* Der Adder beendet sich bei einer Exception vollständig.
* _Hintergrund:_ Zustand ist in der Übung leichter erkennbar.
* Die Logik, ob beim Beenden ein Commit durchgeführt wurde, wurde so weit
wie möglich vereinfacht.
* Da der Test aus zeitmangel nicht angepasst werden konnte, wurde er
vorerst entfernt.
sumup.requests.client-id: requests-1
requests-2:
- image: juplo/sumup-requests-json:1.0-SNAPSHOT
+ image: juplo/sumup-requests-fehlerteufel:1.0-SNAPSHOT
ports:
- 8082:8080
environment:
server.port: 8080
sumup.requests.bootstrap-server: kafka:9092
sumup.requests.client-id: requests-2
+ sumup.requests.error-position: 6
adder-1:
image: juplo/sumup-adder-json:1.0-SNAPSHOT
sumup.adder.throttle: 3ms
spring.data.mongodb.uri: mongodb://juplo:training@mongo:27017
spring.data.mongodb.database: juplo
- logging.level.org.apache.kafka.clients.consumer: DEBUG
+ logging.level.org.apache.kafka.clients.consumer: INFO
adder-2:
image: juplo/sumup-adder-json:1.0-SNAPSHOT
sumup.adder.throttle: 3ms
spring.data.mongodb.uri: mongodb://juplo:training@mongo:27017
spring.data.mongodb.database: juplo
- logging.level.org.apache.kafka.clients.consumer: DEBUG
+ logging.level.org.apache.kafka.clients.consumer: INFO
peter:
image: juplo/toolbox
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.kafka.support.serializer.JsonDeserializer;
public EndlessConsumer<String, Message> endlessConsumer(
KafkaConsumer<String, Message> kafkaConsumer,
ExecutorService executor,
+ ConfigurableApplicationContext applicationContext,
ApplicationRebalanceListener rebalanceListener,
ApplicationRecordHandler recordHandler,
ApplicationProperties properties)
return
new EndlessConsumer<>(
executor,
+ applicationContext,
properties.getClientId(),
properties.getTopic(),
kafkaConsumer,
import java.util.List;
import java.util.Map;
import java.util.Optional;
-import java.util.concurrent.ExecutionException;
import java.util.stream.Collectors;
@RequiredArgsConstructor
public class DriverController
{
- private final EndlessConsumer consumer;
private final ApplicationRecordHandler recordHandler;
private final AdderResults results;
- @PostMapping("start")
- public void start()
- {
- consumer.start();
- }
-
- @PostMapping("stop")
- public void stop() throws ExecutionException, InterruptedException
- {
- consumer.stop();
- }
-
-
@GetMapping("state")
public Map<Integer, Map<String, AdderResult>> state()
{
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.RecordDeserializationException;
import org.apache.kafka.common.errors.WakeupException;
+import org.springframework.context.ConfigurableApplicationContext;
-import javax.annotation.PreDestroy;
import java.time.Duration;
import java.util.*;
-import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
-import java.util.concurrent.locks.Condition;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReentrantLock;
@Slf4j
public class EndlessConsumer<K, V> implements Runnable
{
private final ExecutorService executor;
+ private final ConfigurableApplicationContext applicationContext;
private final String id;
private final String topic;
private final Consumer<K, V> consumer;
private final ConsumerRebalanceListener rebalanceListener;
private final RecordHandler<K, V> recordHandler;
- private final Lock lock = new ReentrantLock();
- private final Condition condition = lock.newCondition();
private boolean running = false;
- private Exception exception;
+ private Exception exception = null;
private long consumed = 0;
catch(WakeupException e)
{
log.info("{} - RIIING! Request to stop consumption - commiting current offsets!", id);
- consumer.commitSync();
- shutdown();
}
catch(RecordDeserializationException e)
{
tp,
offset,
e.getCause().toString());
-
- consumer.commitSync();
- shutdown(e);
+ this.exception = e;
}
catch(Exception e)
{
log.error("{} - Unexpected error: {}", id, e.toString(), e);
- shutdown(e);
+ this.exception = e;
+ log.info("{} - Unsubscribing...", id);
+ consumer.unsubscribe();
}
finally
{
+ running = false;
+ log.info("{} - Closing the consumer...", id);
+ consumer.close();
+ log.info("{} - Shutting down the app...", id);
+ applicationContext.close();
log.info("{} - Consumer-Thread exiting", id);
}
}
- private void shutdown()
- {
- shutdown(null);
- }
-
- private void shutdown(Exception e)
- {
- lock.lock();
- try
- {
- try
- {
