@TestPropertySource(
properties = {
"consumer.bootstrap-server=${spring.embedded.kafka.brokers}",
- "consumer.topic=" + TOPIC })
+ "consumer.topic=" + TOPIC,
+ "consumer.commit-interval=1s" })
@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
@Slf4j
class ApplicationTests
/** 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((partition, key, counter) ->
{
type = "message";
}
else {
- value = serializeGreeting(key, counter);
+ value = serializeGreeting(key);
type = "greeting";
}
- return toRecord(partition, key, value, type);
+ return toRecord(partition, key, value, Optional.of(type));
});
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();
}
@Test
- @Order(2)
- void commitsOffsetOfErrorForReprocessingOnError()
+ void commitsOffsetOfErrorForReprocessingOnDeserializationErrorInvalidMessage()
+ {
+ send100Messages((partition, key, counter) ->
+ {
+ Bytes value;
+ String type;
+
+ if (counter == 77)
+ {
+ value = serializeFooMessage(key, counter);
+ type = null;
+ }
+ else
+ {
+ if (counter%3 != 0)
+ {
+ value = serializeClientMessage(key, counter);
+ type = "message";
+ }
+ else {
+ value = serializeGreeting(key);
+ type = "greeting";
+ }
+ }
+
+ return toRecord(partition, key, value, Optional.ofNullable(type));
+ });
+
+ 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);
+ }
+
+ @Test
+ void commitsOffsetOfErrorForReprocessingOnDeserializationErrorOnUnknownMessage()
{
send100Messages((partition, key, counter) ->
{
type = "message";
}
else {
- value = serializeGreeting(key, counter);
+ value = serializeGreeting(key);
type = "greeting";
}
}
- return toRecord(partition, key, value, type);
+ return toRecord(partition, key, value, Optional.of(type));
});
await("Consumer failed")
.atMost(Duration.ofSeconds(30))
+ .pollInterval(Duration.ofSeconds(1))
.until(() -> !endlessConsumer.running());
checkSeenOffsetsForProgress();
endlessConsumer.start();
await("Consumer failed")
.atMost(Duration.ofSeconds(30))
+ .pollInterval(Duration.ofSeconds(1))
.until(() -> !endlessConsumer.running());
checkSeenOffsetsForProgress();
Set<TopicPartition> withProgress = new HashSet<>();
partitions().forEach(tp ->
{
- Long oldOffset = oldOffsets.get(tp);
- Long newOffset = newOffsets.get(tp);
+ Long oldOffset = oldOffsets.get(tp) + 1;
+ Long newOffset = newOffsets.get(tp) + 1;
if (!oldOffset.equals(newOffset))
{
log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset);
/** 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());
public interface RecordGenerator<K, V>
{
- public ProducerRecord<String, Bytes> generate(int partition, String key, long counter);
+ public ProducerRecord<String, Bytes> generate(int partition, String key, int counter);
}
void send100Messages(RecordGenerator recordGenerator)
{
- long i = 0;
+ int i = 0;
for (int partition = 0; partition < 10; partition++)
{
}
}
- ProducerRecord<String, Bytes> toRecord(int partition, String key, Bytes value, String type)
- {
+ ProducerRecord<String, Bytes> toRecord(int partition, String key, Bytes value, Optional<String> type)
+ {
ProducerRecord<String, Bytes> record =
new ProducerRecord<>(TOPIC, partition, key, value);
- record.headers().add("__TypeId__", type.getBytes());
+
+ type.ifPresent(typeId -> record.headers().add("__TypeId__", typeId.getBytes()));
return record;
}
- Bytes serializeClientMessage(String key, Long value)
+ Bytes serializeClientMessage(String key, int value)
{
- TestClientMessage message = new TestClientMessage(key, value.toString());
+ TestClientMessage message = new TestClientMessage(key, Integer.toString(value));
return new Bytes(valueSerializer.serialize(TOPIC, message));
}
- Bytes serializeGreeting(String key, Long value)
+ Bytes serializeGreeting(String key)
{
TestGreeting message = new TestGreeting(key, LocalDateTime.now());
return new Bytes(valueSerializer.serialize(TOPIC, message));
}
- Bytes serializeFooMessage(String key, Long value)
+ Bytes serializeFooMessage(String key, int value)
{
- TestFooMessage message = new TestFooMessage(key, value);
+ TestFooMessage message = new TestFooMessage(key, (long)value);
return new Bytes(valueSerializer.serialize(TOPIC, message));
}
{
testHandler = record -> {} ;
+ seekToEnd();
+
oldOffsets = new HashMap<>();
newOffsets = new HashMap<>();
receivedRecords = new HashSet<>();
projects / demos / kafka / training / blobdiff