org.apache.flink.cep.pattern.conditions.SimpleCondition Java Examples

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Example #1
Source File: PatternTest.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testPatternWithSubtypingAndFilter() {
	Pattern<Event, Event> pattern = Pattern.<Event>begin("start").next("subevent").subtype(SubEvent.class).where(new SimpleCondition<SubEvent>() {
		private static final long serialVersionUID = -4118591291880230304L;

		@Override
		public boolean filter(SubEvent value) throws Exception {
			return false;
		}
	}).followedBy("end");

	Pattern<Event, ?> previous;
	Pattern<Event, ?> previous2;

	assertNotNull(previous = pattern.getPrevious());
	assertNotNull(previous2 = previous.getPrevious());
	assertNull(previous2.getPrevious());

	assertEquals(ConsumingStrategy.SKIP_TILL_NEXT, pattern.getQuantifier().getConsumingStrategy());
	assertNotNull(previous.getCondition());

	assertEquals(pattern.getName(), "end");
	assertEquals(previous.getName(), "subevent");
	assertEquals(previous2.getName(), "start");
}
Example #2
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testSharedBufferIsProperlyCleared() throws Exception {
	List<StreamRecord<Event>> inputEvents = new ArrayList<>();

	for (int i = 0; i < 4; i++) {
		inputEvents.add(new StreamRecord<>(new Event(1, "a", 1.0), i));
	}

	SkipPastLastStrategy matchSkipStrategy = AfterMatchSkipStrategy.skipPastLastEvent();
	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", matchSkipStrategy)
		.where(new SimpleCondition<Event>() {
			private static final long serialVersionUID = 5726188262756267490L;

			@Override
			public boolean filter(Event value) throws Exception {
				return true;
			}
		}).times(2);

	SharedBuffer<Event> sharedBuffer = TestSharedBuffer.createTestBuffer(Event.createTypeSerializer());
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).withSharedBuffer(sharedBuffer).build();

	nfaTestHarness.feedRecords(inputEvents);

	assertThat(sharedBuffer.isEmpty(), Matchers.is(true));
}
Example #3
Source File: PatternTest.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testPatternWithSubtypingAndFilter() {
	Pattern<Event, Event> pattern = Pattern.<Event>begin("start").next("subevent").subtype(SubEvent.class).where(new SimpleCondition<SubEvent>() {
		private static final long serialVersionUID = -4118591291880230304L;

		@Override
		public boolean filter(SubEvent value) throws Exception {
			return false;
		}
	}).followedBy("end");

	Pattern<Event, ?> previous;
	Pattern<Event, ?> previous2;

	assertNotNull(previous = pattern.getPrevious());
	assertNotNull(previous2 = previous.getPrevious());
	assertNull(previous2.getPrevious());

	assertEquals(ConsumingStrategy.SKIP_TILL_NEXT, pattern.getQuantifier().getConsumingStrategy());
	assertNotNull(previous.getCondition());

	assertEquals(pattern.getName(), "end");
	assertEquals(previous.getName(), "subevent");
	assertEquals(previous2.getName(), "start");
}
Example #4
Source File: AfterMatchSkipITCase.java    From Flink-CEPplus with Apache License 2.0 6 votes vote down vote up 
@Test
public void testSharedBufferIsProperlyCleared() throws Exception {
	List<StreamRecord<Event>> inputEvents = new ArrayList<>();

	for (int i = 0; i < 4; i++) {
		inputEvents.add(new StreamRecord<>(new Event(1, "a", 1.0), i));
	}

	SkipPastLastStrategy matchSkipStrategy = AfterMatchSkipStrategy.skipPastLastEvent();
	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", matchSkipStrategy)
		.where(new SimpleCondition<Event>() {
			private static final long serialVersionUID = 5726188262756267490L;

			@Override
			public boolean filter(Event value) throws Exception {
				return true;
			}
		}).times(2);

	SharedBuffer<Event> sharedBuffer = TestSharedBuffer.createTestBuffer(Event.createTypeSerializer());
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).withSharedBuffer(sharedBuffer).build();

	nfaTestHarness.feedRecords(inputEvents);

	assertThat(sharedBuffer.isEmpty(), Matchers.is(true));
}
Example #5
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 6 votes vote down vote up 
@Test
public void testSharedBufferIsProperlyCleared() throws Exception {
	List<StreamRecord<Event>> inputEvents = new ArrayList<>();

	for (int i = 0; i < 4; i++) {
		inputEvents.add(new StreamRecord<>(new Event(1, "a", 1.0), i));
	}

