lct45 commented on a change in pull request #9039: URL: https://github.com/apache/kafka/pull/9039#discussion_r468653951
########## File path: streams/src/test/java/org/apache/kafka/streams/kstream/internals/SlidingWindowedKStreamImplTest.java ########## @@ -0,0 +1,387 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.kafka.streams.kstream.internals; + +import org.apache.kafka.common.serialization.Serdes; +import org.apache.kafka.common.serialization.StringSerializer; +import org.apache.kafka.common.utils.Bytes; +import org.apache.kafka.streams.KeyValue; +import org.apache.kafka.streams.StreamsBuilder; +import org.apache.kafka.streams.TopologyTestDriver; +import org.apache.kafka.streams.kstream.Consumed; +import org.apache.kafka.streams.kstream.Grouped; +import org.apache.kafka.streams.kstream.KStream; +import org.apache.kafka.streams.kstream.Materialized; +import org.apache.kafka.streams.kstream.Named; +import org.apache.kafka.streams.kstream.SlidingWindows; +import org.apache.kafka.streams.kstream.TimeWindowedKStream; +import org.apache.kafka.streams.kstream.Windowed; +import org.apache.kafka.streams.state.ValueAndTimestamp; +import org.apache.kafka.streams.state.WindowStore; +import org.apache.kafka.streams.TestInputTopic; +import org.apache.kafka.test.MockAggregator; +import org.apache.kafka.test.MockInitializer; +import org.apache.kafka.test.MockProcessorSupplier; +import org.apache.kafka.test.MockReducer; +import org.apache.kafka.test.StreamsTestUtils; +import org.junit.Before; +import org.junit.Test; + +import java.util.Arrays; +import java.util.List; +import java.util.Properties; + +import static java.time.Duration.ofMillis; +import static java.time.Instant.ofEpochMilli; +import static org.hamcrest.CoreMatchers.equalTo; +import static org.hamcrest.MatcherAssert.assertThat; +import static org.junit.Assert.assertThrows; + +public class SlidingWindowedKStreamImplTest { + + private static final String TOPIC = "input"; + private final StreamsBuilder builder = new StreamsBuilder(); + private final Properties props = StreamsTestUtils.getStreamsConfig(Serdes.String(), Serdes.String()); + private TimeWindowedKStream<String, String> windowedStream; + + @Before + public void before() { + final KStream<String, String> stream = builder.stream(TOPIC, Consumed.with(Serdes.String(), Serdes.String())); + windowedStream = stream. + groupByKey(Grouped.with(Serdes.String(), Serdes.String())) + .windowedBy(SlidingWindows.withTimeDifferenceAndGrace(ofMillis(100L), ofMillis(1000L))); + } + + @Test + public void shouldCountSlidingWindows() { + final MockProcessorSupplier<Windowed<String>, Long> supplier = new MockProcessorSupplier<>(); + windowedStream + .count() + .toStream() + .process(supplier); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + } + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(0L, 100L))), + equalTo(ValueAndTimestamp.make(1L, 100L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(101L, 201L))), + equalTo(ValueAndTimestamp.make(1L, 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make(2L, 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(400L, 500L))), + equalTo(ValueAndTimestamp.make(1L, 500L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(100L, 200L))), + equalTo(ValueAndTimestamp.make(2L, 200L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make(1L, 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(151L, 251L))), + equalTo(ValueAndTimestamp.make(1L, 200L))); + } + + @Test + public void shouldReduceSlidingWindows() { + final MockProcessorSupplier<Windowed<String>, String> supplier = new MockProcessorSupplier<>(); + windowedStream + .reduce(MockReducer.STRING_ADDER) + .toStream() + .process(supplier); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + } + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(0L, 100L))), + equalTo(ValueAndTimestamp.make("1", 100L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(101L, 201L))), + equalTo(ValueAndTimestamp.make("2", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make("1+2", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(400L, 500L))), + equalTo(ValueAndTimestamp.make("3", 500L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(100L, 200L))), + equalTo(ValueAndTimestamp.make("10+20", 200L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make("20", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(151L, 251L))), + equalTo(ValueAndTimestamp.make("10", 200L))); + } + + @Test + public void shouldAggregateSlidingWindows() { + final MockProcessorSupplier<Windowed<String>, String> supplier = new MockProcessorSupplier<>(); + windowedStream + .aggregate( + MockInitializer.STRING_INIT, + MockAggregator.TOSTRING_ADDER, + Materialized.with(Serdes.String(), Serdes.String())) + .toStream() + .process(supplier); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + } + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(0L, 100L))), + equalTo(ValueAndTimestamp.make("0+1", 100L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(101L, 201L))), + equalTo(ValueAndTimestamp.make("0+2", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make("0+1+2", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("1", new TimeWindow(400L, 500L))), + equalTo(ValueAndTimestamp.make("0+3", 500L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(100L, 200L))), + equalTo(ValueAndTimestamp.make("0+10+20", 200L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(50L, 150L))), + equalTo(ValueAndTimestamp.make("0+20", 150L))); + assertThat( + supplier.theCapturedProcessor().lastValueAndTimestampPerKey + .get(new Windowed<>("2", new TimeWindow(151L, 251L))), + equalTo(ValueAndTimestamp.make("0+10", 200L))); + } + + @Test + public void shouldMaterializeCount() { + windowedStream.count( + Materialized.