- log.info("{} - Unsubscribing from topic {}", id, topic);
- consumer.unsubscribe();
- }
- catch (Exception ue)
- {
- log.error(
- "{} - Error while unsubscribing from topic {}: {}",
- id,
- topic,
- ue.toString());
- }
- finally
- {
- running = false;
- exception = e;
- condition.signal();
- }
- }
- finally
- {
- lock.unlock();
- }
- }
-
public void start()
{
- lock.lock();
- try
- {
- if (running)
- throw new IllegalStateException("Consumer instance " + id + " is already running!");
-
- log.info("{} - Starting - consumed {} messages before", id, consumed);
- running = true;
- exception = null;
- executor.submit(this);
- }
- finally
- {
- lock.unlock();
- }
- }
-
- public synchronized void stop() throws InterruptedException
- {
- lock.lock();
- try
- {
- if (!running)
- throw new IllegalStateException("Consumer instance " + id + " is not running!");
+ if (running)
+ throw new IllegalStateException("Consumer instance " + id + " is already running!");
- log.info("{} - Stopping", id);
- consumer.wakeup();
- condition.await();
- log.info("{} - Stopped - consumed {} messages so far", id, consumed);
- }
- finally
- {
- lock.unlock();
- }
+ log.info("{} - Starting - consumed {} messages before", id, consumed);
+ running = true;
+ executor.submit(this);
}
- @PreDestroy
- public void destroy() throws ExecutionException, InterruptedException
+ public void stop()
{
- log.info("{} - Destroy!", id);
- log.info("{}: Consumed {} messages in total, exiting!", id, consumed);
+ consumer.wakeup();
}
-
public boolean running()
{
- lock.lock();
- try
- {
- return running;
- }
- finally
- {
- lock.unlock();
- }
+ return running;
}
public Optional<Exception> exitStatus()
{
- lock.lock();
- try
- {
- if (running)
- throw new IllegalStateException("No exit-status available: Consumer instance " + id + " is running!");
+ if (running)
+ throw new IllegalStateException("No exit-status available: Consumer instance " + id + " is running!");
- return Optional.ofNullable(exception);
- }
- finally
- {
- lock.unlock();
- }
+ return Optional.ofNullable(exception);
}
}
+++ /dev/null
-package de.juplo.kafka;
-
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.producer.ProducerRecord;
-import org.apache.kafka.common.serialization.StringSerializer;
-import org.apache.kafka.common.utils.Bytes;
-import org.springframework.beans.factory.annotation.Autowired;
-
-import java.util.*;
-import java.util.function.Consumer;
-import java.util.stream.Collectors;
-import java.util.stream.IntStream;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-
-@Slf4j
-public class ApplicationTests extends GenericApplicationTests<String, Message>
-{
- @Autowired
- StateRepository stateRepository;
-
-
- public ApplicationTests()
- {
- super(new ApplicationTestRecrodGenerator());
- ((ApplicationTestRecrodGenerator)recordGenerator).tests = this;
- }
-
-
- static class ApplicationTestRecrodGenerator implements RecordGenerator
- {
- ApplicationTests tests;
-
- final int[] numbers = {1, 77, 33, 2, 66, 666, 11};
- final String[] dieWilden13 =
- IntStream
- .range(1, 14)
- .mapToObj(i -> "seeräuber-" + i)
- .toArray(i -> new String[i]);
- final StringSerializer stringSerializer = new StringSerializer();
- final Bytes calculateMessage = new Bytes(stringSerializer.serialize(TOPIC, "{}"));
-
- int counter = 0;
-
- Map<String, List<AdderResult>> state;
-
- @Override
- public int generate(
- boolean poisonPills,
- boolean logicErrors,
- Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
- {
- counter = 0;
- state =
- Arrays
- .stream(dieWilden13)
- .collect(Collectors.toMap(
- seeräuber -> seeräuber,
- seeräuber -> new LinkedList()));
-
- int number[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
- int message[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
- int next = 0;
-
- for (int pass = 0; pass < 333; pass++)
- {
- for (int i = 0; i<13; i++)
- {
- String seeräuber = dieWilden13[i];
- Bytes key = new Bytes(stringSerializer.serialize(TOPIC, seeräuber));
-
- if (message[i] > number[i])
- {
- send(
- key,
- calculateMessage,
- Message.Type.CALC,
- poisonPill(poisonPills, pass, counter),
- logicError(logicErrors, pass, counter),
- messageSender);
- state.get(seeräuber).add(new AdderResult(number[i], (number[i] + 1) * number[i] / 2));
- // Pick next number to calculate
