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.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.Bean;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+import java.time.Clock;
import java.time.Duration;
import java.util.*;
import java.util.concurrent.ExecutionException;
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.*;
@TestPropertySource(
properties = {
"consumer.bootstrap-server=${spring.embedded.kafka.brokers}",
- "consumer.topic=" + TOPIC })
+ "consumer.topic=" + TOPIC,
+ "consumer.commit-interval=1s",
+ "spring.mongodb.embedded.version=4.4.13" })
@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
+@EnableAutoConfiguration
+@AutoConfigureDataMongo
@Slf4j
class ApplicationTests
{
StringSerializer stringSerializer = new StringSerializer();
- LongSerializer longSerializer = new LongSerializer();
+ @Autowired
+ Serializer valueSerializer;
@Autowired
KafkaProducer<String, Bytes> kafkaProducer;
@Autowired
- KafkaConsumer<String, Long> kafkaConsumer;
+ KafkaConsumer<String, String> kafkaConsumer;
@Autowired
- KafkaConsumer<Bytes, Bytes> offsetConsumer;
+ PartitionStatisticsRepository partitionStatisticsRepository;
@Autowired
ApplicationProperties properties;
@Autowired
ExecutorService executor;
+ @Autowired
+ PartitionStatisticsRepository repository;
- Consumer<ConsumerRecord<String, Long>> testHandler;
- EndlessConsumer<String, Long> endlessConsumer;
+ Consumer<ConsumerRecord<String, String>> testHandler;
+ EndlessConsumer endlessConsumer;
Map<TopicPartition, Long> oldOffsets;
Map<TopicPartition, Long> newOffsets;
+ Set<ConsumerRecord<String, String>> receivedRecords;
/** Tests methods */
@Test
- @Order(1) // << The poistion pill is not skipped. Hence, this test must run first
void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException
{
- send100Messages(i -> new Bytes(longSerializer.serialize(TOPIC, i)));
-
- Set<ConsumerRecord<String, Long>> received = new HashSet<>();
- testHandler = record -> received.add(record);
+ send100Messages(i -> new Bytes(valueSerializer.serialize(TOPIC, i)));
await("100 records received")
.atMost(Duration.ofSeconds(30))
- .until(() -> received.size() >= 100);
+ .until(() -> receivedRecords.size() >= 100);
await("Offsets committed")
.atMost(Duration.ofSeconds(10))
checkSeenOffsetsForProgress();
compareToCommitedOffsets(newOffsets);
});
- }
-
- @Test
- @Order(2)
- void commitsOffsetOfErrorForReprocessingOnError()
- {
- send100Messages(counter ->
- counter == 77
- ? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!"))
- : new Bytes(longSerializer.serialize(TOPIC, counter)));
- await("Consumer failed")
- .atMost(Duration.ofSeconds(30))
- .until(() -> !endlessConsumer.running());
-
- checkSeenOffsetsForProgress();
- compareToCommitedOffsets(newOffsets);
-
- endlessConsumer.start();
- await("Consumer failed")
- .atMost(Duration.ofSeconds(30))
- .until(() -> !endlessConsumer.running());
-
- checkSeenOffsetsForProgress();
- compareToCommitedOffsets(newOffsets);
+ assertThatExceptionOfType(IllegalStateException.class)
+ .isThrownBy(() -> endlessConsumer.exitStatus())
+ .describedAs("Consumer should still be running");
}
{
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);
});
}
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();
}
void doForCurrentOffsets(BiConsumer<TopicPartition, Long> consumer)
{
- offsetConsumer.assign(partitions());
- partitions().forEach(tp -> consumer.accept(tp, offsetConsumer.position(tp)));
- offsetConsumer.unsubscribe();
+ partitions().forEach(tp ->
+ {
+ String partition = Integer.toString(tp.partition());
+ Optional<Long> offset = partitionStatisticsRepository.findById(partition).map(document -> document.offset);
+ consumer.accept(tp, offset.orElse(0l));
+ });
}
List<TopicPartition> partitions()
oldOffsets = new HashMap<>();
newOffsets = new HashMap<>();
+ receivedRecords = new HashSet<>();
doForCurrentOffsets((tp, offset) ->
{
newOffsets.put(tp, offset - 1);
});
- Consumer<ConsumerRecord<String, Long>> captureOffsetAndExecuteTestHandler =
+ Consumer<ConsumerRecord<String, String>> captureOffsetAndExecuteTestHandler =
record ->
{
newOffsets.put(
new TopicPartition(record.topic(), record.partition()),
record.offset());
+ receivedRecords.add(record);
testHandler.accept(record);
};
endlessConsumer =
- new EndlessConsumer<>(
+ new EndlessConsumer(
executor,
+ repository,
properties.getClientId(),
properties.getTopic(),
- kafkaConsumer,
- captureOffsetAndExecuteTestHandler);
+ Clock.systemDefaultZone(),
+ properties.getCommitInterval(),
+ kafkaConsumer);
endlessConsumer.start();
}
@Import(ApplicationConfiguration.class)
public static class Configuration
{
+ @Bean
+ Serializer<Long> serializer()
+ {
+ return new LongSerializer();
+ }
+
@Bean
KafkaProducer<String, Bytes> kafkaProducer(ApplicationProperties properties)
{
return new KafkaProducer<>(props);
}
-
- @Bean
- KafkaConsumer<Bytes, Bytes> offsetConsumer(ApplicationProperties properties)
- {
- Properties 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());
-
- return new KafkaConsumer<>(props);
- }
}
}
projects / demos / kafka / training / blobdiff