From: Kai Moritz Date: Sun, 14 Aug 2022 18:52:49 +0000 (+0200) Subject: Verbesserte Tests und Korrekturen gemerged: sumup-adder -> stored-offsets X-Git-Url: https://juplo.de/gitweb/?a=commitdiff_plain;h=f1eec82fb197f9fc7906eb9a90d75468e9e4356f;hp=824f55bc813acebd4ea67ccf7f22518a31351076;p=demos%2Fkafka%2Ftraining Verbesserte Tests und Korrekturen gemerged: sumup-adder -> stored-offsets --- diff --git a/README.sh b/README.sh index b7bce99..133af42 100755 --- a/README.sh +++ b/README.sh @@ -16,7 +16,8 @@ if [[ "$1" = "build" ]] then - mvn install || exit + docker-compose rm -svf peter beate + mvn clean install || exit else echo "Using image existing images:" docker image ls $IMAGE diff --git a/pom.xml b/pom.xml index 701704d..fa78c70 100644 --- a/pom.xml +++ b/pom.xml @@ -16,6 +16,10 @@ 1.0-SNAPSHOT Endless Consumer: a Simple Consumer-Group that reads and prints the topic and counts the received messages for each key by topic + + 11 + + org.springframework.boot diff --git a/src/main/java/de/juplo/kafka/ApplicationRebalanceListener.java b/src/main/java/de/juplo/kafka/ApplicationRebalanceListener.java index 59b420a..444b7b7 100644 --- a/src/main/java/de/juplo/kafka/ApplicationRebalanceListener.java +++ b/src/main/java/de/juplo/kafka/ApplicationRebalanceListener.java @@ -25,6 +25,7 @@ public class ApplicationRebalanceListener implements PollIntervalAwareConsumerRe private final Consumer consumer; private Instant lastCommit = Instant.EPOCH; + private boolean commitsEnabled = true; @Override public void onPartitionsAssigned(Collection partitions) @@ -59,8 +60,15 @@ public class ApplicationRebalanceListener implements PollIntervalAwareConsumerRe id, partition, offset); - Map removed = recordHandler.removePartition(partition); - stateRepository.save(new StateDocument(partition, removed, offset)); + if (commitsEnabled) + { + Map removed = recordHandler.removePartition(partition); + stateRepository.save(new StateDocument(partition, removed, offset)); + } + else + { + log.info("Offset commits are disabled! Last commit: {}", lastCommit); + } }); } @@ -68,6 +76,12 @@ public class ApplicationRebalanceListener implements PollIntervalAwareConsumerRe @Override public void beforeNextPoll() { + if (!commitsEnabled) + { + log.info("Offset commits are disabled! Last commit: {}", lastCommit); + return; + } + if (lastCommit.plus(commitInterval).isBefore(clock.instant())) { log.debug("Storing data and offsets, last commit: {}", lastCommit); @@ -79,4 +93,16 @@ public class ApplicationRebalanceListener implements PollIntervalAwareConsumerRe lastCommit = clock.instant(); } } + + @Override + public void enableCommits() + { + commitsEnabled = true; + } + + @Override + public void disableCommits() + { + commitsEnabled = false; + } } diff --git a/src/main/java/de/juplo/kafka/EndlessConsumer.java b/src/main/java/de/juplo/kafka/EndlessConsumer.java index 17778be..58374f4 100644 --- a/src/main/java/de/juplo/kafka/EndlessConsumer.java +++ b/src/main/java/de/juplo/kafka/EndlessConsumer.java @@ -42,6 +42,7 @@ public class EndlessConsumer implements Runnable try { log.info("{} - Subscribing to topic {}", id, topic); + rebalanceListener.enableCommits(); consumer.subscribe(Arrays.asList(topic), rebalanceListener); while (true) @@ -91,7 +92,8 @@ public class EndlessConsumer implements Runnable } catch(Exception e) { - log.error("{} - Unexpected error: {}", id, e.toString(), e); + log.error("{} - Unexpected error: {}, disabling commits", id, e.toString(), e); + rebalanceListener.disableCommits(); shutdown(e); } finally diff --git a/src/main/java/de/juplo/kafka/PollIntervalAwareConsumerRebalanceListener.java b/src/main/java/de/juplo/kafka/PollIntervalAwareConsumerRebalanceListener.java index 8abec12..c59418c 100644 --- a/src/main/java/de/juplo/kafka/PollIntervalAwareConsumerRebalanceListener.java +++ b/src/main/java/de/juplo/kafka/PollIntervalAwareConsumerRebalanceListener.java @@ -6,4 +6,7 @@ import org.apache.kafka.clients.consumer.ConsumerRebalanceListener; public interface PollIntervalAwareConsumerRebalanceListener extends ConsumerRebalanceListener { default void beforeNextPoll() {} + + default void enableCommits() {} + default void disableCommits() {} } diff --git a/src/test/java/de/juplo/kafka/ApplicationTests.java b/src/test/java/de/juplo/kafka/ApplicationTests.java index 1f18e59..5166227 100644 --- a/src/test/java/de/juplo/kafka/ApplicationTests.java +++ b/src/test/java/de/juplo/kafka/ApplicationTests.java @@ -1,357 +1,92 @@ package de.juplo.kafka; -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.serialization.LongSerializer; +import org.apache.kafka.common.serialization.StringSerializer; import org.apache.kafka.common.utils.Bytes; -import org.junit.jupiter.api.