Examples with KafkaSystemDescriptor org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor used on opensource projects

Example 11 with KafkaSystemDescriptor

use of org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor in project samza by apache.

the class KeyValueStoreExample method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    KafkaSystemDescriptor trackingSystem = new KafkaSystemDescriptor("tracking");
    KafkaInputDescriptor<PageViewEvent> inputStreamDescriptor = trackingSystem.getInputDescriptor("pageViewEvent", new JsonSerdeV2<>(PageViewEvent.class));
    KafkaOutputDescriptor<KV<String, StatsOutput>> outputStreamDescriptor = trackingSystem.getOutputDescriptor("pageViewEventPerMember", KVSerde.of(new StringSerde(), new JsonSerdeV2<>(StatsOutput.class)));
    appDescriptor.withDefaultSystem(trackingSystem);
    MessageStream<PageViewEvent> pageViewEvents = appDescriptor.getInputStream(inputStreamDescriptor);
    OutputStream<KV<String, StatsOutput>> pageViewEventPerMember = appDescriptor.getOutputStream(outputStreamDescriptor);
    pageViewEvents.partitionBy(pve -> pve.getMemberId(), pve -> pve, KVSerde.of(new StringSerde(), new JsonSerdeV2<>(PageViewEvent.class)), "partitionBy").map(KV::getValue).flatMap(new MyStatsCounter()).map(stats -> KV.of(stats.memberId, stats)).sendTo(pageViewEventPerMember);
}

Example 12 with KafkaSystemDescriptor

use of org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor in project samza by apache.

the class AppWithGlobalConfigExample method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    KafkaSystemDescriptor trackingSystem = new KafkaSystemDescriptor("tracking");
    KafkaInputDescriptor<PageViewEvent> inputStreamDescriptor = trackingSystem.getInputDescriptor("pageViewEvent", new JsonSerdeV2<>(PageViewEvent.class));
    KafkaOutputDescriptor<KV<String, PageViewCount>> outputStreamDescriptor = trackingSystem.getOutputDescriptor("pageViewEventPerMember", KVSerde.of(new StringSerde(), new JsonSerdeV2<>(PageViewCount.class)));
    appDescriptor.getInputStream(inputStreamDescriptor).window(Windows.<PageViewEvent, String, Integer>keyedTumblingWindow(PageViewEvent::getMemberId, Duration.ofSeconds(10), () -> 0, (m, c) -> c + 1, null, null).setEarlyTrigger(Triggers.repeat(Triggers.count(5))).setAccumulationMode(AccumulationMode.DISCARDING), "window1").map(m -> KV.of(m.getKey().getKey(), buildPageViewCount(m))).sendTo(appDescriptor.getOutputStream(outputStreamDescriptor));
    appDescriptor.withMetricsReporterFactories(new HashMap<>());
}

Example 13 with KafkaSystemDescriptor

use of org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor in project samza by apache.

the class BroadcastExample method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    KVSerde<String, PageViewEvent> serde = KVSerde.of(new StringSerde("UTF-8"), new JsonSerdeV2<>(PageViewEvent.class));
    KafkaSystemDescriptor trackingSystem = new KafkaSystemDescriptor("tracking");
    KafkaInputDescriptor<KV<String, PageViewEvent>> pageViewEvent = trackingSystem.getInputDescriptor("pageViewEvent", serde);
    KafkaOutputDescriptor<KV<String, PageViewEvent>> outStream1 = trackingSystem.getOutputDescriptor("outStream1", serde);
    KafkaOutputDescriptor<KV<String, PageViewEvent>> outStream2 = trackingSystem.getOutputDescriptor("outStream2", serde);
    KafkaOutputDescriptor<KV<String, PageViewEvent>> outStream3 = trackingSystem.getOutputDescriptor("outStream3", serde);
    MessageStream<KV<String, PageViewEvent>> inputStream = appDescriptor.getInputStream(pageViewEvent);
    inputStream.filter(m -> m.key.equals("key1")).sendTo(appDescriptor.getOutputStream(outStream1));
    inputStream.filter(m -> m.key.equals("key2")).sendTo(appDescriptor.getOutputStream(outStream2));
    inputStream.filter(m -> m.key.equals("key3")).sendTo(appDescriptor.getOutputStream(outStream3));
}

Example 14 with KafkaSystemDescriptor

use of org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor in project samza by apache.

the class OrderShipmentJoinExample method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    KafkaSystemDescriptor trackingSystem = new KafkaSystemDescriptor("tracking");
    KafkaInputDescriptor<OrderRecord> orderStreamDescriptor = trackingSystem.getInputDescriptor("orders", new JsonSerdeV2<>(OrderRecord.class));
    KafkaInputDescriptor<ShipmentRecord> shipmentStreamDescriptor = trackingSystem.getInputDescriptor("shipments", new JsonSerdeV2<>(ShipmentRecord.class));
    KafkaOutputDescriptor<KV<String, FulfilledOrderRecord>> fulfilledOrdersStreamDescriptor = trackingSystem.getOutputDescriptor("fulfilledOrders", KVSerde.of(new StringSerde(), new JsonSerdeV2<>(FulfilledOrderRecord.class)));
    appDescriptor.getInputStream(orderStreamDescriptor).join(appDescriptor.getInputStream(shipmentStreamDescriptor), new MyJoinFunction(), new StringSerde(), new JsonSerdeV2<>(OrderRecord.class), new JsonSerdeV2<>(ShipmentRecord.class), Duration.ofMinutes(1), "join").map(fulFilledOrder -> KV.of(fulFilledOrder.orderId, fulFilledOrder)).sendTo(appDescriptor.getOutputStream(fulfilledOrdersStreamDescriptor));
}

Example 15 with KafkaSystemDescriptor

use of org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor in project samza by apache.

the class RepartitionExample method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    KafkaSystemDescriptor trackingSystem = new KafkaSystemDescriptor("tracking");
    KafkaInputDescriptor<PageViewEvent> inputStreamDescriptor = trackingSystem.getInputDescriptor("pageViewEvent", new JsonSerdeV2<>(PageViewEvent.class));
    KafkaOutputDescriptor<KV<String, MyStreamOutput>> outputStreamDescriptor = trackingSystem.getOutputDescriptor("pageViewEventPerMember", KVSerde.of(new StringSerde(), new JsonSerdeV2<>(MyStreamOutput.class)));
    appDescriptor.withDefaultSystem(trackingSystem);
    MessageStream<PageViewEvent> pageViewEvents = appDescriptor.getInputStream(inputStreamDescriptor);
    OutputStream<KV<String, MyStreamOutput>> pageViewEventPerMember = appDescriptor.getOutputStream(outputStreamDescriptor);
    pageViewEvents.partitionBy(pve -> pve.getMemberId(), pve -> pve, KVSerde.of(new StringSerde(), new JsonSerdeV2<>(PageViewEvent.class)), "partitionBy").window(Windows.keyedTumblingWindow(KV::getKey, Duration.ofMinutes(5), () -> 0, (m, c) -> c + 1, null, null), "window").map(windowPane -> KV.of(windowPane.getKey().getKey(), new MyStreamOutput(windowPane))).sendTo(pageViewEventPerMember);
}