Java Code Examples for org.apache.flink.cep.PatternStream#select()

The following examples show how to use org.apache.flink.cep.PatternStream#select() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: PatternEvaluationTests.java    From flink-cep-dsl with Apache License 2.0 6 votes vote down vote up 
private void executeTest(String pattern, List<Event> data) throws Exception {

        StreamExecutionEnvironment streamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment();

        DataStream<Event> eventDataStream = streamExecutionEnvironment.fromCollection(data);

        PatternStream<Event> patternStream = Dsl.compile(pattern, eventDataStream);

        patternStream.select(new PatternSelectFunction<Event, Event>() {
            private static final long serialVersionUID = 7242171752905668044L;

            @Override
            public Event select(Map<String, List<Event>> map) {
                results.putAll(map);
                return null;
            }
        });

        streamExecutionEnvironment.execute("test");
    }
Example 2
Source File: PatternExecutor.java    From flink-cep-dsl with Apache License 2.0 6 votes vote down vote up 
static void executeTest(String pattern, List<Event> data) throws Exception {

        StreamExecutionEnvironment streamExecutionEnvironment = StreamExecutionEnvironment.getExecutionEnvironment();

        DataStream<Event> eventDataStream = streamExecutionEnvironment.fromCollection(data);

        PatternStream<Event> patternStream = Dsl.compile(pattern, eventDataStream);

        patternStream.select(new PatternSelectFunction<Event, Event>() {
            private static final long serialVersionUID = 7242171752905668044L;

            @Override
            public Event select(Map<String, List<Event>> map) {
                results.add(map);
                return null;
            }
        });

        streamExecutionEnvironment.execute("test");
    }
Example 3
Source File: WeatherDataComplexEventProcessingExample2.java    From FlinkExperiments with MIT License 6 votes vote down vote up 
private static <TWarningType extends IWarning> DataStream<TWarningType> toWarningStream(DataStream<LocalWeatherData> localWeatherDataDataStream, IWarningPattern<LocalWeatherData, TWarningType> warningPattern) {
    PatternStream<LocalWeatherData> tempPatternStream = CEP.pattern(
            localWeatherDataDataStream.keyBy(new KeySelector<LocalWeatherData, String>() {
                @Override
                public String getKey(LocalWeatherData localWeatherData) throws Exception {
                    return localWeatherData.getStation().getWban();
                }
            }),
            warningPattern.getEventPattern());

    DataStream<TWarningType> warnings = tempPatternStream.select(new PatternSelectFunction<LocalWeatherData, TWarningType>() {
        @Override
        public TWarningType select(Map<String, List<LocalWeatherData>> map) throws Exception {
            return warningPattern.create(map);
        }
    }, new GenericTypeInfo<TWarningType>(warningPattern.getWarningTargetType()));

    return warnings;
}
Example 4
Source File: WeatherDataComplexEventProcessingExample.java    From FlinkExperiments with MIT License 6 votes vote down vote up 
private static <TWarningType extends IWarning> DataStream<TWarningType> toWarningStream(DataStream<LocalWeatherData> localWeatherDataDataStream, IWarningPattern<LocalWeatherData, TWarningType> warningPattern) {
    PatternStream<LocalWeatherData> tempPatternStream = CEP.pattern(
            localWeatherDataDataStream.keyBy(new KeySelector<LocalWeatherData, String>() {
                @Override
                public String getKey(LocalWeatherData localWeatherData) throws Exception {
                    return localWeatherData.getStation().getWban();
                }
            }),
            warningPattern.getEventPattern());

    DataStream<TWarningType> warnings = tempPatternStream.select(new PatternSelectFunction<LocalWeatherData, TWarningType>() {
        @Override
        public TWarningType select(Map<String, List<LocalWeatherData>> map) throws Exception {
            return warningPattern.create(map);
        }
    }, new GenericTypeInfo<TWarningType>(warningPattern.getWarningTargetType()));

    return warnings;
}