*; -import org.springframework.beans.factory.annotation.Autowired; -import org.springframework.boot.autoconfigure.EnableAutoConfiguration; -import org.springframework.boot.test.autoconfigure.data.mongo.AutoConfigureDataMongo; -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.kafka.test.context.EmbeddedKafka; -import org.springframework.test.context.TestPropertySource; -import org.springframework.test.context.junit.jupiter.SpringJUnitConfig; +import org.springframework.context.annotation.Primary; +import org.springframework.test.context.ContextConfiguration; -import java.time.Duration; -import java.util.*; -import java.util.concurrent.ExecutionException; -import java.util.concurrent.ExecutorService; -import java.util.function.BiConsumer; -import java.util.stream.Collectors; -import java.util.stream.IntStream; +import java.util.function.Consumer; -import static de.juplo.kafka.ApplicationTests.PARTITIONS; -import static de.juplo.kafka.ApplicationTests.TOPIC; -import static org.assertj.core.api.Assertions.*; -import static org.awaitility.Awaitility.*; - -@SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class) -@TestMethodOrder(MethodOrderer.OrderAnnotation.class) -@TestPropertySource( - properties = { - "consumer.bootstrap-server=${spring.embedded.kafka.brokers}", - "consumer.topic=" + TOPIC, - "consumer.commit-interval=1s", - "spring.mongodb.embedded.version=4.4.13" }) -@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS) -@EnableAutoConfiguration -@AutoConfigureDataMongo -@Slf4j -class ApplicationTests +@ContextConfiguration(classes = ApplicationTests.Configuration.class) +public class ApplicationTests extends GenericApplicationTests { - public static final String TOPIC = "FOO"; - public static final int PARTITIONS = 10; - - - StringSerializer stringSerializer = new StringSerializer(); - - @Autowired - Serializer valueSerializer; - @Autowired - KafkaProducer kafkaProducer; - @Autowired - KafkaConsumer kafkaConsumer; - @Autowired - KafkaConsumer offsetConsumer; - @Autowired - ApplicationProperties properties; - @Autowired - ExecutorService executor; - @Autowired - StateRepository stateRepository; - @Autowired - ApplicationRebalanceListener rebalanceListener; - @Autowired - ApplicationRecordHandler recordHandler; - - EndlessConsumer endlessConsumer; - Map oldOffsets; - Map newOffsets; - Set> receivedRecords; - - - /** Tests methods */ - - @Test - void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException - { - send100Messages((partition, key, counter) -> - { - Bytes value = new Bytes(valueSerializer.serialize(TOPIC, counter)); - return new ProducerRecord<>(TOPIC, partition, key, value); - }); - - await("100 records received") - .atMost(Duration.ofSeconds(30)) - .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 - void commitsOffsetOfErrorForReprocessingOnDeserializationError() - { - send100Messages((partition, key, counter) -> - { - Bytes value = counter == 77 - ? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!")) - : new Bytes(valueSerializer.serialize(TOPIC, counter)); - return new ProducerRecord<>(TOPIC, partition, key, value); - }); - - 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); - } - - - /** Helper methods for the verification of expectations */ - - void compareToCommitedOffsets(Map offsetsToCheck) - { - doForCurrentOffsets((tp, offset) -> - { - Long expected = offsetsToCheck.get(tp) + 1; - log.debug("Checking, if the offset for {} is {}", tp, expected); - assertThat(offset) - .describedAs("Committed offset corresponds to the offset of the consumer") - .isEqualTo(expected); - }); - } - - void checkSeenOffsetsForProgress() - { - // Be sure, that some messages were consumed...! - Set withProgress = new HashSet<>(); - partitions().forEach(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) - .