X-Git-Url: http://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Ftest%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationTests.java;h=c3fbe45724281fb38ab05cbc4de87b8b226472ac;hb=bf6e53f9941724fffeb9e254937bd261c028f666;hp=d446bbed8a922c5542beb86bc28a04f1c4a5080a;hpb=d8f4e839b57b8405ca909b5472a8d4639937a101;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 d446bbe..c3fbe45 100644 --- a/src/test/java/de/juplo/kafka/ApplicationTests.java +++ b/src/test/java/de/juplo/kafka/ApplicationTests.java @@ -1,32 +1,33 @@ package de.juplo.kafka; +import lombok.Value; import lombok.extern.slf4j.Slf4j; -import org.apache.kafka.clients.consumer.ConsumerRecord; 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.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; +import org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration; import org.springframework.boot.autoconfigure.kafka.KafkaProperties; import org.springframework.boot.test.context.ConfigDataApplicationContextInitializer; import org.springframework.boot.test.context.TestConfiguration; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Import; +import org.springframework.context.annotation.Primary; +import org.springframework.kafka.listener.adapter.ConsumerRecordMetadata; +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.function.BiFunction; import java.util.stream.Collectors; import java.util.stream.IntStream; @@ -36,11 +37,16 @@ import static org.assertj.core.api.Assertions.*; import static org.awaitility.Awaitility.*; -@SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class) -@TestMethodOrder(MethodOrderer.OrderAnnotation.class) +@SpringJUnitConfig( + initializers = ConfigDataApplicationContextInitializer.class, + classes = { + EndlessConsumer.class, + KafkaAutoConfiguration.class, + ApplicationTests.Configuration.class }) @TestPropertySource( properties = { "spring.kafka.consumer.bootstrap-servers=${spring.embedded.kafka.brokers}", + "spring.kafka.producer.bootstrap-servers=${spring.embedded.kafka.brokers}", "consumer.topic=" + TOPIC }) @EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS) @Slf4j @@ -50,41 +56,64 @@ class ApplicationTests public static final int PARTITIONS = 10; - StringSerializer stringSerializer = new StringSerializer(); - @Autowired Serializer valueSerializer; @Autowired KafkaProducer kafkaProducer; @Autowired - KafkaConsumer kafkaConsumer; - @Autowired KafkaConsumer offsetConsumer; @Autowired ApplicationProperties applicationProperties; @Autowired KafkaProperties kafkaProperties; @Autowired - ExecutorService executor; + EndlessConsumer endlessConsumer; + @Autowired + MessageHandler clientMessageHandler; + @Autowired + MessageHandler greetingsHandler; - Consumer> testHandler; - EndlessConsumer endlessConsumer; Map oldOffsets; Map newOffsets; - Set> receivedRecords; + Set received; /** 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((key, counter) -> serializeAsClientMessage(key, counter)); + + await("100 records received") + .atMost(Duration.ofSeconds(30)) + .until(() -> received.size() == 100); + + await("Offsets committed") + .atMost(Duration.ofSeconds(10)) + .untilAsserted(() -> + { + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + }); + + assertThat(endlessConsumer.isRunning()) + .describedAs("Consumer should still be running") + .isTrue(); + } + + + @Test + void mixedMessages() { - send100Messages(i -> new Bytes(valueSerializer.serialize(TOPIC, i))); + send100Messages((key, counter) -> + counter%3 == 0 + ? serializeAsGreeting(key) + : serializeAsClientMessage(key, counter)); await("100 records received") .atMost(Duration.ofSeconds(30)) - .until(() -> receivedRecords.size() >= 100); + .until(() -> received.size() == 100); await("Offsets