我有一个Spring Boot应用程序，该应用程序的使用者从一个群集中的主题进行消费，并在另一个群集中产生另一个主题。
现在，我正在尝试使用Spring Embedded Kafka编写集成测试用例，但是出现问题KafkaTemplate could not be registered. A bean with that name has already been defined in class path resource
消费阶层
@Service
public class KafkaConsumerService {
@Autowired
private KafkaProducerService kafkaProducerService;
@KafkaListener(topics = "${kafka.producer.topic}")
public void professor(List<Professor> pro) {
pro.forEach(kafkaProducerService::produce);
}
}
生产者阶层
@Service
public class KafkaProducerService {
@Value("${kafka.producer.topic}")
private String topic;
@Autowired
private KafkaTemplate<String, Object> kafkaTemplate;
public void produce(Professor pro) {
kafkaTemplate.send(topic,"professor",pro);
}
}
在我的测试案例中，我想覆盖
KafkaTemplate，以便当我在kafkaConsumerService.professor中调用Test方法时，它应该将数据生成到嵌入式Kafka中，并且我应该对其进行验证。测试配置
@TestConfiguration
@EmbeddedKafka(partitions = 1, controlledShutdown = false,
brokerProperties = {"listeners=PLAINTEXT://localhost:3333", "port=3333"})
public class KafkaProducerConfigTest {
@Autowired
KafkaEmbedded kafkaEmbeded;
@Autowired
KafkaListenerEndpointRegistry kafkaListenerEndpointRegistry;
@Before
public void setUp() throws Exception {
for (MessageListenerContainer messageListenerContainer : kafkaListenerEndpointRegistry.getListenerContainers()) {
ContainerTestUtils.waitForAssignment(messageListenerContainer,
kafkaEmbeded.getPartitionsPerTopic());
}
}
@Bean
public ProducerFactory<String, Object> producerFactory() {
return new DefaultKafkaProducerFactory<>(KafkaTestUtils.producerProps(kafkaEmbeded));
}
@Bean
public KafkaTemplate<String, Object> kafkaTemplate() {
KafkaTemplate<String, Object> kafkaTemplate = new KafkaTemplate<>(producerFactory());
return kafkaTemplate;
}
}
测试班
@EnableKafka
@SpringBootTest(classes = {KafkaProducerConfigTest.class})
@RunWith(SpringRunner.class)
public class KafkaProducerServiceTest {
@Autowired
private KafkaConsumerService kafkaConsumerService;
@Test
public void testReceive() throws Exception {
kafkaConsumerService.professor(Arrays.asList(new Professor()));
//How to check messages is sent to kafka?
}
}
错误
The bean 'kafkaTemplate', defined in com.kafka.configuration.KafkaProducerConfigTest, could not be registered.
A bean with that name has already been defined in class path resource [com/kafka/configuration/KafkaProducerConfig.class] and overriding is disabled.
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
并且有人可以帮助我如何验证发送到嵌入式Kafka服务器的消息吗？
注意我有一些过时的警告
不推荐使用KafkaEmbedded类型
不推荐使用KafkaEmbedded类型的getPartitionsPerTopic（）方法
不推荐使用来自KafkaTestUtils类型的方法producerProps（KafkaEmbedded）
最佳答案
引导2.1 disables bean overriding by default。
默认情况下禁用Bean覆盖，以防止意外覆盖Bean。如果要依赖覆盖，则需要将spring.main.allow-bean-definition-overriding设置为true。
关于弃用；请参阅@EmbeddedKafka的javadocs。它由EmbeddedKafkaBroker代替。
关于java - 嵌入式Kafka的 Spring Kafka集成测试，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54754662/