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()); - partitions().forEach(tp -> - { - Long offset = offsetConsumer.position(tp); - log.info("New position for {}: {}", tp, offset); - Integer partition = tp.partition(); - StateDocument document = - stateRepository - .findById(partition.toString()) - .orElse(new StateDocument(partition)); - document.offset = offset; - stateRepository.save(document); - }); - offsetConsumer.unsubscribe(); - } - - void doForCurrentOffsets(BiConsumer consumer) - { - partitions().forEach(tp -> - { - String partition = Integer.toString(tp.partition()); - Optional offset = stateRepository.findById(partition).map(document -> document.offset); - consumer.accept(tp, offset.orElse(0l)); - }); - } - - List partitions() - { - return - IntStream - .range(0, PARTITIONS) - .mapToObj(partition -> new TopicPartition(TOPIC, partition)) - .collect(Collectors.toList()); - } - - - public interface RecordGenerator - { - public ProducerRecord generate(int partition, String key, long counter); - } - - void send100Messages(RecordGenerator recordGenerator) - { - long i = 0; - - for (int partition = 0; partition < 10; partition++) - { - for (int key = 0; key < 10; key++) - { - ProducerRecord record = - recordGenerator.generate(partition, Integer.toString(partition*10+key%2), ++i); - - kafkaProducer.send(record, (metadata, e) -> - { - if (metadata != null) - { - log.debug( - "{}|{} - {}={}", - metadata.partition(), - metadata.offset(), - record.key(), - record.value()); - } - else - { - log.warn( - "Exception for {}={}: {}", - record.key(), - record.value(), - e.toString()); - } - }); - } - } - } - - - @BeforeEach - public void init() - { - seekToEnd(); - - oldOffsets = new HashMap<>(); - newOffsets = new HashMap<>(); - receivedRecords = new HashSet<>(); - - doForCurrentOffsets((tp, offset) -> - { - oldOffsets.put(tp, offset - 1); - newOffsets.put(tp, offset - 1); - }); - - TestRecordHandler captureOffsetAndExecuteTestHandler = - new TestRecordHandler(recordHandler) { - @Override - public void onNewRecord(ConsumerRecord record) - { - newOffsets.put( - new TopicPartition(record.topic(), record.partition()), - record.offset()); - receivedRecords.add(record); - } - }; - - endlessConsumer = - new EndlessConsumer<>( - executor, - properties.getClientId(), - properties.getTopic(), - kafkaConsumer, - rebalanceListener, - captureOffsetAndExecuteTestHandler); - - endlessConsumer.start(); - } - - @AfterEach - public void deinit() - { - try - { - endlessConsumer.stop(); - } - catch (Exception e) - { - log.info("Exception while stopping the consumer: {}", e.toString()); - } - } - - - @TestConfiguration - @Import(ApplicationConfiguration.class) - public static class Configuration - { - @Bean - Serializer serializer() - { - return new LongSerializer(); - } - - @Bean - KafkaProducer kafkaProducer(ApplicationProperties properties) - { - Properties props = new Properties(); - props.put("bootstrap.servers", properties.getBootstrapServer()); - props.put("linger.ms", 100); - props.put("key.serializer", StringSerializer.class.getName()); - props.put("value.serializer", BytesSerializer.class.getName()); - - return new KafkaProducer<>(props); - } - - @Bean - KafkaConsumer offsetConsumer(ApplicationProperties properties) - { - Properties props = new Properties(); - props.put("bootstrap.servers", properties.getBootstrapServer()); - props.put("client.id", "OFFSET-CONSUMER"); - props.put("enable.auto.commit", false); - props.put("auto.offset.reset", "latest"); - props.put("key.deserializer", BytesDeserializer.class.getName()); - props.put("value.deserializer", BytesDeserializer.class.getName()); - - return new KafkaConsumer<>(props); - } - } + public ApplicationTests() + { + super( + new RecordGenerator() + { + final StringSerializer stringSerializer = new StringSerializer(); + final LongSerializer longSerializer = new LongSerializer(); + + + @Override + public int generate( + boolean poisonPills, + boolean logicErrors, + Consumer> messageSender) + { + int i = 0; + + for (int partition = 0; partition < 10; partition++) + { + for (int key = 0; key < 10; key++) + { + i++; + + Bytes value = new Bytes(longSerializer.serialize(TOPIC, (long)i)); + if (i == 77) + { + if (logicErrors) + { + value = new Bytes(longSerializer.serialize(TOPIC, Long.MIN_VALUE)); + } + if (poisonPills) + { + value = new Bytes(stringSerializer.serialize(TOPIC, "BOOM (Poison-Pill)!")); + } + } + + ProducerRecord record = + new ProducerRecord<>( + TOPIC, + partition, + new Bytes(stringSerializer.serialize(TOPIC,Integer.toString(partition*10+key%2))), + value); + + messageSender.accept(record); + } + } + + return i; + } + }); + } + + + @TestConfiguration + public static class Configuration + { + @Primary + @Bean + public ApplicationRecordHandler recordHandler() + { + ApplicationRecordHandler recordHandler = new ApplicationRecordHandler(); + return new ApplicationRecordHandler() + { + @Override + public void accept(ConsumerRecord record) + { + if (record.value() == Long.MIN_VALUE) + throw new RuntimeException("BOOM (Logic-Error)!"); + super.accept(record); + } + }; + } + } } diff --git a/src/test/java/de/juplo/kafka/ErrorCannotBeGeneratedCondition.java b/src/test/java/de/juplo/kafka/ErrorCannotBeGeneratedCondition.java new file mode 100644 index 0000000..606218f --- /dev/null +++ b/src/test/java/de/juplo/kafka/ErrorCannotBeGeneratedCondition.java @@ -0,0 +1,60 @@ +package de.juplo.kafka; + +import org.junit.jupiter.api.extension.ConditionEvaluationResult; +import org.junit.jupiter.api.extension.ExecutionCondition; +import org.junit.jupiter.api.extension.ExtensionContext; +import org.junit.platform.commons.util.AnnotationUtils; + +import java.util.LinkedList; +import java.util.List; +import java.util.Optional; +import java.util.stream.Collectors; + + +public class ErrorCannotBeGeneratedCondition implements ExecutionCondition +{ + @Override + public ConditionEvaluationResult evaluateExecutionCondition(ExtensionContext context) + { + final Optional optional = + AnnotationUtils.findAnnotation( + context.getElement(), + SkipWhenErrorCannotBeGenerated.class); + + if (context.getTestInstance().isEmpty()) + return ConditionEvaluationResult.enabled("Test-instance ist not available"); + + if (optional.isPresent()) + { + SkipWhenErrorCannotBeGenerated skipWhenErrorCannotBeGenerated = optional.get(); + GenericApplicationTests instance = (GenericApplicationTests)context.getTestInstance().get(); + List missingRequiredErrors = new LinkedList<>(); + + if (skipWhenErrorCannotBeGenerated.poisonPill() && !instance.recordGenerator.canGeneratePoisonPill()) + missingRequiredErrors.add("Poison-Pill"); + + if (skipWhenErrorCannotBeGenerated.logicError() && !instance.recordGenerator.canGenerateLogicError()) + missingRequiredErrors.add("Logic-Error"); + + StringBuilder builder = new StringBuilder(); + builder.append(context.getTestClass().get().getSimpleName()); + + if (missingRequiredErrors.isEmpty()) + { + builder.append(" can generate all required types of errors"); + return ConditionEvaluationResult.enabled(builder.toString()); + } + + builder.append(" cannot generate the required error(s): "); + builder.append( + missingRequiredErrors + .stream() + .collect(Collectors.joining(", "))); + + return ConditionEvaluationResult.disabled(builder.toString()); + } + + return ConditionEvaluationResult.enabled( + "Not annotated with " + SkipWhenErrorCannotBeGenerated.class.getSimpleName()); + } +} diff --git a/src/test/java/de/juplo/kafka/GenericApplicationTests.java b/src/test/java/de/juplo/kafka/GenericApplicationTests.java new file mode 100644 index 0000000..fa3d911 --- /dev/null +++ b/src/test/java/de/juplo/kafka/GenericApplicationTests.java @@ -0,0 +1,390 @@ +package de.juplo.kafka; + +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.EnableAutoConfiguration; +import org.springframework.boot.test.autoconfigure.data.mongo.AutoConfigureDataMongo; +import org.springframework.boot.test.context.ConfigDataApplicationContextInitializer; +import org.springframework.boot.test.context.TestConfiguration; +import org.springframework.context.annotation.Import; +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.util.