use of org.apache.kafka.streams.kstream.ValueMapper in project kafka by apache.
the class KStreamImplTest method shouldPreserveSerdesForOperators.
// specifically testing the deprecated variant
@SuppressWarnings({ "rawtypes", "deprecation" })
@Test
public void shouldPreserveSerdesForOperators() {
final StreamsBuilder builder = new StreamsBuilder();
final KStream<String, String> stream1 = builder.stream(Collections.singleton("topic-1"), stringConsumed);
final KTable<String, String> table1 = builder.table("topic-2", stringConsumed);
final GlobalKTable<String, String> table2 = builder.globalTable("topic-2", stringConsumed);
final ConsumedInternal<String, String> consumedInternal = new ConsumedInternal<>(stringConsumed);
final KeyValueMapper<String, String, String> selector = (key, value) -> key;
final KeyValueMapper<String, String, Iterable<KeyValue<String, String>>> flatSelector = (key, value) -> Collections.singleton(new KeyValue<>(key, value));
final ValueMapper<String, String> mapper = value -> value;
final ValueMapper<String, Iterable<String>> flatMapper = Collections::singleton;
final ValueJoiner<String, String, String> joiner = (value1, value2) -> value1;
assertEquals(((AbstractStream) stream1.filter((key, value) -> false)).keySerde(), consumedInternal.keySerde());
assertEquals(((AbstractStream) stream1.filter((key, value) -> false)).valueSerde(), consumedInternal.valueSerde());
assertEquals(((AbstractStream) stream1.filterNot((key, value) -> false)).keySerde(), consumedInternal.keySerde());
assertEquals(((AbstractStream) stream1.filterNot((key, value) -> false)).valueSerde(), consumedInternal.valueSerde());
assertNull(((AbstractStream) stream1.selectKey(selector)).keySerde());
assertEquals(((AbstractStream) stream1.selectKey(selector)).valueSerde(), consumedInternal.valueSerde());
assertNull(((AbstractStream) stream1.map(KeyValue::new)).keySerde());
assertNull(((AbstractStream) stream1.map(KeyValue::new)).valueSerde());
assertEquals(((AbstractStream) stream1.mapValues(mapper)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.mapValues(mapper)).valueSerde());
assertNull(((AbstractStream) stream1.flatMap(flatSelector)).keySerde());
assertNull(((AbstractStream) stream1.flatMap(flatSelector)).valueSerde());
assertEquals(((AbstractStream) stream1.flatMapValues(flatMapper)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.flatMapValues(flatMapper)).valueSerde());
assertNull(((AbstractStream) stream1.transform(transformerSupplier)).keySerde());
assertNull(((AbstractStream) stream1.transform(transformerSupplier)).valueSerde());
assertEquals(((AbstractStream) stream1.transformValues(valueTransformerSupplier)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.transformValues(valueTransformerSupplier)).valueSerde());
assertNull(((AbstractStream) stream1.merge(stream1)).keySerde());
assertNull(((AbstractStream) stream1.merge(stream1)).valueSerde());
assertEquals(((AbstractStream) stream1.through("topic-3")).keySerde(), consumedInternal.keySerde());
assertEquals(((AbstractStream) stream1.through("topic-3")).valueSerde(), consumedInternal.valueSerde());
assertEquals(((AbstractStream) stream1.through("topic-3", Produced.with(mySerde, mySerde))).keySerde(), mySerde);
assertEquals(((AbstractStream) stream1.through("topic-3", Produced.with(mySerde, mySerde))).valueSerde(), mySerde);
assertEquals(((AbstractStream) stream1.repartition()).keySerde(), consumedInternal.keySerde());
assertEquals(((AbstractStream) stream1.repartition()).valueSerde(), consumedInternal.valueSerde());
assertEquals(((AbstractStream) stream1.repartition(Repartitioned.with(mySerde, mySerde))).keySerde(), mySerde);
assertEquals(((AbstractStream) stream1.repartition(Repartitioned.with(mySerde, mySerde))).valueSerde(), mySerde);
assertEquals(((AbstractStream) stream1.groupByKey()).keySerde(), consumedInternal.keySerde());
assertEquals(((AbstractStream) stream1.groupByKey()).valueSerde(), consumedInternal.valueSerde());
assertEquals(((AbstractStream) stream1.groupByKey(Grouped.with(mySerde, mySerde))).keySerde(), mySerde);
assertEquals(((AbstractStream) stream1.groupByKey(Grouped.with(mySerde, mySerde))).valueSerde(), mySerde);
assertNull(((AbstractStream) stream1.groupBy(selector)).keySerde());
assertEquals(((AbstractStream) stream1.groupBy(selector)).valueSerde(), consumedInternal.valueSerde());
