带Spring Boot的简单嵌入式Kafka测试示例

小编典典

带Spring Boot的简单嵌入式Kafka测试示例

spring-boot

我正在互联网上搜索，找不到嵌入式Kafka测试的工作示例。

我的设置是：

Spring Boot
多个@KafkaListener在一个类中具有不同的主题
嵌入式Kafka可以很好地进行测试
使用发送到主题的Kafkatemplate进行测试，但是 @KafkaListener方法即使经过大量睡眠后仍无法接收任何内容
没有显示警告或错误，仅在日志中显示来自Kafka的垃圾信息

请帮我。大部分是配置过度或工程过度的示例。我相信这可以简单完成。谢谢你们！

@Controller
public class KafkaController {

    private static final Logger LOG = getLogger(KafkaController.class);

    @KafkaListener(topics = "test.kafka.topic")
    public void receiveDunningHead(final String payload) {
        LOG.debug("Receiving event with payload [{}]", payload);
        //I will do database stuff here which i could check in db for testing
    }
}

私有静态字符串SENDER_TOPIC =“ test.kafka.topic”;

@ClassRule
public static KafkaEmbedded embeddedKafka = new KafkaEmbedded(1, true, SENDER_TOPIC);

@Test
    public void testSend() throws InterruptedException, ExecutionException {

        Map<String, Object> senderProps = KafkaTestUtils.producerProps(embeddedKafka);

        KafkaProducer<Integer, String> producer = new KafkaProducer<>(senderProps);
        producer.send(new ProducerRecord<>(SENDER_TOPIC, 0, 0, "message00")).get();
        producer.send(new ProducerRecord<>(SENDER_TOPIC, 0, 1, "message01")).get();
        producer.send(new ProducerRecord<>(SENDER_TOPIC, 1, 0, "message10")).get();
        Thread.sleep(10000);
    }

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2020-05-30

共1个答案

小编典典

嵌入式Kafka测试适用于以下配置，

测试课注释

@EnableKafka
@SpringBootTest(classes = {KafkaController.class}) // Specify @KafkaListener class if its not the same class, or not loaded with test config
@EmbeddedKafka(
    partitions = 1, 
    controlledShutdown = false,
    brokerProperties = {
        "listeners=PLAINTEXT://localhost:3333", 
        "port=3333"
})
public class KafkaConsumerTest {
    @Autowired
    KafkaEmbedded kafkaEmbeded;

    @Autowired
    KafkaListenerEndpointRegistry kafkaListenerEndpointRegistry;

注释之前的设置方法

@Before
public void setUp() throws Exception {
  for (MessageListenerContainer messageListenerContainer : kafkaListenerEndpointRegistry.getListenerContainers()) {
    ContainerTestUtils.waitForAssignment(messageListenerContainer, 
    kafkaEmbeded.getPartitionsPerTopic());
  }
}

注意：我不是@ClassRule用来创建嵌入式Kafka而是自动装配
@Autowired embeddedKafka

@Test
public void testReceive() throws Exception {
     kafkaTemplate.send(topic, data);
}

希望这可以帮助！

编辑：测试配置类标记为 @TestConfiguration

@TestConfiguration
public class TestConfig {

@Bean
public ProducerFactory<String, String> producerFactory() {
    return new DefaultKafkaProducerFactory<>(KafkaTestUtils.producerProps(kafkaEmbedded));
}

@Bean
public KafkaTemplate<String, String> kafkaTemplate() {
    KafkaTemplate<String, String> kafkaTemplate = new KafkaTemplate<>(producerFactory());
    kafkaTemplate.setDefaultTopic(topic);
    return kafkaTemplate;
}

现在@Test方法将自动连接KafkaTemplate并用于发送消息

kafkaTemplate.send(topic, data);

用上面的行更新了答案代码块

2020-05-30