	SkipPastLastStrategy matchSkipStrategy = AfterMatchSkipStrategy.skipPastLastEvent();
	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", matchSkipStrategy)
		.where(new SimpleCondition<Event>() {
			private static final long serialVersionUID = 5726188262756267490L;

			@Override
			public boolean filter(Event value) throws Exception {
				return true;
			}
		}).times(2);

	SharedBuffer<Event> sharedBuffer = TestSharedBuffer.createTestBuffer(Event.createTypeSerializer());
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).withSharedBuffer(sharedBuffer).build();

	nfaTestHarness.feedRecords(inputEvents);

	assertThat(sharedBuffer.isEmpty(), Matchers.is(true));
}
Example #6
Source File: PatternTest.java    From Flink-CEPplus with Apache License 2.0 6 votes vote down vote up 
@Test
public void testPatternWithSubtypingAndFilter() {
	Pattern<Event, Event> pattern = Pattern.<Event>begin("start").next("subevent").subtype(SubEvent.class).where(new SimpleCondition<SubEvent>() {
		private static final long serialVersionUID = -4118591291880230304L;

		@Override
		public boolean filter(SubEvent value) throws Exception {
			return false;
		}
	}).followedBy("end");

	Pattern<Event, ?> previous;
	Pattern<Event, ?> previous2;

	assertNotNull(previous = pattern.getPrevious());
	assertNotNull(previous2 = previous.getPrevious());
	assertNull(previous2.getPrevious());

	assertEquals(ConsumingStrategy.SKIP_TILL_NEXT, pattern.getQuantifier().getConsumingStrategy());
	assertNotNull(previous.getCondition());

	assertEquals(pattern.getName(), "end");
	assertEquals(previous.getName(), "subevent");
	assertEquals(previous2.getName(), "start");
}
Example #7
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test(expected = FlinkRuntimeException.class)
public void testSkipToFirstElementOfMatch() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a1", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("a",
		AfterMatchSkipStrategy.skipToFirst("a").throwExceptionOnMiss()
	).where(
		new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().contains("a");
			}
		}
	);
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	//skip to first element of a match should throw exception if they are enabled,
	//this mode is used in MATCH RECOGNIZE which assumes that skipping to first element
	//would result in infinite loop. In CEP by default(with exceptions disabled), we use no skip
	//strategy in this case.
}
Example #8
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testSkipPastLast() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.skipPastLastEvent())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	comparePatterns(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #9
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testNoSkip() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.noSkip())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	comparePatterns(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a2, a3, a4),
		Lists.newArrayList(a3, a4, a5),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #10
Source File: PatternTest.java    From flink with Apache License 2.0 5 votes vote down vote up 
private SimpleCondition<Object> dummyCondition() {
	return new SimpleCondition<Object>() {
		private static final long serialVersionUID = -2205071036073867531L;

		@Override
		public boolean filter(Object value) throws Exception {
			return true;
		}
	};
}
Example #11
Source File: NFAITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithOneOrMoreStrict() throws Exception {

	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("a");
		}
	}).oneOrMore().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #12
Source File: Sort.java    From flink-training-exercises with Apache License 2.0 5 votes vote down vote up 
public static void main(String[] args) throws Exception {

		StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
		env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
		env.setParallelism(1);

		DataStream<Event> eventStream = env.addSource(new OutOfOrderEventSource())
				.assignTimestampsAndWatermarks(new TimestampsAndWatermarks());

		Pattern<Event, ?> matchEverything =
				Pattern.<Event>begin("any")
						.where(new SimpleCondition<Event>() {
							@Override
							public boolean filter(Event event) throws Exception {
								return true;
							}
						});

		PatternStream<Event> patternStream = CEP.pattern(eventStream, matchEverything);
		OutputTag<Event> lateDataOutputTag = new OutputTag<Event>("late-events"){};

		SingleOutputStreamOperator<Event> sorted = patternStream
				.sideOutputLateData(lateDataOutputTag)
				.select(new PatternSelectFunction<Event, Event>() {
					@Override
					public Event select(Map<String, List<Event>> map) throws Exception {
						return map.get("any").get(0);
					}
				});

		sorted.print();
		sorted
				.getSideOutput(lateDataOutputTag)
				.map(e -> new Tuple2<>(e, "LATE"))
				.returns(Types.TUPLE(TypeInformation.of(Event.class), Types.STRING))
				.print();

