Examples with CEPStream com.github.fhuss.kafka.streams.cep.CEPStream used on opensource projects

Example 1 with CEPStream

use of com.github.fhuss.kafka.streams.cep.CEPStream in project kafkastreams-cep by fhussonnois.

the class CEPStockKStreamsIntegrationTest method test.

@Test
public void test() throws ExecutionException, InterruptedException {
    final Collection<KeyValue<String, String>> batch1 = Arrays.asList(new KeyValue<>(null, "{\"name\":\"e1\",\"price\":100,\"volume\":1010}"), new KeyValue<>(null, "{\"name\":\"e2\",\"price\":120,\"volume\":990}"), new KeyValue<>(null, "{\"name\":\"e3\",\"price\":120,\"volume\":1005}"), new KeyValue<>(null, "{\"name\":\"e4\",\"price\":121,\"volume\":999}"), new KeyValue<>(null, "{\"name\":\"e5\",\"price\":120,\"volume\":999}"), new KeyValue<>(null, "{\"name\":\"e6\",\"price\":125,\"volume\":750}"), new KeyValue<>(null, "{\"name\":\"e7\",\"price\":120,\"volume\":950}"), new KeyValue<>(null, "{\"name\":\"e8\",\"price\":120,\"volume\":700}"));
    IntegrationTestUtils.produceKeyValuesSynchronously(INPUT_STREAM, batch1, TestUtils.producerConfig(CLUSTER.bootstrapServers(), StringSerializer.class, StringSerializer.class, new Properties()), mockTime);
    // build query
    ComplexStreamsBuilder builder = new ComplexStreamsBuilder();
    CEPStream<String, StockEvent> stream = builder.stream(INPUT_STREAM);
    KStream<String, Sequence<String, StockEvent>> stocks = stream.query("Stocks", Patterns.STOCKS);
    stocks.mapValues(seq -> {
        JSONObject json = new JSONObject();
        seq.asMap().forEach((k, v) -> {
            JSONArray events = new JSONArray();
            json.put(k, events);
            List<String> collect = v.stream().map(e -> e.value.name).collect(Collectors.toList());
            Collections.reverse(collect);
            collect.forEach(events::add);
        });
        return json.toJSONString();
    }).through(OUTPUT_STREAM, Produced.with(null, Serdes.String())).print(Printed.toSysOut());
    Topology topology = builder.build();
    kafkaStreams = new KafkaStreams(topology, streamsConfiguration);
    kafkaStreams.start();
    final Properties consumerConfig = TestUtils.consumerConfig(CLUSTER.bootstrapServers(), StringDeserializer.class, StringDeserializer.class);
    List<KeyValue<String, String>> result = IntegrationTestUtils.readKeyValues(OUTPUT_STREAM, consumerConfig, TimeUnit.SECONDS.toMillis(10), 4);
    Assert.assertEquals(4, result.size());
    Assert.assertEquals("{\"0\":[\"e1\"],\"1\":[\"e2\",\"e3\",\"e4\",\"e5\"],\"2\":[\"e6\"]}", result.get(0).value);
    Assert.assertEquals("{\"0\":[\"e3\"],\"1\":[\"e4\"],\"2\":[\"e6\"]}", result.get(1).value);
    Assert.assertEquals("{\"0\":[\"e1\"],\"1\":[\"e2\",\"e3\",\"e4\",\"e5\",\"e6\",\"e7\"],\"2\":[\"e8\"]}", result.get(2).value);
    Assert.assertEquals("{\"0\":[\"e3\"],\"1\":[\"e4\",\"e6\"],\"2\":[\"e8\"]}", result.get(3).value);
}