Question

根据提供的文档here，我正在尝试使用POC将消息传入监听器，如same documentation中所述，以下是我编写配置的方法。

@Configuration
public class KafkaConsumerConfig {

    public static final String TEST_TOPIC_ID = "record-stream";

    @Value("${kafka.topic:" + TEST_TOPIC_ID + "}")
    private String topic;

    @Value("${kafka.address:localhost:9092}")
    private String brokerAddress;


    /*
      @Bean public KafkaMessageDrivenChannelAdapter<String, String> adapter(
      KafkaMessageListenerContainer<String, String> container) {
      KafkaMessageDrivenChannelAdapter<String, String>
      kafkaMessageDrivenChannelAdapter = new
      KafkaMessageDrivenChannelAdapter<>( container, ListenerMode.record);
      kafkaMessageDrivenChannelAdapter.setOutputChannel(received()); return
      kafkaMessageDrivenChannelAdapter; }

      @Bean public QueueChannel received() { return new QueueChannel(); }
     */

    @Bean
    public KafkaListenerContainerFactory<ConcurrentMessageListenerContainer<String, String>> kafkaListenerContainerFactory() {

        ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
        factory.setConsumerFactory(consumerFactory());
        factory.setConcurrency(3);
        factory.getContainerProperties().setPollTimeout(30000);
        return factory;

    }

    /*
     * @Bean public KafkaMessageListenerContainer<String, String> container()
     * throws Exception { ContainerProperties properties = new
     * ContainerProperties(this.topic); // set more properties return new
     * KafkaMessageListenerContainer<>(consumerFactory(), properties); }
     */

    @Bean
    public ConsumerFactory<String, String> consumerFactory() {
        Map<String, Object> props = new HashMap<>();
        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, this.brokerAddress);
        // props.put(ConsumerConfig.GROUP_ID_CONFIG, "mygroup");
        props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest"); // earliest
                                                                        // smallest
        props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, true);
        props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "100");
        props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "15000");
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        return new DefaultKafkaConsumerFactory<>(props);
    }

}

和监听器如下，

@Service
public class Listener {

    private Logger log = Logger.getLogger(Listener.class);


    @KafkaListener(topicPattern = KafkaConsumerConfig.TEST_TOPIC_ID, containerFactory = "kafkaListenerContainerFactory")
    public void process(String message/* , Acknowledgment ack */) {
        Gson gson = new Gson();
        Record record = gson.fromJson(message, Record.class);

        log.info(record.getId() + " " + record.getName());
        // ack.acknowledge();
    }

}

即使我正在为同一主题生成消息，并且此消费者正在处理同一主题，但Listener未执行。

我正在运行Kafka 0.10.0.1，这是我目前的pom。与许多命令行示例不同，此消费者作为Spring启动Web应用程序工作。

   <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>

        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-kafka</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-java-dsl</artifactId>

        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

我花了很多时间弄清楚为什么当主题有消息时这个监听器没有被击中，我做错了什么。

我知道我可以使用通道接收消息（我在代码中注释了配置的部分），但是这里并发处理干净。

这种实现是否可以通过异步消息使用来实现。

Answer 1

您必须与@EnableKafka一起添加@Configuration。

很快就会对add进行一些描述。

同时

@Configuration
@EnableKafka
public class KafkaConsumerConfig {

Spring Integration Kafka Consumer Listener无法接收消息

1 个答案: