Examples with JsonSerializer org.apache.kafka.connect.json.JsonSerializer used on opensource projects

Example 1 with JsonSerializer

use of org.apache.kafka.connect.json.JsonSerializer in project apache-kafka-on-k8s by banzaicloud.

the class PageViewUntypedDemo method main.

public static void main(String[] args) throws Exception {
    Properties props = new Properties();
    props.put(StreamsConfig.APPLICATION_ID_CONFIG, "streams-pageview-untyped");
    props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
    props.put(StreamsConfig.DEFAULT_TIMESTAMP_EXTRACTOR_CLASS_CONFIG, JsonTimestampExtractor.class);
    props.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, 0);
    // setting offset reset to earliest so that we can re-run the demo code with the same pre-loaded data
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
    StreamsBuilder builder = new StreamsBuilder();
    final Serializer<JsonNode> jsonSerializer = new JsonSerializer();
    final Deserializer<JsonNode> jsonDeserializer = new JsonDeserializer();
    final Serde<JsonNode> jsonSerde = Serdes.serdeFrom(jsonSerializer, jsonDeserializer);
    final Consumed<String, JsonNode> consumed = Consumed.with(Serdes.String(), jsonSerde);
    KStream<String, JsonNode> views = builder.stream("streams-pageview-input", consumed);
    KTable<String, JsonNode> users = builder.table("streams-userprofile-input", consumed);
    KTable<String, String> userRegions = users.mapValues(new ValueMapper<JsonNode, String>() {

        @Override
        public String apply(JsonNode record) {
            return record.get("region").textValue();
        }
    });
    KStream<JsonNode, JsonNode> regionCount = views.leftJoin(userRegions, new ValueJoiner<JsonNode, String, JsonNode>() {

        @Override
        public JsonNode apply(JsonNode view, String region) {
            ObjectNode jNode = JsonNodeFactory.instance.objectNode();
            return jNode.put("user", view.get("user").textValue()).put("page", view.get("page").textValue()).put("region", region == null ? "UNKNOWN" : region);
        }
    }).map(new KeyValueMapper<String, JsonNode, KeyValue<String, JsonNode>>() {

        @Override
        public KeyValue<String, JsonNode> apply(String user, JsonNode viewRegion) {
            return new KeyValue<>(viewRegion.get("region").textValue(), viewRegion);
        }
    }).groupByKey(Serialized.with(Serdes.String(), jsonSerde)).windowedBy(TimeWindows.of(7 * 24 * 60 * 60 * 1000L).advanceBy(1000)).count().toStream().map(new KeyValueMapper<Windowed<String>, Long, KeyValue<JsonNode, JsonNode>>() {

        @Override
        public KeyValue<JsonNode, JsonNode> apply(Windowed<String> key, Long value) {
            ObjectNode keyNode = JsonNodeFactory.instance.objectNode();
            keyNode.put("window-start", key.window().start()).put("region", key.key());
            ObjectNode valueNode = JsonNodeFactory.instance.objectNode();
            valueNode.put("count", value);
            return new KeyValue<>((JsonNode) keyNode, (JsonNode) valueNode);
        }
    });
    // write to the result topic
    regionCount.to("streams-pageviewstats-untyped-output", Produced.with(jsonSerde, jsonSerde));
    KafkaStreams streams = new KafkaStreams(builder.build(), props);
    streams.start();
    // usually the stream application would be running forever,
    // in this example we just let it run for some time and stop since the input data is finite.
    Thread.sleep(5000L);
    streams.close();
}

Example 2 with JsonSerializer

use of org.apache.kafka.connect.json.JsonSerializer in project kafka by apache.

the class PageViewUntypedDemo method main.

public static void main(final String[] args) throws Exception {
    final Properties props = new Properties();
    props.put(StreamsConfig.APPLICATION_ID_CONFIG, "streams-pageview-untyped");
    props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092");
    props.put(StreamsConfig.DEFAULT_TIMESTAMP_EXTRACTOR_CLASS_CONFIG, JsonTimestampExtractor.class);
    props.put(StreamsConfig.CACHE_MAX_BYTES_BUFFERING_CONFIG, 0);
    // setting offset reset to earliest so that we can re-run the demo code with the same pre-loaded data
    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
    final StreamsBuilder builder = new StreamsBuilder();
    final Serializer<JsonNode> jsonSerializer = new JsonSerializer();
    final Deserializer<JsonNode> jsonDeserializer = new JsonDeserializer();
    final Serde<JsonNode> jsonSerde = Serdes.serdeFrom(jsonSerializer, jsonDeserializer);
    final Consumed<String, JsonNode> consumed = Consumed.with(Serdes.String(), jsonSerde);
    final KStream<String, JsonNode> views = builder.stream("streams-pageview-input", consumed);
    final KTable<String, JsonNode> users = builder.table("streams-userprofile-input", consumed);
    final KTable<String, String> userRegions = users.mapValues(record -> record.get("region").textValue());
    final Duration duration24Hours = Duration.ofHours(24);
    final KStream<JsonNode, JsonNode> regionCount = views.leftJoin(userRegions, (view, region) -> {
        final ObjectNode jNode = JsonNodeFactory.instance.objectNode();
        return (JsonNode) jNode.put("user", view.get("user").textValue()).put("page", view.get("page").textValue()).put("region", region == null ? "UNKNOWN" : region);
    }).map((user, viewRegion) -> new KeyValue<>(viewRegion.get("region").textValue(), viewRegion)).groupByKey(Grouped.with(Serdes.String(), jsonSerde)).windowedBy(TimeWindows.ofSizeAndGrace(Duration.ofDays(7), duration24Hours).advanceBy(Duration.ofSeconds(1))).count().toStream().map((key, value) -> {
        final ObjectNode keyNode = JsonNodeFactory.instance.objectNode();
        keyNode.put("window-start", key.window().start()).put("region", key.key());
        final ObjectNode valueNode = JsonNodeFactory.instance.objectNode();
        valueNode.put("count", value);
        return new KeyValue<>((JsonNode) keyNode, (JsonNode) valueNode);
    });
    // write to the result topic
    regionCount.to("streams-pageviewstats-untyped-output", Produced.with(jsonSerde, jsonSerde));
    final KafkaStreams streams = new KafkaStreams(builder.build(), props);
    streams.start();
    // usually the stream application would be running forever,
    // in this example we just let it run for some time and stop since the input data is finite.
    Thread.sleep(5000L);
    streams.close();
}