- number[i] = numbers[next++%numbers.length];
- message[i] = 1;
- log.debug("Seeräuber {} will die Summe für {} berechnen", seeräuber, number[i]);
- }
-
- send(
- key,
- new Bytes(stringSerializer.serialize(TOPIC, "{\"next\":" + message[i]++ + "}")),
- Message.Type.ADD,
- poisonPill(poisonPills, pass, counter),
- logicError(logicErrors, pass, counter),
- messageSender);
- }
- }
-
- return counter;
- }
-
- boolean poisonPill (boolean poisonPills, int pass, int counter)
- {
- return poisonPills && pass > 300 && counter%99 == 0;
- }
-
- boolean logicError(boolean logicErrors, int pass, int counter)
- {
- return logicErrors && pass > 300 && counter%77 == 0;
- }
-
- void send(
- Bytes key,
- Bytes value,
- Message.Type type,
- boolean poisonPill,
- boolean logicError,
- Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
- {
- counter++;
-
- if (logicError)
- {
- value = new Bytes(stringSerializer.serialize(TOPIC, "{\"next\":-1}"));
- }
- if (poisonPill)
- {
- value = new Bytes("BOOM!".getBytes());
- }
-
- ProducerRecord<Bytes, Bytes> record = new ProducerRecord<>(TOPIC, key, value);
- record.headers().add("__TypeId__", type.toString().getBytes());
- messageSender.accept(record);
- }
-
- @Override
- public void assertBusinessLogic()
- {
- for (int i=0; i<PARTITIONS; i++)
- {
- StateDocument stateDocument =
- tests.stateRepository.findById(Integer.toString(i)).get();
-
- stateDocument
- .results
- .entrySet()
- .stream()
- .forEach(entry ->
- {
- String user = entry.getKey();
- List<AdderResult> resultsForUser = entry.getValue();
-
- for (int j=0; j < resultsForUser.size(); j++)
- {
- if (!(j < state.get(user).size()))
- {
- break;
- }
-
- assertThat(resultsForUser.get(j))
- .as("Unexpected results calculation %d of user %s", j, user)
- .isEqualTo(state.get(user).get(j));
- }
-
- assertThat(state.get(user))
- .as("More results calculated for user %s as expected", user)
- .containsAll(resultsForUser);
- });
- }
- }
- }
-}
+++ /dev/null
-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<SkipWhenErrorCannotBeGenerated> 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<String> 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());
- }
-}
+++ /dev/null
-package de.juplo.kafka;
-
-import com.mongodb.client.MongoClient;
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
-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.autoconfigure.mongo.MongoProperties;
-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 = {
- "sumup.adder.bootstrap-server=${spring.embedded.kafka.brokers}",
- "sumup.adder.topic=" + TOPIC,
- "sumup.adder.commit-interval=500ms",
- "spring.mongodb.embedded.version=4.4.13" })
-@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
-@EnableAutoConfiguration
-@AutoConfigureDataMongo
-@Slf4j
-abstract class GenericApplicationTests<K, V>
-{
- public static final String TOPIC = "FOO";
- public static final int PARTITIONS = 10;
-
-
- @Autowired
- KafkaConsumer<K, V> kafkaConsumer;
- @Autowired
- Consumer<ConsumerRecord<K, V>> consumer;
- @Autowired
- ApplicationProperties properties;
- @Autowired
- ExecutorService executor;
- @Autowired
- MongoClient mongoClient;
- @Autowired
- MongoProperties mongoProperties;
- @Autowired
- ConsumerRebalanceListener rebalanceListener;
- @Autowired
- RecordHandler<K, V> recordHandler;
-
- KafkaProducer<Bytes, Bytes> testRecordProducer;
- KafkaConsumer<Bytes, Bytes> offsetConsumer;
- EndlessConsumer<K, V> endlessConsumer;
- Map<TopicPartition, Long> oldOffsets;
- Map<TopicPartition, Long> seenOffsets;
- Set<ConsumerRecord<K, V>> receivedRecords;
-
-
- final RecordGenerator recordGenerator;
- final Consumer<ProducerRecord<Bytes, Bytes>> messageSender;
-
- public GenericApplicationTests(RecordGenerator recordGenerator)
- {
- this.recordGenerator = recordGenerator;
- this.messageSender = (record) -> sendMessage(record);
- }
-
-
- /** Tests methods */
-
- @Test
- void commitsCurrentOffsetsOnSuccess() throws Exception
- {
- 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();
- assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
- });
-
- assertThatExceptionOfType(IllegalStateException.class)
- .isThrownBy(() -> endlessConsumer.exitStatus())
- .describedAs("Consumer should still be running");
-
- endlessConsumer.stop();
- 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();
- assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
-
- endlessConsumer.start();
- await("Consumer failed")
- .atMost(Duration.ofSeconds(30))
- .pollInterval(Duration.ofSeconds(1))
- .until(() -> !endlessConsumer.running());
-
- checkSeenOffsetsForProgress();
- assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
- 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();
- assertSeenOffsetsAreBehindCommittedOffsets(seenOffsets);
-
- endlessConsumer.start();
- await("Consumer failed")
- .atMost(Duration.ofSeconds(30))
- .pollInterval(Duration.ofSeconds(1))
- .until(() -> !endlessConsumer.running());
-
- assertSeenOffsetsAreBehindCommittedOffsets(seenOffsets);
-
- 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 assertSeenOffsetsEqualCommittedOffsets(Map<TopicPartition, Long> offsetsToCheck)
- {
- doForCurrentOffsets((tp, offset) ->
- {
- Long expected = offsetsToCheck.get(tp) + 1;
- log.debug("Checking, if the offset {} for {} is exactly {}", offset, tp, expected);
- assertThat(offset)
- .describedAs("Committed offset corresponds to the offset of the consumer")
- .isEqualTo(expected);
- });
- }
-
- void assertSeenOffsetsAreBehindCommittedOffsets(Map<TopicPartition, Long> offsetsToCheck)
- {
- List<Boolean> isOffsetBehindSeen = new LinkedList<>();
-
- doForCurrentOffsets((tp, offset) ->
- {
- Long expected = offsetsToCheck.get(tp) + 1;
- log.debug("Checking, if the offset {} for {} is at most {}", offset, tp, expected);
- assertThat(offset)
- .describedAs("Committed offset must be at most equal to the offset of the consumer")
- .isLessThanOrEqualTo(expected);
- isOffsetBehindSeen.add(offset < expected);
- });
-
- assertThat(isOffsetBehindSeen.stream().reduce(false, (result, next) -> result | next))
- .describedAs("Committed offsets are behind seen offsets")
- .isTrue();
- }
-
- void checkSeenOffsetsForProgress()
- {
- // Be sure, that some messages were consumed...!
- Set<TopicPartition> withProgress = new HashSet<>();
- partitions().forEach(tp ->
- {
- Long oldOffset = oldOffsets.get(tp) + 1;
- Long newOffset = seenOffsets.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());
- 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<TopicPartition, Long> consumer)
- {
- offsetConsumer.assign(partitions());
- partitions().forEach(tp -> consumer.accept(tp, offsetConsumer.position(tp)));
- offsetConsumer.unsubscribe();
- }
-
- List<TopicPartition> 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<ProducerRecord<Bytes, Bytes>> messageSender);
-
- default boolean canGeneratePoisonPill()
- {
- return true;
- }
-
- default boolean canGenerateLogicError()
- {
- return true;
- }
-
- default void assertBusinessLogic()
- {
- log.debug("No business-logic to assert");
- }
- }
-
- void sendMessage(ProducerRecord<Bytes, Bytes> 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);
-
- mongoClient.getDatabase(mongoProperties.getDatabase()).drop();
- seekToEnd();
-
- oldOffsets = new HashMap<>();
- seenOffsets = new HashMap<>();
- receivedRecords = new HashSet<>();
-
- doForCurrentOffsets((tp, offset) ->
- {
- oldOffsets.put(tp, offset - 1);
- seenOffsets.put(tp, offset - 1);
- });
-
- TestRecordHandler<K, V> captureOffsetAndExecuteTestHandler =
- new TestRecordHandler<K, V>(recordHandler)
- {
- @Override
- public void onNewRecord(ConsumerRecord<K, V> record)
- {
- seenOffsets.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
- {
- testRecordProducer.close();
- offsetConsumer.close();
- }
- catch (Exception e)
- {
- log.info("Exception while stopping the consumer: {}", e.toString());
- }
- }
-
-
- @TestConfiguration
- @Import(ApplicationConfiguration.class)
- public static class Configuration
- {
- }
-}
+++ /dev/null
-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;
-}
+++ /dev/null
-package de.juplo.kafka;
-
-import lombok.RequiredArgsConstructor;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
-
-
-@RequiredArgsConstructor
-public abstract class TestRecordHandler<K, V> implements RecordHandler<K, V>
-{
- private final RecordHandler<K, V> handler;
-
-
- public abstract void onNewRecord(ConsumerRecord<K, V> record);
-
-
- @Override
- public void accept(ConsumerRecord<K, V> record)
- {
- this.onNewRecord(record);
- handler.accept(record);
- }
-}
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