Java Code Examples for org.apache.kafka.streams.Topology#addStateStore()

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Example 1
Source File: StreamsUtils.java    From football-events with MIT License 5 votes vote down vote up 
public static <D, E extends Event> void addStore(Topology topology, Class<D> domainType, String store,
        Class<E>... eventTypes) {
    StoreBuilder<KeyValueStore<String, D>> matchStoreBuilder = Stores.keyValueStoreBuilder(
            Stores.persistentKeyValueStore(store), Serdes.String(), new JsonPojoSerde<D>(domainType))
            .withLoggingDisabled();

    String[] processorNames = Stream.of(eventTypes)
        .map(event -> event.getSimpleName() + "Process")
        .collect(Collectors.toList()).toArray(new String[eventTypes.length]);

    topology.addStateStore(matchStoreBuilder, processorNames);
}
Example 2
Source File: StockFeedApp.java    From Kafka-Streams-Real-time-Stream-Processing with The Unlicense 4 votes vote down vote up 
public static void main(String[] args) {

        Properties props = new Properties();
        props.put(StreamsConfig.APPLICATION_ID_CONFIG, AppConfigs.applicationID);
        props.put(StreamsConfig.BOOTSTRAP_SERVERS_CONFIG, AppConfigs.bootstrapServers);
        props.put(StreamsConfig.STATE_DIR_CONFIG, AppConfigs.stateStoreLocation);

        Topology topology = new Topology();

        topology.addSource(
            AppConfigs.sourceName,
            AppSerdes.String().deserializer(),
            AppSerdes.StockTicker().deserializer(),
            AppConfigs.sourceTopicName);

        topology.addProcessor(
            StockProcessor.PROCESSOR_NAME,
            () -> new StockProcessor(),
            AppConfigs.sourceName);

        StoreBuilder storeBuilder = Stores.keyValueStoreBuilder(
            Stores.persistentKeyValueStore(StockProcessor.STATE_STORE_NAME),
            AppSerdes.String(),
            AppSerdes.TickerStack()
        );

        topology.addStateStore(
            storeBuilder,
            StockProcessor.PROCESSOR_NAME);

        topology.addSink(AppConfigs.sinkName,
            AppConfigs.targetTopicName,
            AppSerdes.String().serializer(),
            AppSerdes.StockTicker().serializer(),
            StockProcessor.PROCESSOR_NAME);

        KafkaStreams streams = new KafkaStreams(topology, props);
        streams.start();

        Runtime.getRuntime().addShutdownHook(new Thread(streams::close));
    }