committed") .atMost(Duration.ofSeconds(10)) @@ -94,44 +123,70 @@ class ApplicationTests compareToCommitedOffsets(newOffsets); }); - assertThatExceptionOfType(IllegalStateException.class) - .isThrownBy(() -> endlessConsumer.exitStatus()) - .describedAs("Consumer should still be running"); + assertThat(endlessConsumer.isRunning()) + .describedAs("Consumer should still be running") + .isTrue(); } @Test - @Order(2) - void commitsOffsetOfErrorForReprocessingOnError() + void commitsCurrentOffsetsOnDeserializationError() { - send100Messages(counter -> + send100Messages((key, counter) -> counter == 77 - ? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!")) - : new Bytes(valueSerializer.serialize(TOPIC, counter))); + ? serializeString("BOOM!", "message") + : serializeAsClientMessage(key, counter)); - await("Consumer failed") + await("99 records received") .atMost(Duration.ofSeconds(30)) - .until(() -> !endlessConsumer.running()); + .until(() -> received.size() == 99); - checkSeenOffsetsForProgress(); - compareToCommitedOffsets(newOffsets); + await("Offsets committed") + .atMost(Duration.ofSeconds(10)) + .untilAsserted(() -> + { + // UNSCHÖN: + // Funktioniert nur, weil nach der Nachrichten, die den + // Deserialisierungs-Fehler auslöst noch valide Nachrichten + // gelesen werden. + // GRUND: + // Der MessageHandler sieht den Offset der Fehlerhaften + // Nachricht nicht! + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + }); - endlessConsumer.start(); - await("Consumer failed") + assertThat(endlessConsumer.isRunning()) + .describedAs("Consumer should still be running") + .isTrue(); + } + + @Test + void commitsOffsetOnProgramLogicErrorFoo() + { + clientMessageHandler.testHandler = (clientMessage, metadata) -> + { + if (Integer.parseInt(clientMessage.message)%10 ==0) + throw new RuntimeException("BOOM: " + clientMessage.message + "%10 == 0"); + }; + + send100Messages((key, counter) -> serializeAsClientMessage(key, counter)); + + await("80 records received") .atMost(Duration.ofSeconds(30)) - .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); + .until(() -> received.size() == 100); + + await("Offsets committed") + .atMost(Duration.ofSeconds(10)) + .pollDelay(Duration.ofSeconds(1)) + .untilAsserted(() -> + { + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(newOffsets); + }); + + assertThat(endlessConsumer.isRunning()) + .describedAs("Consumer should still be running") + .isTrue(); } @@ -142,7 +197,7 @@ class ApplicationTests doForCurrentOffsets((tp, offset) -> { Long expected = offsetsToCheck.get(tp) + 1; - log.debug("Checking, if the offset for {} is {}", tp, expected); + log.debug("TEST: Comparing the expected offset of {} for {} to {}", expected, tp, offset); assertThat(offset) .describedAs("Committed offset corresponds to the offset of the consumer") .isEqualTo(expected); @@ -159,10 +214,11 @@ class ApplicationTests Long newOffset = newOffsets.get(tp); if (!oldOffset.equals(newOffset)) { - log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset); + log.debug("TEST: Progress for {}: {} -> {}", tp, oldOffset, newOffset); withProgress.add(tp); } }); + log.debug("TEST: Offsets with progress: {}", withProgress); assertThat(withProgress) .describedAs("Some offsets must have changed, compared to the old offset-positions") .isNotEmpty(); @@ -188,7 +244,7 @@ class ApplicationTests } - void send100Messages(Function messageGenerator) + void send100Messages(BiFunction recordGenerator) { long i = 0; @@ -196,21 +252,22 @@ class ApplicationTests { for (int key = 0; key < 10; key++) { - Bytes value = messageGenerator.apply(++i); + BytesAndType bat = recordGenerator.apply(key, ++i); ProducerRecord record = new