assertEquals(((AbstractStream) stream1.groupBy(selector, Grouped.with(mySerde, mySerde))).keySerde(), mySerde);
assertEquals(((AbstractStream) stream1.groupBy(selector, Grouped.with(mySerde, mySerde))).valueSerde(), mySerde);
assertNull(((AbstractStream) stream1.join(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).keySerde());
assertNull(((AbstractStream) stream1.join(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).valueSerde());
assertEquals(((AbstractStream) stream1.join(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).keySerde(), mySerde);
assertNull(((AbstractStream) stream1.join(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).valueSerde());
assertNull(((AbstractStream) stream1.leftJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).keySerde());
assertNull(((AbstractStream) stream1.leftJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).valueSerde());
assertEquals(((AbstractStream) stream1.leftJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).keySerde(), mySerde);
assertNull(((AbstractStream) stream1.leftJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).valueSerde());
assertNull(((AbstractStream) stream1.outerJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).keySerde());
assertNull(((AbstractStream) stream1.outerJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)))).valueSerde());
assertEquals(((AbstractStream) stream1.outerJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).keySerde(), mySerde);
assertNull(((AbstractStream) stream1.outerJoin(stream1, joiner, JoinWindows.of(Duration.ofMillis(100L)), StreamJoined.with(mySerde, mySerde, mySerde))).valueSerde());
assertEquals(((AbstractStream) stream1.join(table1, joiner)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.join(table1, joiner)).valueSerde());
assertEquals(((AbstractStream) stream1.join(table1, joiner, Joined.with(mySerde, mySerde, mySerde))).keySerde(), mySerde);
assertNull(((AbstractStream) stream1.join(table1, joiner, Joined.with(mySerde, mySerde, mySerde))).valueSerde());
assertEquals(((AbstractStream) stream1.leftJoin(table1, joiner)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.leftJoin(table1, joiner)).valueSerde());
assertEquals(((AbstractStream) stream1.leftJoin(table1, joiner, Joined.with(mySerde, mySerde, mySerde))).keySerde(), mySerde);
assertNull(((AbstractStream) stream1.leftJoin(table1, joiner, Joined.with(mySerde, mySerde, mySerde))).valueSerde());
assertEquals(((AbstractStream) stream1.join(table2, selector, joiner)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.join(table2, selector, joiner)).valueSerde());
assertEquals(((AbstractStream) stream1.leftJoin(table2, selector, joiner)).keySerde(), consumedInternal.keySerde());
assertNull(((AbstractStream) stream1.leftJoin(table2, selector, joiner)).valueSerde());
}
use of org.apache.kafka.streams.kstream.ValueMapper in project kafka by apache.
the class KStreamFlatMapValuesTest method testFlatMapValues.
@Test
public void testFlatMapValues() {
final StreamsBuilder builder = new StreamsBuilder();
final ValueMapper<Number, Iterable<String>> mapper = value -> {
final ArrayList<String> result = new ArrayList<>();
result.add("v" + value);
result.add("V" + value);
return result;
};
final int[] expectedKeys = { 0, 1, 2, 3 };
final KStream<Integer, Integer> stream = builder.stream(topicName, Consumed.with(Serdes.Integer(), Serdes.Integer()));
final MockApiProcessorSupplier<Integer, String, Void, Void> supplier = new MockApiProcessorSupplier<>();
stream.flatMapValues(mapper).process(supplier);
try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) {
final TestInputTopic<Integer, Integer> inputTopic = driver.createInputTopic(topicName, new IntegerSerializer(), new IntegerSerializer(), Instant.ofEpochMilli(0L), Duration.ZERO);
for (final int expectedKey : expectedKeys) {
// passing the timestamp to inputTopic.create to disambiguate the call
inputTopic.pipeInput(expectedKey, expectedKey, 0L);
}
}
final KeyValueTimestamp[] expected = { new KeyValueTimestamp<>(0, "v0", 0), new KeyValueTimestamp<>(0, "V0", 0), new KeyValueTimestamp<>(1, "v1", 0), new KeyValueTimestamp<>(1, "V1", 0), new KeyValueTimestamp<>(2, "v2", 0), new KeyValueTimestamp<>(2, "V2", 0), new KeyValueTimestamp<>(3, "v3", 0), new KeyValueTimestamp<>(3, "V3", 0) };
assertArrayEquals(expected, supplier.theCapturedProcessor().processed().toArray());
}
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