X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Ftest%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationTests.java;h=d7eb0398453a0229e15abacbc6d3c0903be842bd;hb=refs%2Fheads%2Frebalance-listener;hp=35d13cdda9ecb9749edbaeb6be8fc905fbe30c45;hpb=9d3fa83eb656617162d54a14e1bfcb330fa4ee3a;p=demos%2Fkafka%2Ftraining diff --git a/src/test/java/de/juplo/kafka/ApplicationTests.java b/src/test/java/de/juplo/kafka/ApplicationTests.java index 35d13cd..d7eb039 100644 --- a/src/test/java/de/juplo/kafka/ApplicationTests.java +++ b/src/test/java/de/juplo/kafka/ApplicationTests.java @@ -7,13 +7,11 @@ 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.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.context.ConfigDataApplicationContextInitializer; import org.springframework.boot.test.context.TestConfiguration; import org.springframework.context.annotation.Bean; @@ -27,17 +25,13 @@ import java.util.*; import java.util.concurrent.ExecutionException; import java.util.concurrent.ExecutorService; import java.util.function.BiConsumer; -import java.util.function.Consumer; -import java.util.function.Function; import java.util.stream.Collectors; import java.util.stream.IntStream; 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.*; -import static org.junit.jupiter.api.Assertions.assertDoesNotThrow; -import static org.junit.jupiter.api.Assertions.assertThrows; @SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class) @@ -45,8 +39,10 @@ import static org.junit.jupiter.api.Assertions.assertThrows; @TestPropertySource( properties = { "consumer.bootstrap-server=${spring.embedded.kafka.brokers}", - "consumer.topic=" + TOPIC }) + "consumer.topic=" + TOPIC, + "consumer.commit-interval=1s" }) @EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS) +@EnableAutoConfiguration @Slf4j class ApplicationTests { @@ -55,8 +51,9 @@ class ApplicationTests StringSerializer stringSerializer = new StringSerializer(); - LongSerializer longSerializer = new LongSerializer(); + @Autowired + Serializer valueSerializer; @Autowired KafkaProducer kafkaProducer; @Autowired @@ -67,8 +64,11 @@ class ApplicationTests ApplicationProperties properties; @Autowired ExecutorService executor; + @Autowired + ApplicationRebalanceListener rebalanceListener; + @Autowired + ApplicationRecordHandler recordHandler; - Consumer> testHandler; EndlessConsumer endlessConsumer; Map oldOffsets; Map newOffsets; @@ -78,40 +78,47 @@ class ApplicationTests /** 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))); + 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); }); - assertThrows( - IllegalStateException.class, - () -> endlessConsumer.exitStatus(), - "Consumer should still be running"); + assertThatExceptionOfType(IllegalStateException.class) + .isThrownBy(() -> endlessConsumer.exitStatus()) + .describedAs("Consumer should still be running"); } @Test - @Order(2) - void commitsOffsetOfErrorForReprocessingOnError() + void commitsOffsetOfErrorForReprocessingOnDeserializationError() { - send100Messages(counter -> - counter == 77 - ? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!")) - : new Bytes(longSerializer.serialize(TOPIC, counter))); + 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(); @@ -120,6 +127,7 @@ class ApplicationTests endlessConsumer.start(); await("Consumer failed") .atMost(Duration.ofSeconds(30)) + .pollInterval(Duration.ofSeconds(1)) .until(() -> !endlessConsumer.running()); checkSeenOffsetsForProgress(); @@ -128,9 +136,9 @@ class ApplicationTests .describedAs("Received not all sent events") .isLessThan(100); - assertDoesNotThrow( - () -> endlessConsumer.exitStatus(), - "Consumer should not be running"); + assertThatNoException() + .describedAs("Consumer should not be running") + .isThrownBy(() -> endlessConsumer.exitStatus()); assertThat(endlessConsumer.exitStatus()) .describedAs("Consumer should have exited abnormally") .containsInstanceOf(RecordDeserializationException.class); @@ -157,8 +165,8 @@ class ApplicationTests Set 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); @@ -173,6 +181,21 @@ class ApplicationTests /** 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 consumer) { offsetConsumer.assign(partitions()); @@ -190,7 +213,12 @@ class ApplicationTests } - void send100Messages(Function messageGenerator) + public interface RecordGenerator + { + public ProducerRecord generate(int partition, String key, long counter); + } + + void send100Messages(RecordGenerator recordGenerator) { long i = 0; @@ -198,14 +226,8 @@ class ApplicationTests { for (int key = 0; key < 10; key++) { - Bytes value = messageGenerator.apply(++i); - ProducerRecord record = - new ProducerRecord<>( - TOPIC, - partition, - Integer.toString(key%2), - value); + recordGenerator.generate(partition, Integer.toString(partition*10+key%2), ++i); kafkaProducer.send(record, (metadata, e) -> { @@ -235,7 +257,7 @@ class ApplicationTests @BeforeEach public void init() { - testHandler = record -> {} ; + seekToEnd(); oldOffsets = new HashMap<>(); newOffsets = new HashMap<>(); @@ -247,14 +269,16 @@ class ApplicationTests newOffsets.put(tp, offset - 1); }); - Consumer> captureOffsetAndExecuteTestHandler = - record -> - { - newOffsets.put( - new TopicPartition(record.topic(), record.partition()), - record.offset()); - receivedRecords.add(record); - testHandler.accept(record); + 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 = @@ -263,6 +287,7 @@ class ApplicationTests properties.getClientId(), properties.getTopic(), kafkaConsumer, + rebalanceListener, captureOffsetAndExecuteTestHandler); endlessConsumer.start(); @@ -286,6 +311,12 @@ class ApplicationTests @Import(ApplicationConfiguration.class) public static class Configuration { + @Bean + Serializer serializer() + { + return new LongSerializer(); + } + @Bean KafkaProducer kafkaProducer(ApplicationProperties properties) {