Examples with ConfiguredStreamBuilder io.micronaut.configuration.kafka.streams.ConfiguredStreamBuilder used on opensource projects

Example 1 with ConfiguredStreamBuilder

use of io.micronaut.configuration.kafka.streams.ConfiguredStreamBuilder in project micronaut-kafka by micronaut-projects.

the class WordCountStream method myStream.

@Singleton
@Named(MY_STREAM)
KStream<String, String> myStream(@Named(MY_STREAM) ConfiguredStreamBuilder builder) {
    // end::namedStream[]
    // set default serdes
    Properties props = builder.getConfiguration();
    props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
    props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
    KStream<String, String> source = builder.stream(NAMED_WORD_COUNT_INPUT);
    KTable<String, Long> counts = source.flatMapValues(value -> Arrays.asList(value.toLowerCase(Locale.getDefault()).split(" "))).groupBy((key, value) -> value).count();
    // need to override value serde to Long type
    counts.toStream().to(NAMED_WORD_COUNT_OUTPUT, Produced.with(Serdes.String(), Serdes.Long()));
    return source;
}

Example 2 with ConfiguredStreamBuilder

use of io.micronaut.configuration.kafka.streams.ConfiguredStreamBuilder in project micronaut-kafka by micronaut-projects.

the class WordCountStream method wordCountStream.

// end::clazz[]
// tag::wordCountStream[]
@Singleton
@Named(STREAM_WORD_COUNT)
KStream<String, String> wordCountStream(ConfiguredStreamBuilder builder) {
    // <3>
    // set default serdes
    Properties props = builder.getConfiguration();
    props.put(StreamsConfig.DEFAULT_KEY_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
    props.put(StreamsConfig.DEFAULT_VALUE_SERDE_CLASS_CONFIG, Serdes.String().getClass().getName());
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
    KStream<String, String> source = builder.stream(INPUT);
    KTable<String, Long> groupedByWord = source.flatMapValues(value -> Arrays.asList(value.toLowerCase().split("\\W+"))).groupBy((key, word) -> word, Grouped.with(Serdes.String(), Serdes.String())).count(// <4>
    Materialized.as(WORD_COUNT_STORE));
    groupedByWord.toStream().to(OUTPUT, Produced.with(Serdes.String(), Serdes.Long()));
    return source;
}