*; +import java.util.concurrent.ExecutorService; +import java.util.function.BiConsumer; +import java.util.function.Consumer; +import java.util.stream.Collectors; +import java.util.stream.IntStream; + +import static de.juplo.kafka.GenericApplicationTests.PARTITIONS; +import static de.juplo.kafka.GenericApplicationTests.TOPIC; +import static org.assertj.core.api.Assertions.*; +import static org.awaitility.Awaitility.*; + + +@SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class) +@TestPropertySource( + properties = { + "consumer.bootstrap-server=${spring.embedded.kafka.brokers}", + "consumer.topic=" + TOPIC, + "consumer.commit-interval=1s", + "spring.mongodb.embedded.version=4.4.13" }) +@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS) +@EnableAutoConfiguration +@AutoConfigureDataMongo +@Slf4j +abstract class GenericApplicationTests +{ + public static final String TOPIC = "FOO"; + public static final int PARTITIONS = 10; + + + @Autowired + KafkaConsumer kafkaConsumer; + @Autowired + Consumer> consumer; + @Autowired + ApplicationProperties properties; + @Autowired + ExecutorService executor; + @Autowired + StateRepository stateRepository; + @Autowired + PollIntervalAwareConsumerRebalanceListener rebalanceListener; + @Autowired + RecordHandler recordHandler; + + KafkaProducer testRecordProducer; + KafkaConsumer offsetConsumer; + EndlessConsumer endlessConsumer; + Map oldOffsets; + Map newOffsets; + Set> receivedRecords; + + + final RecordGenerator recordGenerator; + final Consumer> messageSender; + + public GenericApplicationTests(RecordGenerator recordGenerator) + { + this.recordGenerator = recordGenerator; + this.messageSender = (record) -> sendMessage(record); + } + + + /** Tests methods */ + + @Test + void commitsCurrentOffsetsOnSuccess() + { + int numberOfGeneratedMessages = + recordGenerator.generate(false, false, messageSender); + + await(numberOfGeneratedMessages + " records received") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> receivedRecords.size() >= numberOfGeneratedMessages); + + 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"); + + recordGenerator.assertBusinessLogic(); + } + + @Test + @SkipWhenErrorCannotBeGenerated(poisonPill = true) + void commitsOffsetOfErrorForReprocessingOnDeserializationError() + { + int numberOfGeneratedMessages = + recordGenerator.generate(true, false, messageSender); + + 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(numberOfGeneratedMessages); + + assertThatNoException() + .describedAs("Consumer should not be running") + .isThrownBy(() -> endlessConsumer.exitStatus()); + assertThat(endlessConsumer.exitStatus()) + .describedAs("Consumer should have exited abnormally") + .containsInstanceOf(RecordDeserializationException.class); + + recordGenerator.assertBusinessLogic(); + } + + @Test + @SkipWhenErrorCannotBeGenerated(logicError = true) + void doesNotCommitOffsetsOnLogicError() + { + int numberOfGeneratedMessages = + recordGenerator.generate(false, true, messageSender); + + await("Consumer failed") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> !endlessConsumer.running()); + + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(oldOffsets); + + endlessConsumer.start(); + await("Consumer failed") + .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) + .until(() -> !endlessConsumer.running()); + + checkSeenOffsetsForProgress(); + compareToCommitedOffsets(oldOffsets); + assertThat(receivedRecords.size()) + .describedAs("Received not all sent events") + .isLessThan(numberOfGeneratedMessages); + + assertThatNoException() + .describedAs("Consumer should not be running") + .isThrownBy(() -> endlessConsumer.exitStatus()); + assertThat(endlessConsumer.exitStatus()) + .describedAs("Consumer should have exited abnormally") + .containsInstanceOf(RuntimeException.class); + + recordGenerator.assertBusinessLogic(); + } + + + /** Helper methods for the verification of expectations */ + + void compareToCommitedOffsets(Map offsetsToCheck) + { + doForCurrentOffsets((tp, offset) -> + { + Long expected = offsetsToCheck.get(tp) + 1; + log.debug("Checking, if the offset for {} is {}", tp, expected); + assertThat(offset) + .describedAs("Committed offset corresponds to the offset of the consumer") + .isEqualTo(expected); + }); + } + + void checkSeenOffsetsForProgress() + { + // Be sure, that some messages were consumed...! + Set withProgress = new HashSet<>(); + partitions().forEach(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) + .