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

Example 1 with KafkaSystemDescriptor

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

the class TestStandaloneIntegrationApplication method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    String systemName = "testSystemName";
    String inputStreamName = appDescriptor.getConfig().get("input.stream.name");
    String outputStreamName = "standaloneIntegrationTestKafkaOutputTopic";
    LOGGER.info("Publishing message from: {} to: {}.", inputStreamName, outputStreamName);
    KafkaSystemDescriptor kafkaSystemDescriptor = new KafkaSystemDescriptor(systemName);
    KVSerde<Object, Object> noOpSerde = KVSerde.of(new NoOpSerde<>(), new NoOpSerde<>());
    KafkaInputDescriptor<KV<Object, Object>> isd = kafkaSystemDescriptor.getInputDescriptor(inputStreamName, noOpSerde);
    KafkaOutputDescriptor<KV<Object, Object>> osd = kafkaSystemDescriptor.getOutputDescriptor(outputStreamName, noOpSerde);
    appDescriptor.getInputStream(isd).sendTo(appDescriptor.getOutputStream(osd));
}

Example 2 with KafkaSystemDescriptor

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

the class TestSchedulingApp method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    final JsonSerdeV2<PageView> serde = new JsonSerdeV2<>(PageView.class);
    KafkaSystemDescriptor ksd = new KafkaSystemDescriptor("kafka");
    KafkaInputDescriptor<PageView> isd = ksd.getInputDescriptor(PAGE_VIEWS, serde);
    final MessageStream<PageView> pageViews = appDescriptor.getInputStream(isd);
    final MessageStream<PageView> output = pageViews.flatMap(new FlatmapScheduledFn());
    MessageStreamAssert.that("Output from scheduling function should container all complete messages", output, serde).containsInAnyOrder(Arrays.asList(new PageView("v1-complete", "p1", "u1"), new PageView("v2-complete", "p2", "u1"), new PageView("v3-complete", "p1", "u2"), new PageView("v4-complete", "p3", "u2")));
}

Example 3 with KafkaSystemDescriptor

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

the class RepartitionJoinWindowApp method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    // offset.default = oldest required for tests since checkpoint topic is empty on start and messages are published
    // before the application is run
    Config config = appDescriptor.getConfig();
    String inputTopic1 = config.get(INPUT_TOPIC_1_CONFIG_KEY);
    String inputTopic2 = config.get(INPUT_TOPIC_2_CONFIG_KEY);
    String outputTopic = config.get(OUTPUT_TOPIC_CONFIG_KEY);
    KafkaSystemDescriptor ksd = new KafkaSystemDescriptor(SYSTEM);
    KafkaInputDescriptor<PageView> id1 = ksd.getInputDescriptor(inputTopic1, new JsonSerdeV2<>(PageView.class));
    KafkaInputDescriptor<AdClick> id2 = ksd.getInputDescriptor(inputTopic2, new JsonSerdeV2<>(AdClick.class));
    MessageStream<PageView> pageViews = appDescriptor.getInputStream(id1);
    MessageStream<AdClick> adClicks = appDescriptor.getInputStream(id2);
    MessageStream<KV<String, PageView>> pageViewsRepartitionedByViewId = pageViews.partitionBy(PageView::getViewId, pv -> pv, new KVSerde<>(new StringSerde(), new JsonSerdeV2<>(PageView.class)), "pageViewsByViewId");
    MessageStream<PageView> pageViewsRepartitionedByViewIdValueONly = pageViewsRepartitionedByViewId.map(KV::getValue);
    MessageStream<KV<String, AdClick>> adClicksRepartitionedByViewId = adClicks.partitionBy(AdClick::getViewId, ac -> ac, new KVSerde<>(new StringSerde(), new JsonSerdeV2<>(AdClick.class)), "adClicksByViewId");
    MessageStream<AdClick> adClicksRepartitionedByViewIdValueOnly = adClicksRepartitionedByViewId.map(KV::getValue);
    MessageStream<UserPageAdClick> userPageAdClicks = pageViewsRepartitionedByViewIdValueONly.join(adClicksRepartitionedByViewIdValueOnly, new UserPageViewAdClicksJoiner(), new StringSerde(), new JsonSerdeV2<>(PageView.class), new JsonSerdeV2<>(AdClick.class), Duration.ofMinutes(1), "pageViewAdClickJoin");
    MessageStream<KV<String, UserPageAdClick>> userPageAdClicksByUserId = userPageAdClicks.partitionBy(UserPageAdClick::getUserId, upac -> upac, KVSerde.of(new StringSerde(), new JsonSerdeV2<>(UserPageAdClick.class)), "userPageAdClicksByUserId");
    userPageAdClicksByUserId.map(KV::getValue).window(Windows.keyedSessionWindow(UserPageAdClick::getUserId, Duration.ofSeconds(3), new StringSerde(), new JsonSerdeV2<>(UserPageAdClick.class)), "userAdClickWindow").map(windowPane -> KV.of(windowPane.getKey().getKey(), String.valueOf(windowPane.getMessage().size()))).sink((message, messageCollector, taskCoordinator) -> {
        taskCoordinator.commit(TaskCoordinator.RequestScope.ALL_TASKS_IN_CONTAINER);
        messageCollector.send(new OutgoingMessageEnvelope(new SystemStream("kafka", outputTopic), null, message.getKey(), message.getValue()));
    });
    intermediateStreamIds.add(((IntermediateMessageStreamImpl) pageViewsRepartitionedByViewId).getStreamId());
    intermediateStreamIds.add(((IntermediateMessageStreamImpl) adClicksRepartitionedByViewId).getStreamId());
    intermediateStreamIds.add(((IntermediateMessageStreamImpl) userPageAdClicksByUserId).getStreamId());
}

