Java Code Examples for org.apache.flink.cep.pattern.Pattern#begin()

@Override
public void enterClassIdentifier(PatternLanguageParser.ClassIdentifierContext ctx) {
    if (pattern == null) {
        pattern = Pattern.begin(ctx.getText(), afterMatchSkipStrategy);
    }
    else {
        pattern = patternCombiner.apply(pattern,ctx.getText());
    }
    outerContextMatcher.add(eventTypeMatcherFor(ctx.getText()));
}
 

public static void main(String[] args) throws Exception {

		ParameterTool params = ParameterTool.fromArgs(args);
		final String input = params.get("input", ExerciseBase.pathToRideData);

		final int servingSpeedFactor = 600; // events of 10 minutes are served in 1 second

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

		// CheckpointedTaxiRideSource delivers events in order
		DataStream<TaxiRide> rides = env.addSource(rideSourceOrTest(new CheckpointedTaxiRideSource(input, servingSpeedFactor)));

		DataStream<TaxiRide> keyedRides = rides
			.keyBy("rideId");

		// A complete taxi ride has a START event followed by an END event
		// This pattern is incomplete ...
		Pattern<TaxiRide, TaxiRide> completedRides = Pattern.<TaxiRide>begin("start");

		// We want to find rides that have NOT been completed within 120 minutes.
		// This pattern matches rides that ARE completed.
		// Below we will ignore rides that match this pattern, and emit those that timeout.
		PatternStream<TaxiRide> patternStream = CEP.pattern(keyedRides, completedRides.within(Time.minutes(120)));

		OutputTag<TaxiRide> timedout = new OutputTag<TaxiRide>("timedout"){};

		SingleOutputStreamOperator<TaxiRide> longRides = patternStream.flatSelect(
				timedout,
				new TaxiRideTimedOut<TaxiRide>(),
				new FlatSelectNothing<TaxiRide>()
		);

		printOrTest(longRides.getSideOutput(timedout));

		throw new MissingSolutionException();

//		env.execute("Long Taxi Rides (CEP)");
	}
 

@Override
public NFA<Event> createNFA() {

	Pattern<Event, ?> pattern = Pattern.begin("1");

	return NFACompiler.compileFactory(pattern, false).createNFA();
}
 

@Override
public NFA<Event> createNFA() {

	Pattern<Event, ?> pattern = Pattern.begin("1");

	return NFACompiler.compileFactory(pattern, false).createNFA();
}
 

@Override
public NFA<Event> createNFA() {

	Pattern<Event, ?> pattern = Pattern.begin("1");

	return NFACompiler.compileFactory(pattern, false).createNFA();
}