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Pattern.begin("start")
        .where((IterativeCondition) new OrderSumCondition())
        .within(Time.seconds(5L));
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(envConfiguration);
DataStream<Event> input =
    env.fromElements(
        new Event(1, "barfoo", 1.0),
        new Event(2, "barfoo", 2.0),
        new Event(3, "foobar", 3.0),
        new Event(4, "foobar", 5.0),
        new Event(5, "foobar", 42.0),
        new Event(6, "foobar", 1.0));
DataStream<String> result =
        CEP.pattern(input, pattern)
				.inProcessingTime()
                .flatSelect(
                        (p, o) -> {
                            o.collect(String.valueOf(p.get("start").get(0).getId()));
                        },
                        Types.STRING);
result.print()