>> result = pStream.select(new PatternSelectFunction<Tuple2<Integer, String>, Tuple2<Integer, String>>() {

        @Override
        public Tuple2<Integer, String> select(Map<String, List<Tuple2<Integer, String>>> pattern) throws Exception {
            return pattern.get("start").get(0);
        }
    });
    List<Tuple2<Integer, String>> resultList = new ArrayList<>();
    DataStreamUtils.collect(result).forEachRemaining(resultList::add);
    resultList.sort(Comparator.comparing(tuple2 -> tuple2.toString()));
    List<Tuple2<Integer, String>> expected = Arrays.asList(Tuple2.of(1, "a"), Tuple2.of(3, "a"));
    assertEquals(expected, resultList);
}

Example 14 with SimpleCondition

use of org.apache.flink.cep.pattern.conditions.SimpleCondition in project flink by apache.

the class AfterMatchSkipITCase method testSkipPastLastWithOneOrMoreAtBeginning.

/**
 * Example from docs.
 */
@Test
public void testSkipPastLastWithOneOrMoreAtBeginning() throws Exception {
    List<StreamRecord<Event>> streamEvents = new ArrayList<>();
    Event a1 = new Event(1, "a1", 0.0);
    Event a2 = new Event(2, "a2", 0.0);
    Event a3 = new Event(3, "a3", 0.0);
    Event b1 = new Event(4, "b1", 0.0);
    streamEvents.add(new StreamRecord<>(a1));
    streamEvents.add(new StreamRecord<>(a2));
    streamEvents.add(new StreamRecord<>(a3));
    streamEvents.add(new StreamRecord<>(b1));
    Pattern<Event, ?> pattern = Pattern.<Event>begin("a", AfterMatchSkipStrategy.skipPastLastEvent()).where(new SimpleCondition<Event>() {

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().contains("a");
        }
    }).oneOrMore().consecutive().greedy().next("b").where(new SimpleCondition<Event>() {

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().contains("b");
        }
    });
    NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();
    List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);
    comparePatterns(resultingPatterns, Collections.singletonList(Lists.newArrayList(a1, a2, a3, b1)));
}

Example 15 with SimpleCondition

use of org.apache.flink.cep.pattern.conditions.SimpleCondition in project flink by apache.

the class GreedyITCase method testGreedyUntilOneOrMoreWithDummyEventsBeforeQuantifier.

@Test
public void testGreedyUntilOneOrMoreWithDummyEventsBeforeQuantifier() throws Exception {
    List<StreamRecord<Event>> inputEvents = new ArrayList<>();
    Event c = new Event(40, "c", 1.0);
    Event a1 = new Event(41, "a", 2.0);
    Event a2 = new Event(42, "a", 3.0);
    Event a3 = new Event(43, "a", 3.0);
    Event d = new Event(45, "d", 3.0);
    inputEvents.add(new StreamRecord<>(c, 1));
    inputEvents.add(new StreamRecord<>(new Event(44, "a", 4.0), 2));
    inputEvents.add(new StreamRecord<>(a1, 3));
    inputEvents.add(new StreamRecord<>(a2, 4));
    inputEvents.add(new StreamRecord<>(a3, 5));
    inputEvents.add(new StreamRecord<>(d, 6));
    // c a+ d
    Pattern<Event, ?> pattern = Pattern.<Event>begin("start").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("c");
        }
    }).followedBy("middle").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("a");
        }
    }).oneOrMore().greedy().until(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getPrice() > 3.0;
        }
    }).followedBy("end").where(new SimpleCondition<Event>() {

        private static final long serialVersionUID = 5726188262756267490L;

        @Override
        public boolean filter(Event value) throws Exception {
            return value.getName().equals("d");
        }
    });
    NFA<Event> nfa = compile(pattern, false);
    final List<List<Event>> resultingPatterns = feedNFA(inputEvents, nfa);
    comparePatterns(resultingPatterns, Lists.<List<Event>>newArrayList());
}