juplo.de Git - demos/kafka/training/blob - src/test/java/de/juplo/kafka/ApplicationTests.java

   1 package de.juplo.kafka;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.clients.consumer.ConsumerRecord;
   5 import org.apache.kafka.clients.consumer.KafkaConsumer;
   6 import org.apache.kafka.clients.producer.KafkaProducer;
   7 import org.apache.kafka.clients.producer.ProducerRecord;
   8 import org.apache.kafka.common.TopicPartition;
   9 import org.apache.kafka.common.serialization.*;
  10 import org.apache.kafka.common.utils.Bytes;
  11 import org.junit.jupiter.api.*;
  12 import org.springframework.beans.factory.annotation.Autowired;
  13 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  14 import org.springframework.boot.test.autoconfigure.data.mongo.AutoConfigureDataMongo;
  15 import org.springframework.boot.test.context.ConfigDataApplicationContextInitializer;
  16 import org.springframework.boot.test.context.TestConfiguration;
  17 import org.springframework.context.annotation.Bean;
  18 import org.springframework.context.annotation.Import;
  19 import org.springframework.kafka.test.context.EmbeddedKafka;
  20 import org.springframework.test.context.TestPropertySource;
  21 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
  22
  23 import java.time.Duration;
  24 import java.util.*;
  25 import java.util.concurrent.ExecutionException;
  26 import java.util.concurrent.ExecutorService;
  27 import java.util.function.BiConsumer;
  28 import java.util.stream.Collectors;
  29 import java.util.stream.IntStream;
  30
  31 import static de.juplo.kafka.ApplicationTests.PARTITIONS;
  32 import static de.juplo.kafka.ApplicationTests.TOPIC;
  33 import static org.assertj.core.api.Assertions.*;
  34 import static org.awaitility.Awaitility.*;
  35
  36
  37 @SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class)
  38 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
  39 @TestPropertySource(
  40                 properties = {
  41                                 "sumup.adder.bootstrap-server=${spring.embedded.kafka.brokers}",
  42                                 "sumup.adder.topic=" + TOPIC,
  43                                 "sumup.adder.commit-interval=1s",
  44                                 "spring.mongodb.embedded.version=4.4.13" })
  45 @EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
  46 @EnableAutoConfiguration
  47 @AutoConfigureDataMongo
  48 @Slf4j
  49 class ApplicationTests
  50 {
  51         public static final String TOPIC = "FOO";
  52         public static final int PARTITIONS = 10;
  53
  54
  55         StringSerializer stringSerializer = new StringSerializer();
  56
  57         @Autowired
  58         Serializer valueSerializer;
  59         @Autowired
  60         KafkaProducer<String, Bytes> kafkaProducer;
  61         @Autowired
  62         KafkaConsumer<String, String> kafkaConsumer;
  63         @Autowired
  64         KafkaConsumer<Bytes, Bytes> offsetConsumer;
  65         @Autowired
  66         PartitionStatisticsRepository partitionStatisticsRepository;
  67         @Autowired
  68         ApplicationProperties properties;
  69         @Autowired
  70         ExecutorService executor;
  71         @Autowired
  72         PartitionStatisticsRepository repository;
  73         @Autowired
  74         AdderRebalanceListener adderRebalanceListener;
  75         @Autowired
  76         AdderRecordHandler adderRecordHandler;
  77
  78         EndlessConsumer<String, String> endlessConsumer;
  79         Map<TopicPartition, Long> oldOffsets;
  80         Map<TopicPartition, Long> newOffsets;
  81         Set<ConsumerRecord<String, String>> receivedRecords;
  82
  83
  84         /** Tests methods */
  85
  86         @Test
  87         @Disabled("Vorübergehend deaktivert, bis der Testfall angepasst ist")
  88         void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException
  89         {
  90                 send100Messages((partition, key, counter) ->
  91                 {
  92                         Bytes value = new Bytes(valueSerializer.serialize(TOPIC, counter));
  93                         return new ProducerRecord<>(TOPIC, partition, key, value);
  94                 });
  95
  96                 await("100 records received")
  97                                 .atMost(Duration.ofSeconds(30))
  98                                 .pollInterval(Duration.ofSeconds(1))
  99                                 .until(() -> receivedRecords.size() >= 100);
 100
 101                 await("Offsets committed")
 102                                 .atMost(Duration.ofSeconds(10))
 103                                 .pollInterval(Duration.ofSeconds(1))
 104                                 .untilAsserted(() ->
 105                                 {
 106                                         checkSeenOffsetsForProgress();
 107                                         compareToCommitedOffsets(newOffsets);
 108                                 });
 109
 110                 assertThatExceptionOfType(IllegalStateException.class)