		env.execute();
	}
Example #13
Source File: NFAITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithZeroOrMoreStrict() throws Exception {
	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("a");
		}
	}).oneOrMore().optional().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #14
Source File: HighWindWarningPattern.java    From FlinkExperiments with MIT License 5 votes vote down vote up 
@Override
public Pattern<LocalWeatherData, ?> getEventPattern() {
    return Pattern
            .<LocalWeatherData>begin("First Event").where(
                    new SimpleCondition<LocalWeatherData>() {
                        @Override
                        public boolean filter(LocalWeatherData event) throws Exception {
                            return event.getWindSpeed() >= 39 && event.getWindSpeed() <= 110;
                        }
                    });
}
Example #15
Source File: ExtremeWindWarningPattern.java    From FlinkExperiments with MIT License 5 votes vote down vote up 
@Override
public Pattern<LocalWeatherData, ?> getEventPattern() {
    return Pattern
            .<LocalWeatherData>begin("First Event").where(
                    new SimpleCondition<LocalWeatherData>() {
                        @Override
                        public boolean filter(LocalWeatherData event) throws Exception {
                            return event.getWindSpeed() > 110;
                        }
                    });
}
Example #16
Source File: IndividualPatternQuantifier.java    From flink-learning with Apache License 2.0 5 votes vote down vote up 
public static void main(String[] args) throws Exception {
    final ParameterTool parameterTool = ExecutionEnvUtil.createParameterTool(args);
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    env.getConfig().setGlobalJobParameters(parameterTool);
    env.setParallelism(1);

    DataStreamSource<String> data = env.socketTextStream("127.0.0.1", 9200);

    Pattern<String, String> pattern = Pattern.<String>begin("start")
            .where(new SimpleCondition<String>() {
                @Override
                public boolean filter(String s) throws Exception {
                    return "a".equals(s);
                }
            })
            .times(5).optional();

    CEP.pattern(data, pattern)
            .select(new PatternSelectFunction<String, String>() {
                @Override
                public String select(Map<String, List<String>> map) throws Exception {
                    log.info(map.toString());
                    return map.get("start").get(0);
                }
            }).print();
    env.execute("flink learning cep Individual Pattern Quantifier");
}
Example #17
Source File: NFAITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithOneOrMoreStrict() throws Exception {

	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("a");
		}
	}).oneOrMore().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #18
Source File: NFAITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithZeroOrMoreStrict() throws Exception {
	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("a");
		}
	}).oneOrMore().optional().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #19
Source File: NFAITCase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithZeroOrMoreStrict() throws Exception {
	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("a");
		}
	}).oneOrMore().optional().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #20
Source File: PatternTest.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
private SimpleCondition<Object> dummyCondition() {
	return new SimpleCondition<Object>() {
		private static final long serialVersionUID = -2205071036073867531L;

		@Override
		public boolean filter(Object value) throws Exception {
			return true;
		}
	};
}
Example #21
Source File: AfterMatchSkipITCase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
@Test
public void testNoSkip() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.noSkip())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	compareMaps(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a2, a3, a4),
		Lists.newArrayList(a3, a4, a5),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #22
Source File: AfterMatchSkipITCase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
@Test
public void testSkipPastLast() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.skipPastLastEvent())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	compareMaps(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #23
Source File: AfterMatchSkipITCase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
@Test(expected = FlinkRuntimeException.class)
public void testSkipToFirstElementOfMatch() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a1", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("a",
		AfterMatchSkipStrategy.skipToFirst("a").throwExceptionOnMiss()
	).where(
		new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().contains("a");
			}
		}
	);
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	//skip to first element of a match should throw exception if they are enabled,
	//this mode is used in MATCH RECOGNIZE which assumes that skipping to first element
	//would result in infinite loop. In CEP by default(with exceptions disabled), we use no skip
	//strategy in this case.
}
Example #24
Source File: NFAITCase.java    From Flink-CEPplus with Apache License 2.0 5 votes vote down vote up 
@Test
public void testStartWithOneOrMoreStrict() throws Exception {

	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("a");
		}
	}).oneOrMore().consecutive();

	testStartWithOneOrZeroOrMoreStrict(pattern);
}
Example #25
Source File: IndividualPatternQuantifier.java    From flink-learning with Apache License 2.0 5 votes vote down vote up 
public static void main(String[] args) throws Exception {
    final ParameterTool parameterTool = ExecutionEnvUtil.createParameterTool(args);
    StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    env.getConfig().setGlobalJobParameters(parameterTool);
    env.setParallelism(1);

    DataStreamSource<String> data = env.socketTextStream("127.0.0.1", 9200);

    Pattern<String, String> pattern = Pattern.<String>begin("start")
            .where(new SimpleCondition<String>() {
                @Override
                public boolean filter(String s) throws Exception {
                    return "a".equals(s);
                }
            })
            .times(5).optional();

