X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Ftest%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationTests.java;h=b5644b6ff9dce68844c10e4427b54bc5426e47b8;hb=refs%2Fheads%2Fspringified-consumer--serialization;hp=994d6572c73744cc5e6bbf3b003aa21d0f5f81c6;hpb=fb966920f18413076a28876ffcd125c84f9a6f06;p=demos%2Fkafka%2Ftraining diff --git a/src/test/java/de/juplo/kafka/ApplicationTests.java b/src/test/java/de/juplo/kafka/ApplicationTests.java index 994d657..b5644b6 100644 --- a/src/test/java/de/juplo/kafka/ApplicationTests.java +++ b/src/test/java/de/juplo/kafka/ApplicationTests.java @@ -6,10 +6,8 @@ import org.apache.kafka.clients.consumer.KafkaConsumer; import org.apache.kafka.clients.producer.KafkaProducer; import org.apache.kafka.clients.producer.ProducerRecord; import org.apache.kafka.common.TopicPartition; -import org.apache.kafka.common.serialization.BytesDeserializer; -import org.apache.kafka.common.serialization.BytesSerializer; -import org.apache.kafka.common.serialization.LongSerializer; -import org.apache.kafka.common.serialization.StringSerializer; +import org.apache.kafka.common.errors.RecordDeserializationException; +import org.apache.kafka.common.serialization.*; import org.apache.kafka.common.utils.Bytes; import org.junit.jupiter.api.*; import org.springframework.beans.factory.annotation.Autowired; @@ -17,23 +15,24 @@ import org.springframework.boot.test.context.ConfigDataApplicationContextInitial import org.springframework.boot.test.context.TestConfiguration; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Import; +import org.springframework.kafka.support.serializer.JsonSerializer; import org.springframework.kafka.test.context.EmbeddedKafka; import org.springframework.test.context.TestPropertySource; import org.springframework.test.context.junit.jupiter.SpringJUnitConfig; import java.time.Duration; +import java.time.LocalDateTime; import java.util.*; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.function.BiConsumer; import java.util.function.Consumer; -import java.util.function.Function; import java.util.stream.Collectors; import java.util.stream.IntStream; import static de.juplo.kafka.ApplicationTests.PARTITIONS; import static de.juplo.kafka.ApplicationTests.TOPIC; -import static org.assertj.core.api.Assertions.assertThat; +import static org.assertj.core.api.Assertions.*; import static org.awaitility.Awaitility.*; @@ -42,7 +41,8 @@ import static org.awaitility.Awaitility.*; @TestPropertySource( properties = { "consumer.bootstrap-server=${spring.embedded.kafka.brokers}", - "consumer.topic=" + TOPIC }) + "consumer.topic=" + TOPIC, + "consumer.commit-interval=1s" }) @EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS) @Slf4j class ApplicationTests @@ -52,12 +52,13 @@ class ApplicationTests StringSerializer stringSerializer = new StringSerializer(); - LongSerializer longSerializer = new LongSerializer(); + @Autowired + Serializer valueSerializer; @Autowired KafkaProducer kafkaProducer; @Autowired - KafkaConsumer kafkaConsumer; + KafkaConsumer kafkaConsumer; @Autowired KafkaConsumer offsetConsumer; @Autowired @@ -65,51 +66,167 @@ class ApplicationTests @Autowired ExecutorService executor; - Consumer> testHandler; - EndlessConsumer endlessConsumer; + Consumer> testHandler; + EndlessConsumer endlessConsumer; Map oldOffsets; Map newOffsets; + Set> receivedRecords; /** Tests methods */ @Test - @Order(1) // << The poistion pill is not skipped. Hence, this test must run first - void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException + void commitsCurrentOffsetsOnSuccess() { - send100Messages(i -> new Bytes(longSerializer.serialize(TOPIC, i))); + send100Messages((partition, key, counter) -> + { + Bytes value; + String type; - Set> received = new HashSet<>(); - testHandler = record -> received.add(record); + if (counter%3 != 0) + { + value = serializeClientMessage(key, counter); + type = "message"; + } + else { + value = serializeGreeting(key); + type = "greeting"; + } + + return toRecord(partition, key, value, Optional.of(type)); + }); await("100 records received") .atMost(Duration.ofSeconds(30)) - .until(() -> received.size() >= 100); + .pollInterval(Duration.ofSeconds(1)) + .until(() -> receivedRecords.size() >= 100); await("Offsets committed") .atMost(Duration.ofSeconds(10)) + .pollInterval(Duration.ofSeconds(1)) .untilAsserted(() -> { checkSeenOffsetsForProgress(); compareToCommitedOffsets(newOffsets); }); + + assertThatExceptionOfType(IllegalStateException.class) + .isThrownBy(() -> endlessConsumer.exitStatus()) + .describedAs("Consumer should still be running"); } @Test - @Order(2) - void commitsOffsetOfErrorForReprocessingOnError() + void commitsOffsetOfErrorForReprocessingOnDeserializationErrorInvalidMessage() { - send100Messages(counter -> - counter == 77 - ? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!")) - : new Bytes(longSerializer.serialize(TOPIC, counter))); + send100Messages((partition, key, counter) -> + { + Bytes value; + String type; + + if (counter == 77) + { + value = serializeFooMessage(key, counter); + type = null; + } + else + { + if (counter%3 != 0) + { + value = serializeClientMessage(key, counter); + type = "message"; + } + else { + value = serializeGreeting(key); + type = "greeting"; + } + } + + return toRecord(partition, key, value, Optional.ofNullable(type)); + }); + + await("Consumer failed") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> !endlessConsumer.running()); + + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + + endlessConsumer.start(); + await("Consumer failed") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> !endlessConsumer.running()); + + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + assertThat(receivedRecords.size()) + .describedAs("Received not all sent events") + .isLessThan(100); + + assertThatNoException() + .describedAs("Consumer should not be running") + .isThrownBy(() -> endlessConsumer.exitStatus()); + assertThat(endlessConsumer.exitStatus()) + .describedAs("Consumer should have exited abnormally") + .containsInstanceOf(RecordDeserializationException.class); + } + + @Test + void commitsOffsetOfErrorForReprocessingOnDeserializationErrorOnUnknownMessage() + { + send100Messages((partition, key, counter) -> + { + Bytes value; + String type; + + if (counter == 77) + { + value = serializeFooMessage(key, counter); + type = "foo"; + } + else + { + if (counter%3 != 0) + { + value = serializeClientMessage(key, counter); + type = "message"; + } + else { + value = serializeGreeting(key); + type = "greeting"; + } + } + + return toRecord(partition, key, value, Optional.of(type)); + }); await("Consumer failed") .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) .until(() -> !endlessConsumer.running()); checkSeenOffsetsForProgress(); compareToCommitedOffsets(newOffsets); + + endlessConsumer.start(); + await("Consumer failed") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> !endlessConsumer.running()); + + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + assertThat(receivedRecords.size()) + .describedAs("Received not all sent events") + .isLessThan(100); + + assertThatNoException() + .describedAs("Consumer should not be running") + .isThrownBy(() -> endlessConsumer.exitStatus()); + assertThat(endlessConsumer.exitStatus()) + .describedAs("Consumer should have exited abnormally") + .containsInstanceOf(RecordDeserializationException.class); } @@ -121,7 +238,9 @@ class ApplicationTests { Long expected = offsetsToCheck.get(tp) + 1; log.debug("Checking, if the offset for {} is {}", tp, expected); - assertThat(offset).isEqualTo(expected); + assertThat(offset) + .describedAs("Committed offset corresponds to the offset of the consumer") + .isEqualTo(expected); }); } @@ -131,20 +250,37 @@ class ApplicationTests Set withProgress = new HashSet<>(); partitions().forEach(tp -> { - Long oldOffset = oldOffsets.get(tp); - Long newOffset = newOffsets.get(tp); + Long oldOffset = oldOffsets.get(tp) + 1; + Long newOffset = newOffsets.get(tp) + 1; if (!oldOffset.equals(newOffset)) { log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset); withProgress.add(tp); } }); - assertThat(withProgress).isNotEmpty().describedAs("Found no partitions with any offset-progress"); + assertThat(withProgress) + .describedAs("Some offsets must have changed, compared to the old offset-positions") + .isNotEmpty(); } /** Helper methods for setting up and running the tests */ + void seekToEnd() + { + offsetConsumer.assign(partitions()); + offsetConsumer.seekToEnd(partitions()); + partitions().forEach(tp -> + { + // seekToEnd() works lazily: it only takes effect on poll()/position() + Long offset = offsetConsumer.position(tp); + log.info("New position for {}: {}", tp, offset); + }); + // The new positions must be commited! + offsetConsumer.commitSync(); + offsetConsumer.unsubscribe(); + } + void doForCurrentOffsets(BiConsumer consumer) { offsetConsumer.assign(partitions()); @@ -162,22 +298,21 @@ class ApplicationTests } - void send100Messages(Function messageGenerator) + public interface RecordGenerator { - long i = 0; + public ProducerRecord generate(int partition, String key, int counter); + } + + void send100Messages(RecordGenerator recordGenerator) + { + int i = 0; for (int partition = 0; partition < 10; partition++) { for (int key = 0; key < 10; key++) { - Bytes value = messageGenerator.apply(++i); - ProducerRecord record = - new ProducerRecord<>( - TOPIC, - partition, - Integer.toString(key%2), - value); + recordGenerator.generate(partition, Integer.toString(partition*10+key%2), ++i); kafkaProducer.send(record, (metadata, e) -> { @@ -203,14 +338,43 @@ class ApplicationTests } } + ProducerRecord toRecord(int partition, String key, Bytes value, Optional type) + { + ProducerRecord record = + new ProducerRecord<>(TOPIC, partition, key, value); + + type.ifPresent(typeId -> record.headers().add("__TypeId__", typeId.getBytes())); + return record; + } + + Bytes serializeClientMessage(String key, int value) + { + TestClientMessage message = new TestClientMessage(key, Integer.toString(value)); + return new Bytes(valueSerializer.serialize(TOPIC, message)); + } + + Bytes serializeGreeting(String key) + { + TestGreeting message = new TestGreeting(key, LocalDateTime.now()); + return new Bytes(valueSerializer.serialize(TOPIC, message)); + } + + Bytes serializeFooMessage(String key, int value) + { + TestFooMessage message = new TestFooMessage(key, (long)value); + return new Bytes(valueSerializer.serialize(TOPIC, message)); + } @BeforeEach public void init() { testHandler = record -> {} ; + seekToEnd(); + oldOffsets = new HashMap<>(); newOffsets = new HashMap<>(); + receivedRecords = new HashSet<>(); doForCurrentOffsets((tp, offset) -> { @@ -218,12 +382,13 @@ class ApplicationTests newOffsets.put(tp, offset - 1); }); - Consumer> captureOffsetAndExecuteTestHandler = + Consumer> captureOffsetAndExecuteTestHandler = record -> { newOffsets.put( new TopicPartition(record.topic(), record.partition()), record.offset()); + receivedRecords.add(record); testHandler.accept(record); }; @@ -256,6 +421,12 @@ class ApplicationTests @Import(ApplicationConfiguration.class) public static class Configuration { + @Bean + Serializer serializer() + { + return new JsonSerializer<>(); + } + @Bean KafkaProducer kafkaProducer(ApplicationProperties properties) {