Example 4 with KafkaSystemDescriptor

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

the class MyStatefulApplication method describe.

@Override
public void describe(TaskApplicationDescriptor appDescriptor) {
    KafkaSystemDescriptor ksd = new KafkaSystemDescriptor(inputSystem);
    KVSerde<String, String> serde = KVSerde.of(new StringSerde(), new StringSerde());
    KafkaInputDescriptor<KV<String, String>> isd = ksd.getInputDescriptor(inputTopic, serde);
    TaskApplicationDescriptor desc = appDescriptor.withInputStream(isd).withTaskFactory((StreamTaskFactory) () -> new MyTask(storeToChangelog.keySet()));
    storeToChangelog.forEach((storeName, changelogTopic) -> {
        RocksDbTableDescriptor<String, String> td = new RocksDbTableDescriptor<>(storeName, serde).withChangelogStream(changelogTopic).withChangelogReplicationFactor(1);
        desc.withTable(td);
    });
}

Example 5 with KafkaSystemDescriptor

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

the class SessionWindowApp method describe.

@Override
public void describe(StreamApplicationDescriptor appDescriptor) {
    JsonSerdeV2<PageView> inputSerde = new JsonSerdeV2<>(PageView.class);
    KVSerde<String, Integer> outputSerde = KVSerde.of(new StringSerde(), new IntegerSerde());
    KafkaSystemDescriptor ksd = new KafkaSystemDescriptor(SYSTEM);
    KafkaInputDescriptor<PageView> id = ksd.getInputDescriptor(INPUT_TOPIC, inputSerde);
    KafkaOutputDescriptor<KV<String, Integer>> od = ksd.getOutputDescriptor(OUTPUT_TOPIC, outputSerde);
    MessageStream<PageView> pageViews = appDescriptor.getInputStream(id);
    OutputStream<KV<String, Integer>> outputStream = appDescriptor.getOutputStream(od);
    pageViews.filter(m -> !FILTER_KEY.equals(m.getUserId())).window(Windows.keyedSessionWindow(PageView::getUserId, Duration.ofSeconds(3), new StringSerde(), new JsonSerdeV2<>(PageView.class)), "sessionWindow").map(m -> KV.of(m.getKey().getKey(), m.getMessage().size())).sendTo(outputStream);
}