package de.juplo.kafka;
+import com.mongodb.client.MongoClient;
import lombok.extern.slf4j.Slf4j;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.KafkaConsumer;
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;
@SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class)
@TestPropertySource(
properties = {
- "consumer.bootstrap-server=${spring.embedded.kafka.brokers}",
- "consumer.topic=" + TOPIC,
- "consumer.commit-interval=1s" })
+ "sumup.adder.bootstrap-server=${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>
{
ApplicationProperties properties;
@Autowired
ExecutorService executor;
+ @Autowired
+ MongoClient mongoClient;
+ @Autowired
+ MongoProperties mongoProperties;
+ @Autowired
+ RebalanceListener 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> newOffsets;
+ Map<TopicPartition, Long> seenOffsets;
Set<ConsumerRecord<K, V>> receivedRecords;
/** Tests methods */
@Test
- void commitsCurrentOffsetsOnSuccess()
+ void commitsCurrentOffsetsOnSuccess() throws Exception
{
int numberOfGeneratedMessages =
recordGenerator.generate(false, false, messageSender);
.untilAsserted(() ->
{
checkSeenOffsetsForProgress();
- compareToCommitedOffsets(newOffsets);
+ assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
});
assertThatExceptionOfType(IllegalStateException.class)
.isThrownBy(() -> endlessConsumer.exitStatus())
.describedAs("Consumer should still be running");
+
+ endlessConsumer.stop();
+ recordGenerator.assertBusinessLogic();
}
@Test
.until(() -> !endlessConsumer.running());
checkSeenOffsetsForProgress();
- compareToCommitedOffsets(newOffsets);
+ assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
endlessConsumer.start();
await("Consumer failed")
.until(() -> !endlessConsumer.running());
checkSeenOffsetsForProgress();
- compareToCommitedOffsets(newOffsets);
+ assertSeenOffsetsEqualCommittedOffsets(seenOffsets);
assertThat(receivedRecords.size())
.describedAs("Received not all sent events")
.isLessThan(numberOfGeneratedMessages);
assertThat(endlessConsumer.exitStatus())
.describedAs("Consumer should have exited abnormally")
.containsInstanceOf(RecordDeserializationException.class);
+
+ recordGenerator.assertBusinessLogic();
}
@Test
.until(() -> !endlessConsumer.running());
checkSeenOffsetsForProgress();
- compareToCommitedOffsets(oldOffsets);
+ assertSeenOffsetsAreBehindCommittedOffsets(seenOffsets);
endlessConsumer.start();
await("Consumer failed")
.pollInterval(Duration.ofSeconds(1))
.until(() -> !endlessConsumer.running());
- checkSeenOffsetsForProgress();
- compareToCommitedOffsets(oldOffsets);
- assertThat(receivedRecords.size())
- .describedAs("Received not all sent events")
- .isLessThan(numberOfGeneratedMessages);
+ assertSeenOffsetsAreBehindCommittedOffsets(seenOffsets);
assertThatNoException()
.describedAs("Consumer should not be running")
assertThat(endlessConsumer.exitStatus())
.describedAs("Consumer should have exited abnormally")
.containsInstanceOf(RuntimeException.class);
+
+ recordGenerator.assertBusinessLogic();
}
/** Helper methods for the verification of expectations */
- void compareToCommitedOffsets(Map<TopicPartition, Long> offsetsToCheck)
+ void assertSeenOffsetsEqualCommittedOffsets(Map<TopicPartition, Long> offsetsToCheck)
{
doForCurrentOffsets((tp, offset) ->
{
Long expected = offsetsToCheck.get(tp) + 1;
- log.debug("Checking, if the offset for {} is {}", tp, expected);
+ 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...!
partitions().forEach(tp ->
{
Long oldOffset = oldOffsets.get(tp) + 1;
- Long newOffset = newOffsets.get(tp) + 1;
+ Long newOffset = seenOffsets.get(tp) + 1;
if (!oldOffset.equals(newOffset))
{
log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset);
{
return true;
}
+
+ default void assertBusinessLogic()
+ {
+ log.debug("No business-logic to assert");
+ }
}
void sendMessage(ProducerRecord<Bytes, Bytes> record)
props.put("value.deserializer", BytesDeserializer.class.getName());
offsetConsumer = new KafkaConsumer<>(props);
+ mongoClient.getDatabase(mongoProperties.getDatabase()).drop();
seekToEnd();
oldOffsets = new HashMap<>();
- newOffsets = new HashMap<>();
+ seenOffsets = new HashMap<>();
receivedRecords = new HashSet<>();
doForCurrentOffsets((tp, offset) ->
{
oldOffsets.put(tp, offset - 1);
- newOffsets.put(tp, offset - 1);
+ seenOffsets.put(tp, offset - 1);
});
- Consumer<ConsumerRecord<K, V>> captureOffsetAndExecuteTestHandler =
- record ->
+ TestRecordHandler<K, V> captureOffsetAndExecuteTestHandler =
+ new TestRecordHandler<K, V>(recordHandler)
{
- newOffsets.put(
- new TopicPartition(record.topic(), record.partition()),
- record.offset());
- receivedRecords.add(record);
- consumer.accept(record);
+ @Override
+ public void onNewRecord(ConsumerRecord<K, V> record)
+ {
+ seenOffsets.put(
+ new TopicPartition(record.topic(), record.partition()),
+ record.offset());
+ receivedRecords.add(record);
+ }
};
endlessConsumer =
properties.getClientId(),
properties.getTopic(),
kafkaConsumer,
+ rebalanceListener,
captureOffsetAndExecuteTestHandler);
endlessConsumer.start();
{
try
{
- endlessConsumer.stop();
testRecordProducer.close();
offsetConsumer.close();
}
projects / demos / kafka / training / blobdiff