<String, Long, WindowStore<Bytes, byte[]>>as("count-store") + .withKeySerde(Serdes.String()) + .withValueSerde(Serdes.Long())); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + { + final WindowStore<String, Long> windowStore = driver.getWindowStore("count-store"); + final List<KeyValue<Windowed<String>, Long>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), 1L), + KeyValue.pair(new Windowed<>("1", new TimeWindow(50, 150)), 2L), + KeyValue.pair(new Windowed<>("1", new TimeWindow(101, 201)), 1L), + KeyValue.pair(new Windowed<>("1", new TimeWindow(400, 500)), 1L), + KeyValue.pair(new Windowed<>("2", new TimeWindow(50, 150)), 1L), + KeyValue.pair(new Windowed<>("2", new TimeWindow(100, 200)), 2L), + KeyValue.pair(new Windowed<>("2", new TimeWindow(151, 251)), 1L)))); + } + { + final WindowStore<String, ValueAndTimestamp<Long>> windowStore = + driver.getTimestampedWindowStore("count-store"); + final List<KeyValue<Windowed<String>, ValueAndTimestamp<Long>>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), ValueAndTimestamp.make(1L, 100L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(50, 150)), ValueAndTimestamp.make(2L, 150L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(101, 201)), ValueAndTimestamp.make(1L, 150L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(400, 500)), ValueAndTimestamp.make(1L, 500L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(50, 150)), ValueAndTimestamp.make(1L, 150L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(100, 200)), ValueAndTimestamp.make(2L, 200L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(151, 251)), ValueAndTimestamp.make(1L, 200L))))); + } + } + } + + @Test + public void shouldMaterializeReduced() { + windowedStream.reduce( + MockReducer.STRING_ADDER, + Materialized.<String, String, WindowStore<Bytes, byte[]>>as("reduced") + .withKeySerde(Serdes.String()) + .withValueSerde(Serdes.String())); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + { + final WindowStore<String, String> windowStore = driver.getWindowStore("reduced"); + final List<KeyValue<Windowed<String>, String>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), "1"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(50, 150)), "1+2"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(101, 201)), "2"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(400, 500)), "3"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(50, 150)), "20"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(100, 200)), "10+20"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(151, 251)), "10")))); + } + { + final WindowStore<String, ValueAndTimestamp<Long>> windowStore = + driver.getTimestampedWindowStore("reduced"); + final List<KeyValue<Windowed<String>, ValueAndTimestamp<Long>>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), ValueAndTimestamp.make("1", 100L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(50, 150)), ValueAndTimestamp.make("1+2", 150L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(101, 201)), ValueAndTimestamp.make("2", 150L)), + KeyValue.pair(new Windowed<>("1", new TimeWindow(400, 500)), ValueAndTimestamp.make("3", 500L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(50, 150)), ValueAndTimestamp.make("20", 150L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(100, 200)), ValueAndTimestamp.make("10+20", 200L)), + KeyValue.pair(new Windowed<>("2", new TimeWindow(151, 251)), ValueAndTimestamp.make("10", 200L))))); + } + } + } + + @Test + public void shouldMaterializeAggregated() { + windowedStream.aggregate( + MockInitializer.STRING_INIT, + MockAggregator.TOSTRING_ADDER, + Materialized.<String, String, WindowStore<Bytes, byte[]>>as("aggregated") + .withKeySerde(Serdes.String()) + .withValueSerde(Serdes.String())); + + try (final TopologyTestDriver driver = new TopologyTestDriver(builder.build(), props)) { + processData(driver); + { + final WindowStore<String, String> windowStore = driver.getWindowStore("aggregated"); + final List<KeyValue<Windowed<String>, String>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), "0+1"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(50, 150)), "0+1+2"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(101, 201)), "0+2"), + KeyValue.pair(new Windowed<>("1", new TimeWindow(400, 500)), "0+3"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(50, 150)), "0+20"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(100, 200)), "0+10+20"), + KeyValue.pair(new Windowed<>("2", new TimeWindow(151, 251)), "0+10")))); + } + { + final WindowStore<String, ValueAndTimestamp<Long>> windowStore = + driver.getTimestampedWindowStore("aggregated"); + final List<KeyValue<Windowed<String>, ValueAndTimestamp<Long>>> data = + StreamsTestUtils.toList(windowStore.fetch("1", "2", ofEpochMilli(0), ofEpochMilli(1000L))); + + assertThat(data, equalTo(Arrays.asList( + KeyValue.pair(new Windowed<>("1", new TimeWindow(0, 100)), ValueAndTimestamp.make("0+1", 100L)), Review comment: I pulled it out for all except one, because there's one call to `windowStore` that returns a `<Windowed<String>, Long>` and the other calls to `windowStore` return a `<Windowed<String>, String>` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
