Kafka应用Demo：指派分区订阅消息消费

环境准备

Kafka环境搭建和生产者样例代码与《Kafka应用Demo：按主题订阅消费消息》相同。

消费者代码样例

public class KafkaConsumerService {private static final Logger LOGGER = LoggerFactory.getLogger(KafkaConsumerService.class);private static final String NEO_TOPIC = "elon-topic";Properties properties = new Properties();private KafkaConsumer consumer = null;public KafkaConsumerService() {TopicPartition partition0 = new TopicPartition(NEO_TOPIC, 0);TopicPartition partition1 = new TopicPartition(NEO_TOPIC, 1);properties.put("bootstrap.servers","192.168.5.128:9092");  // 指定 Brokerproperties.put("group.id", "neo2");              // 指定消费组群 IDproperties.put("max.poll.records", "1");properties.put("enable.auto.commit", "false");properties.put("key.deserializer", StringDeserializer.class); // 将 key 的字节数组转成 Java 对象properties.put("value.deserializer", StringDeserializer.class);  // 将 value 的字节数组转成 Java 对象consumer = new KafkaConsumer<String, String>(properties);List<TopicPartition> partitionList = new ArrayList<>();partitionList.add(partition1);partitionList.add(partition0);consumer.assign(partitionList);new Thread(this::receiveMessage).start();}public void receiveMessage() {try {while (true) {synchronized (this) {ConsumerRecords<String,String> records = consumer.poll(Duration.ofMillis(Long.MAX_VALUE));LOGGER.info("Fetch record num:{}", records.count());for (ConsumerRecord<String,String> record: records) {String info = String.format("[Topic: %s][Partition:%d][Offset:%d][Key:%s][Message:%s]",record.topic(), record.partition(), record.offset(), record.key(), record.value());LOGGER.info("Received:" + info);Thread.sleep(10000);}consumer.commitSync();}}} catch (Exception e){} finally {consumer.close();}}
}