 111                                 .isThrownBy(() -> endlessConsumer.exitStatus())
 112                                 .describedAs("Consumer should still be running");
 113         }
 114
 115
 116         /** Helper methods for the verification of expectations */
 117
 118         void compareToCommitedOffsets(Map<TopicPartition, Long> offsetsToCheck)
 119         {
 120                 doForCurrentOffsets((tp, offset) ->
 121                 {
 122                         Long expected = offsetsToCheck.get(tp) + 1;
 123                         log.debug("Checking, if the offset for {} is {}", tp, expected);
 124                         assertThat(offset)
 125                                         .describedAs("Committed offset corresponds to the offset of the consumer")
 126                                         .isEqualTo(expected);
 127                 });
 128         }
 129
 130         void checkSeenOffsetsForProgress()
 131         {
 132                 // Be sure, that some messages were consumed...!
 133                 Set<TopicPartition> withProgress = new HashSet<>();
 134                 partitions().forEach(tp ->
 135                 {
 136                         Long oldOffset = oldOffsets.get(tp) + 1;
 137                         Long newOffset = newOffsets.get(tp) + 1;
 138                         if (!oldOffset.equals(newOffset))
 139                         {
 140                                 log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset);
 141                                 withProgress.add(tp);
 142                         }
 143                 });
 144                 assertThat(withProgress)
 145                                 .describedAs("Some offsets must have changed, compared to the old offset-positions")
 146                                 .isNotEmpty();
 147         }
 148
 149
 150         /** Helper methods for setting up and running the tests */
 151
 152         void seekToEnd()
 153         {
 154                 offsetConsumer.assign(partitions());
 155                 partitions().forEach(tp ->
 156                 {
 157                         Long offset = offsetConsumer.position(tp);
 158                         log.info("New position for {}: {}", tp, offset);
 159                         Integer partition = tp.partition();
 160                         StateDocument document =
 161                                         partitionStatisticsRepository
 162                                                         .findById(partition.toString())
 163                                                         .orElse(new StateDocument(partition));
 164                         document.offset = offset;
 165                         partitionStatisticsRepository.save(document);
 166                 });
 167                 offsetConsumer.unsubscribe();
 168         }
 169
 170         void doForCurrentOffsets(BiConsumer<TopicPartition, Long> consumer)
 171         {
 172                 partitions().forEach(tp ->
 173                 {
 174                         String partition = Integer.toString(tp.partition());
 175                         Optional<Long> offset = partitionStatisticsRepository.findById(partition).map(document -> document.offset);
 176                         consumer.accept(tp, offset.orElse(0l));
 177                 });
 178         }
 179
 180         List<TopicPartition> partitions()
 181         {
 182                 return
 183                                 IntStream
 184                                                 .range(0, PARTITIONS)
 185                                                 .mapToObj(partition -> new TopicPartition(TOPIC, partition))
 186                                                 .collect(Collectors.toList());
 187         }
 188
 189
 190         public interface RecordGenerator<K, V>
 191         {
 192                 public ProducerRecord<String, Bytes> generate(int partition, String key, long counter);
 193         }
 194
 195         void send100Messages(RecordGenerator recordGenerator)
 196         {
 197                 long i = 0;
 198
 199                 for (int partition = 0; partition < 10; partition++)
 200                 {
 201                         for (int key = 0; key < 10; key++)
 202                         {
 203                                 ProducerRecord<String, Bytes> record =
 204                                                 recordGenerator.generate(partition, Integer.toString(partition*10+key%2), ++i);
 205
 206                                 kafkaProducer.send(record, (metadata, e) ->
 207                                 {
 208                                         if (metadata != null)
 209                                         {
 210                                                 log.debug(
 211                                                                 "{}|{} - {}={}",
 212                                                                 metadata.partition(),
 213                                                                 metadata.offset(),