ProducerRecord<>( TOPIC, partition, Integer.toString(key%2), - value); + bat.getValue()); + record.headers().add("__TypeId__", bat.getType()); kafkaProducer.send(record, (metadata, e) -> { if (metadata != null) { log.debug( - "{}|{} - {}={}", + "TEST: Sending partition={}, offset={} - {}={}", metadata.partition(), metadata.offset(), record.key(), @@ -219,7 +276,7 @@ class ApplicationTests else { log.warn( - "Exception for {}={}: {}", + "TEST: Exception for {}={}: {}", record.key(), record.value(), e.toString()); @@ -229,15 +286,42 @@ class ApplicationTests } } + BytesAndType serializeAsClientMessage(Integer key, Long value) + { + ClientMessage message = new ClientMessage(); + message.setClient(key.toString()); + message.setMessage(value.toString()); + return new BytesAndType(serialize(message), "message"); + } + + BytesAndType serializeAsGreeting(Integer key) + { + Greeting greeting = new Greeting(); + greeting.setName(key.toString()); + greeting.setWhen(LocalDateTime.now()); + return new BytesAndType(serialize(greeting), "greeting"); + } + + BytesAndType serializeString(String message, String messageType) + { + return new BytesAndType(new Bytes(message.getBytes()), messageType); + } + + Bytes serialize(Object message) + { + return new Bytes(valueSerializer.serialize(TOPIC, message)); + } + @BeforeEach public void init() { - testHandler = record -> {} ; + clientMessageHandler.testHandler = (clientMessage, metadata) -> {}; + greetingsHandler.testHandler = (greeting, metadata) -> {}; oldOffsets = new HashMap<>(); newOffsets = new HashMap<>(); - receivedRecords = new HashSet<>(); + received = new HashSet<>(); doForCurrentOffsets((tp, offset) -> { @@ -245,23 +329,19 @@ class ApplicationTests newOffsets.put(tp, offset - 1); }); - Consumer> captureOffsetAndExecuteTestHandler = - record -> + BiConsumer captureOffsets = + (clientMessage, metadata) -> { + received.add(clientMessage); + log.debug("TEST: Processing record #{}: {}", received.size(), clientMessage); newOffsets.put( - new TopicPartition(record.topic(), record.partition()), - record.offset()); - receivedRecords.add(record); - testHandler.accept(record); + new TopicPartition(metadata.topic(), metadata.partition()), metadata.offset()); }; - endlessConsumer = - new EndlessConsumer<>( - executor, - kafkaProperties.getConsumer().getClientId(), - applicationProperties.getTopic(), - kafkaConsumer, - captureOffsetAndExecuteTestHandler); + clientMessageHandler.captureOffsets = + (BiConsumer)captureOffsets; + greetingsHandler.captureOffsets = + (BiConsumer)captureOffsets; endlessConsumer.start(); } @@ -275,19 +355,47 @@ class ApplicationTests } catch (Exception e) { - log.info("Exception while stopping the consumer: {}", e.toString()); + log.info("TEST: Exception while stopping the consumer: {}", e.toString()); } } + public static class MessageHandler implements BiConsumer + { + BiConsumer captureOffsets; + BiConsumer testHandler; + + + @Override + public void accept(T message, ConsumerRecordMetadata metadata) + { + captureOffsets + .andThen(testHandler) + .accept(message, metadata); + } + } @TestConfiguration @Import(ApplicationConfiguration.class) public static class Configuration { + @Primary + @Bean + public MessageHandler messageHandler() + { + return new MessageHandler<>(); + } + + @Primary @Bean - Serializer serializer() + public MessageHandler greetingsHandler() { - return new LongSerializer(); + return new MessageHandler<>(); + } + + @Bean + Serializer serializer() + { + return new JsonSerializer<>(); } @Bean @@ -315,4 +423,19 @@ class ApplicationTests return new KafkaConsumer<>(props); } } + + + @Value + static class BytesAndType + { + private final Bytes value; + private final byte[] type; + + + BytesAndType(Bytes value, String type) + { + this.value = value; + this.type = type.getBytes(); + } + } }