我尝试将两个消费者订阅到一个 EmbeddedKafkaBroker
。第一个成功了,第二个失败了。 @EmbeddedKafka
和 @ClassRule
代理均失败。
@RunWith(SpringRunner.class)
@SpringBootTest
@EmbeddedKafka(topics = { "topic" })
public class AnnotationEmbeddedKafkaTest {
@Autowired
private EmbeddedKafkaBroker broker;
@Test
public void annotationEmbeddedKafkaTest() {
Map<String, Object> consumerProps1 = KafkaTestUtils.consumerProps("testEmbedded", "false", broker);
Consumer<String, String> consumer1 = new KafkaConsumer<>(consumerProps1);
broker.consumeFromAnEmbeddedTopic(consumer1, "topic");
System.out.println("consumer1 assignments=" + consumer1.assignment());
Map<String, Object> consumerProps2 = KafkaTestUtils.consumerProps("testEmbedded", "false", broker);
Consumer<String, String> consumer2 = new KafkaConsumer<>(consumerProps2);
broker.consumeFromAnEmbeddedTopic(consumer2, "topic");
System.out.println("consumer2 assignments=" + consumer2.assignment());
}
}
@RunWith(SpringRunner.class)
@SpringBootTest
public class ClassRuleEmbeddedKafkaTest {
@ClassRule
public static EmbeddedKafkaRule embeddedKafkaRule = new EmbeddedKafkaRule(1, false, "topic");
private EmbeddedKafkaBroker broker = embeddedKafkaRule.getEmbeddedKafka();
@Test
public void classRuleEmbeddedKafkaTest() {
Map<String, Object> consumerProps1 = KafkaTestUtils.consumerProps("testEmbedded", "false", broker);
Consumer<String, String> consumer1 = new KafkaConsumer<>(consumerProps1);
broker.consumeFromAnEmbeddedTopic(consumer1, "topic");
System.out.println("consumer1 assignments=" + consumer1.assignment());
Map<String, Object> consumerProps2 = KafkaTestUtils.consumerProps("testEmbedded", "false", broker);
Consumer<String, String> consumer2 = new KafkaConsumer<>(consumerProps2);
broker.consumeFromAnEmbeddedTopic(consumer2, "topic");
System.out.println("consumer2 assignments=" + consumer2.assignment());
}
}
我希望这两个消费者可以订阅一个 EmbeddedKafkaBroker
。 Spring Kafka 测试可以吗?
我在这里复制了这个:https://github.com/yraydhitya/spring-kafka-test-multiple-consumers
答案 0 :(得分:0)
如果您希望两个消费者都收到来自主题的所有消息,您需要他们成为不同消费者组的一部分,例如:
Map<String, Object> consumerProps1 = KafkaTestUtils.consumerProps("testEmbedded1", "false", broker);
和
Map<String, Object> consumerProps2 = KafkaTestUtils.consumerProps("testEmbedded2", "false", broker);
否则每个消费者将被分配到主题的不同分区,并且由于您嵌入的 kafka 主题(默认情况下)只有一个分区,因此只会分配一个消费者。