 214                                                                 record.key(),
 215                                                                 record.value());
 216                                         }
 217                                         else
 218                                         {
 219                                                 log.warn(
 220                                                                 "Exception for {}={}: {}",
 221                                                                 record.key(),
 222                                                                 record.value(),
 223                                                                 e.toString());
 224                                         }
 225                                 });
 226                         }
 227                 }
 228         }
 229
 230
 231         @BeforeEach
 232         public void init()
 233         {
 234                 seekToEnd();
 235
 236                 oldOffsets = new HashMap<>();
 237                 newOffsets = new HashMap<>();
 238                 receivedRecords = new HashSet<>();
 239
 240                 doForCurrentOffsets((tp, offset) ->
 241                 {
 242                         oldOffsets.put(tp, offset - 1);
 243                         newOffsets.put(tp, offset - 1);
 244                 });
 245
 246                 TestRecordHandler<String, String> captureOffsetAndExecuteTestHandler =
 247                                 new TestRecordHandler<String, String>(adderRecordHandler) {
 248                                         @Override
 249                                         public void onNewRecord(ConsumerRecord<String, String> record)
 250                                         {
 251                                                 newOffsets.put(
 252                                                                 new TopicPartition(record.topic(), record.partition()),
 253                                                                 record.offset());
 254                                                 receivedRecords.add(record);
 255                                         }
 256                                 };
 257
 258                 endlessConsumer =
 259                                 new EndlessConsumer<>(
 260                                                 executor,
 261                                                 properties.getClientId(),
 262                                                 properties.getTopic(),
 263                                                 kafkaConsumer,
 264                                                 adderRebalanceListener,
 265                                                 captureOffsetAndExecuteTestHandler);
 266
 267                 endlessConsumer.start();
 268         }
 269
 270         @AfterEach
 271         public void deinit()
 272         {
 273                 try
 274                 {
 275                         endlessConsumer.stop();
 276                 }
 277                 catch (Exception e)
 278                 {
 279                         log.info("Exception while stopping the consumer: {}", e.toString());
 280                 }
 281         }
 282
 283
 284         @TestConfiguration
 285         @Import(ApplicationConfiguration.class)
 286         public static class Configuration
 287         {
 288                 @Bean
 289                 Serializer<Long> serializer()
 290                 {
 291                         return new LongSerializer();
 292                 }
 293
 294                 @Bean
 295                 KafkaProducer<String, Bytes> kafkaProducer(ApplicationProperties properties)
 296                 {
 297                         Properties props = new Properties();
 298                         props.put("bootstrap.servers", properties.getBootstrapServer());
 299                         props.put("linger.ms", 100);
 300                         props.put("key.serializer", StringSerializer.class.getName());
 301                         props.put("value.serializer", BytesSerializer.class.getName());
 302
 303                         return new KafkaProducer<>(props);
 304                 }
 305
 306                 @Bean
 307                 KafkaConsumer<Bytes, Bytes> offsetConsumer(ApplicationProperties properties)
 308                 {
 309                         Properties props = new Properties();
 310                         props.put("bootstrap.servers", properties.getBootstrapServer());
 311                         props.put("client.id", "OFFSET-CONSUMER");
 312                         props.put("enable.auto.commit", false);
 313                         props.put("auto.offset.reset", "latest");
 314                         props.put("key.deserializer", BytesDeserializer.class.getName());
 315                         props.put("value.deserializer", BytesDeserializer.class.getName());
 316
 317                         return new KafkaConsumer<>(props);
 318                 }
 319         }
 320 }