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()); + partitions().forEach(tp -> + { + Long offset = offsetConsumer.position(tp); + log.info("New position for {}: {}", tp, offset); + Integer partition = tp.partition(); + StateDocument document = + stateRepository + .findById(partition.toString()) + .orElse(new StateDocument(partition)); + document.offset = offset; + stateRepository.save(document); + }); + offsetConsumer.unsubscribe(); + } + + void doForCurrentOffsets(BiConsumer consumer) + { + partitions().forEach(tp -> + { + String partition = Integer.toString(tp.partition()); + Optional offset = stateRepository.findById(partition).map(document -> document.offset); + consumer.accept(tp, offset.orElse(0l)); + }); + } + + List partitions() + { + return + IntStream + .range(0, PARTITIONS) + .mapToObj(partition -> new TopicPartition(TOPIC, partition)) + .collect(Collectors.toList()); + } + + + public interface RecordGenerator + { + int generate( + boolean poisonPills, + boolean logicErrors, + Consumer> messageSender); + + default boolean canGeneratePoisonPill() + { + return true; + } + + default boolean canGenerateLogicError() + { + return true; + } + + default void assertBusinessLogic() + { + log.debug("No business-logic to assert"); + } + } + + void sendMessage(ProducerRecord record) + { + testRecordProducer.send(record, (metadata, e) -> + { + if (metadata != null) + { + log.debug( + "{}|{} - {}={}", + metadata.partition(), + metadata.offset(), + record.key(), + record.value()); + } + else + { + log.warn( + "Exception for {}={}: {}", + record.key(), + record.value(), + e.toString()); + } + }); + } + + + @BeforeEach + public void init() + { + Properties props; + props = new Properties(); + props.put("bootstrap.servers", properties.getBootstrapServer()); + props.put("linger.ms", 100); + props.put("key.serializer", BytesSerializer.class.getName()); + props.put("value.serializer", BytesSerializer.class.getName()); + testRecordProducer = new KafkaProducer<>(props); + + props = new Properties(); + props.put("bootstrap.servers", properties.getBootstrapServer()); + props.put("client.id", "OFFSET-CONSUMER"); + props.put("group.id", properties.getGroupId()); + props.put("key.deserializer", BytesDeserializer.class.getName()); + props.put("value.deserializer", BytesDeserializer.class.getName()); + offsetConsumer = new KafkaConsumer<>(props); + + seekToEnd(); + + oldOffsets = new HashMap<>(); + newOffsets = new HashMap<>(); + receivedRecords = new HashSet<>(); + + doForCurrentOffsets((tp, offset) -> + { + oldOffsets.put(tp, offset - 1); + newOffsets.put(tp, offset - 1); + }); + + TestRecordHandler captureOffsetAndExecuteTestHandler = + new TestRecordHandler(recordHandler) + { + @Override + public void onNewRecord(ConsumerRecord record) + { + newOffsets.put( + new TopicPartition(record.topic(), record.partition()), + record.offset()); + receivedRecords.add(record); + } + }; + + endlessConsumer = + new EndlessConsumer<>( + executor, + properties.getClientId(), + properties.getTopic(), + kafkaConsumer, + rebalanceListener, + captureOffsetAndExecuteTestHandler); + + endlessConsumer.start(); + } + + @AfterEach + public void deinit() + { + try + { + endlessConsumer.stop(); + testRecordProducer.close(); + offsetConsumer.close(); + } + catch (Exception e) + { + log.info("Exception while stopping the consumer: {}", e.toString()); + } + } + + + @TestConfiguration + @Import(ApplicationConfiguration.class) + public static class Configuration + { + } +} diff --git a/src/test/java/de/juplo/kafka/SkipWhenErrorCannotBeGenerated.java b/src/test/java/de/juplo/kafka/SkipWhenErrorCannotBeGenerated.java new file mode 100644 index 0000000..6d15e9e --- /dev/null +++ b/src/test/java/de/juplo/kafka/SkipWhenErrorCannotBeGenerated.java @@ -0,0 +1,15 @@ +package de.juplo.kafka; + +import org.junit.jupiter.api.extension.ExtendWith; + +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; + + +@Retention(RetentionPolicy.RUNTIME) +@ExtendWith(ErrorCannotBeGeneratedCondition.class) +public @interface SkipWhenErrorCannotBeGenerated +{ + boolean poisonPill() default false; + boolean logicError() default false; +}