Examples with KStream org.apache.kafka.streams.kstream.KStream used on opensource projects

Example 91 with KStream

use of org.apache.kafka.streams.kstream.KStream in project kafka by apache.

the class StreamsPartitionAssignorTest method shouldNotLoopInfinitelyOnMissingMetadataAndShouldNotCreateRelatedTasks.

@Test
public void shouldNotLoopInfinitelyOnMissingMetadataAndShouldNotCreateRelatedTasks() {
    final StreamsBuilder streamsBuilder = new StreamsBuilder();
    final KStream<Object, Object> stream1 = streamsBuilder.stream("topic1").selectKey((key, value) -> null).groupByKey().count(Materialized.as("count")).toStream().map((KeyValueMapper<Object, Long, KeyValue<Object, Object>>) (key, value) -> null);
    streamsBuilder.stream("unknownTopic").selectKey((key, value) -> null).join(stream1, (ValueJoiner<Object, Object, Void>) (value1, value2) -> null, JoinWindows.of(ofMillis(0)));
    final String client = "client1";
    builder = TopologyWrapper.getInternalTopologyBuilder(streamsBuilder.build());
    final MockInternalTopicManager mockInternalTopicManager = configureDefault();
    subscriptions.put(client, new Subscription(Collections.singletonList("unknownTopic"), defaultSubscriptionInfo.encode()));
    final Map<String, Assignment> assignment = partitionAssignor.assign(metadata, new GroupSubscription(subscriptions)).groupAssignment();
    assertThat(mockInternalTopicManager.readyTopics.isEmpty(), equalTo(true));
    assertThat(assignment.get(client).partitions().isEmpty(), equalTo(true));
}