    CEP.pattern(data, pattern)
            .select(new PatternSelectFunction<String, String>() {
                @Override
                public String select(Map<String, List<String>> map) throws Exception {
                    log.info(map.toString());
                    return map.get("start").get(0);
                }
            }).print();
    env.execute("flink learning cep Individual Pattern Quantifier");
}
Example #26
Source File: PatternTest.java    From flink with Apache License 2.0 5 votes vote down vote up 
private SimpleCondition<Object> dummyCondition() {
	return new SimpleCondition<Object>() {
		private static final long serialVersionUID = -2205071036073867531L;

		@Override
		public boolean filter(Object value) throws Exception {
			return true;
		}
	};
}
Example #27
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testNoSkip() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.noSkip())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	compareMaps(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a2, a3, a4),
		Lists.newArrayList(a3, a4, a5),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #28
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test
public void testSkipPastLast() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a", 0.0);
	Event a2 = new Event(2, "a", 0.0);
	Event a3 = new Event(3, "a", 0.0);
	Event a4 = new Event(4, "a", 0.0);
	Event a5 = new Event(5, "a", 0.0);
	Event a6 = new Event(6, "a", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));
	streamEvents.add(new StreamRecord<Event>(a2));
	streamEvents.add(new StreamRecord<Event>(a3));
	streamEvents.add(new StreamRecord<Event>(a4));
	streamEvents.add(new StreamRecord<Event>(a5));
	streamEvents.add(new StreamRecord<Event>(a6));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("start", AfterMatchSkipStrategy.skipPastLastEvent())
		.where(new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().equals("a");
			}
		}).times(3);

	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	compareMaps(resultingPatterns, Lists.newArrayList(
		Lists.newArrayList(a1, a2, a3),
		Lists.newArrayList(a4, a5, a6)
	));
}
Example #29
Source File: AfterMatchSkipITCase.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Test(expected = FlinkRuntimeException.class)
public void testSkipToFirstElementOfMatch() throws Exception {
	List<StreamRecord<Event>> streamEvents = new ArrayList<>();

	Event a1 = new Event(1, "a1", 0.0);

	streamEvents.add(new StreamRecord<Event>(a1));

	Pattern<Event, ?> pattern = Pattern.<Event>begin("a",
		AfterMatchSkipStrategy.skipToFirst("a").throwExceptionOnMiss()
	).where(
		new SimpleCondition<Event>() {

			@Override
			public boolean filter(Event value) throws Exception {
				return value.getName().contains("a");
			}
		}
	);
	NFATestHarness nfaTestHarness = NFATestHarness.forPattern(pattern).build();

	List<List<Event>> resultingPatterns = nfaTestHarness.feedRecords(streamEvents);

	//skip to first element of a match should throw exception if they are enabled,
	//this mode is used in MATCH RECOGNIZE which assumes that skipping to first element
	//would result in infinite loop. In CEP by default(with exceptions disabled), we use no skip
	//strategy in this case.
}
Example #30
Source File: NFAITCase.java    From flink with Apache License 2.0 4 votes vote down vote up 
@Test
public void testStartAndEndWithZeroOrMore() throws Exception {
	List<StreamRecord<Event>> inputEvents = new ArrayList<>();

	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, "d", 5.0);
	Event end2 = new Event(45, "d", 5.0);
	Event end3 = new Event(46, "d", 5.0);

	inputEvents.add(new StreamRecord<>(startEvent, 1));
	inputEvents.add(new StreamRecord<>(middleEvent1, 3));
	inputEvents.add(new StreamRecord<>(middleEvent2, 4));
	inputEvents.add(new StreamRecord<>(middleEvent3, 5));
	inputEvents.add(new StreamRecord<>(end1, 6));
	inputEvents.add(new StreamRecord<>(end2, 6));
	inputEvents.add(new StreamRecord<>(end3, 6));

	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("a");
		}
	}).oneOrMore().optional();

	NFA<Event> nfa = compile(pattern, false);

	final List<List<Event>> resultingPatterns = feedNFA(inputEvents, nfa);

	compareMaps(resultingPatterns, Lists.<List<Event>>newArrayList(
		Lists.newArrayList(middleEvent1, middleEvent2, middleEvent3),
		Lists.newArrayList(middleEvent1, middleEvent2),
		Lists.newArrayList(middleEvent1),
		Lists.newArrayList(middleEvent2, middleEvent3),
		Lists.newArrayList(middleEvent2),
		Lists.newArrayList(middleEvent3)
	));
}