根据这里提供的文档,我正在尝试使用poc将消息发送到侦听器,正如同一文档中提到的,下面是我如何编写配置的。
@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);
}
}
听众如下:,
@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();
}
}
即使我正在生成指向同一主题的消息,而此使用者正在处理同一主题,侦听器也没有执行。
我正在运行Kafka0.10.0.1,这是我当前的pom。与许多命令行示例不同,这个使用者是作为springbootweb应用程序工作的。
<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>
我花了大量的时间来弄清楚为什么这个听众在主题有信息的时候没有被击中,我做错了什么。
我知道我可以使用通道接收消息(我已经在代码中注解了其中的配置部分),但是这里的并发处理是干净的。
这种实现是否可以使用异步消息消费。
1条答案
按热度按时间dhxwm5r41#
你必须加上
@EnableKafka
伴随着@Configuration
.很快会添加一些描述。
同时: